OverweightNCT00710398
"Improving Diet, Exercise And Lifestyle (IDEAL) for Women" Study
A study testing Exercise - Aerobic and Resistance and Dietary - Caloric Restriction in people with Overweight and Obesity, run by McMaster University at 1 site in Canada.
Trial summary
Diets all share the same principle: eat less energy than you need. This results in weight loss. However, the weight loss is usually a combination of a loss of body fat and muscle mass. Additionally, one's bones may begin to weaken, albeit very slowly, while on a diet, which could have serious long-term consequences. Read more about this study
- Who is it for?
- Ages 19 to 45 years, women onlyHealthy volunteers can take part
- Conditions the study is for
- Overweight, Obesity
- What is being tested?
- Exercise - Aerobic and Resistance and Dietary - Caloric Restriction
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 90 participants
- Where
- 1 siteCanada
- Study dates
- Jul 2008to Jan 2011
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 19 to 45 years
- Women only
- Healthy volunteers accepted
- Adult
Who may be able to join
- Healthy pre-menopausal females
- Body Mass Index (BMI) between 27-40 kg/m2
- Low dairy consumption (~<500 mg/d Ca2+)
- Sedentary lifestyle (i.e., exercise less than once/week)
- Regular menstrual cycle
Who cannot join
- Allergy to dairy protein
- Lactose intolerance
- Vegan diet
- Pregnant
- Taking vitamin or mineral supplements
- Have a gastrointestinal disease or condition
Show all 10Show fewer
- Recent orthopedic injury
- Diagnosed with heart, kidney, liver or pancreatic disease
- Smoker
- Alcohol consumption of more than 2 drinks/day
Trial locations and contacts
1 site in 1 country.
About this study
Official title: The Impact of Higher Dairy and Dietary Protein on the "Quality" of Hypoenergetic diet-and Exercise-induced Weight Loss in Pre-menopausal, Overweight and Obese Young Women
Diets all share the same principle: eat less energy than you need. This results in weight loss. However, the weight loss is usually a combination of a loss of body fat and muscle mass. Additionally, one's bones may begin to weaken, albeit very slowly, while on a diet, which could have serious long-term consequences. Thus, the investigators believe that the goal of any weight loss strategy should be to lose body fat and spare muscle. The investigators reasoning is two-fold. 1) Fat is not only stored under the skin, but also in and around the internal organs. When this occurs, the organ itself may not function properly. Losing fat mass is a very good thing from a health standpoint, since fat is not just a storage site for extra energy. Scientists have now shown that 'extra' body fat itself can actually secrete substances and when these substances get into your blood, they cause many problems and may even contribute to the development of diabetes. 2) Sparing muscle as an individual loses weight is very important. Muscle is a very 'metabolically active' tissue and is, by analogy, like the body's furnace. Muscle burns fuel from the food individuals eat and also from stored fuels, like fat. Hence, it's easy to see why you don't want to lose muscle because you'd be losing one of your body's best fat burners. More importantly, muscle is also a big storage site and furnace for blood sugar. In people with diabetes (elevated blood sugar), a big part of the problem is with their muscles - they simply do not take up and store or burn enough sugar. For these reasons, your goal should be to lose fat and preserve muscle while dieting.
There are many different diets to choose from (e.g. high protein, low carbohydrate, high fat, high fiber, etc.). A diet that has been shown to be quite successful, however, is one that is higher in protein (but not excessive). Thus, in this study, the investigators are proposing to test whether a higher protein (with dairy) and calcium diet promotes body fat loss and muscle mass retention. The investigators believe that a diet higher in protein (with an emphasis on dairy), but still within accepted healthy ranges, with higher dietary calcium may result in greater loss of body fat and retention of muscle than a diet with a conventional amount of protein and adequate calcium or a conventional amount of protein with little calcium (i.e. low dairy). Based on previous research, the investigators think that people with low calcium intakes to begin with would stand to benefit the most. There is also a good reason to think that the high protein/high calcium diet may result in greater reductions in blood cholesterol and blood sugar, both of which would reduce a person's risk for heart disease and diabetes.
The investigators will test this diet in premenopausal women who are overweight or obese. The investigators believe that this group is a good one to target for several reasons. First, women of this age who are overweight or obese are, if they continue to carry this excess weight, are at serious risk for developing chronic diseases such as heart disease, diabetes, and possibly cancer at an early age. Second, these women will often begin to gradually consume less dairy because many perceive dairy foods as fattening. Thus, if the investigators proposals are correct the investigators will hopefully be able to equip health professionals with a tried and tested, palatable, dietary strategy in a population segment who, because of their age, would benefit greatly were their disease risk to be reduced.
Read the detailed description
Overweight to obese female subjects, who are habitually low dairy consumers and between the ages of 19-45 years will be recruited from the McMaster University student and staff population and from the surrounding Hamilton area. At study entry, all subjects will be asked to complete a standard screening questionnaire to document their medical history, current medication use, physical activity level, smoking habits, and alcohol consumption. Subjects will also complete a calcium food frequency questionnaire. Before randomization and study commencement, baseline measures will be done. These include: anthropometrics, fasting blood samples, fasting urine sample, resting energy expenditure measures (REE), muscle and adipose biopsies, cardiovascular measures (blood pressure, heart rate, blood vessel stiffness and arterial elasticity) body composition (dual-energy x-ray absorptiometry [DXA]), and a 7-day baseline food record analysis. Also, subjects' strength and fitness will be assessed (1 repetition maximum (RM) and submaximal Astrand Test evaluations). During the study, fasting blood samples will also be taken at weeks 4, 8, 12 and 16, DXA will also be done at weeks 8 and 16, validated Body Image questionnaires will be filled out again t weeks 8 and 16, and body weight will be recorded every week. All other measures will be repeated after 16 weeks (1RM, Astrand Test, biopsies, cardiovascular measures, REE). Magnetic Resonance Imaging (MRI) will be carried out on a smaller portion of subjects on a voluntary basis at weeks 0 and 16. Apon completion of the baseline testing, subjects will be randomly assigned to one of the three intervention groups.
Part of the intervention will be in the form of 2 daily chocolate drinks (a post-exercise drink plus one extra drink per day). Drink composition will differ depending on which group subjects are randomized to. Drinks will be made to look and taste similar. In terms of the daily diets, the DairyPro (middle/second) group will employ the same macronutrient distribution as the Control (first) group but half the protein will be derived from dairy sources, with subjects being asked to consume, on top of their supplemental chocolate drink, 2 yogurts (100 g each). In the control group, protein will be derived from sources other than dairy. In the HiDairyPro (third) group, dietary protein will be manipulated so as to comprise twice as much dietary energy versus the other two groups (i.e., 30% of energy intake versus 15%). Protein (half of their daily requirement) will be derived from dairy protein by asking subjects to consume, on top of their supplemental chocolate drink, 1 serving (250 ml) of 1% regular milk, 4 yogurts (100 g each) and 2 pieces of cheese (21 g each).
Overview of supplemental drink composition and diet composition by group:
- Control (Con) - a group consuming twice daily drinks containing no dairy protein or calcium. Daily protein (15% total kcals) should be from non-dairy sources (i.e. meat, egg, fish, chicken, lentils, beans, wheat gluten).
- Dairy Protein Group (DairyPro) - a group consuming twice daily drinks containing 1% chocolate milk and at least half of their daily protein (15% total kcals) intake from dairy sources.
- High Dairy Protein Group (HiDairyPro) - a group consuming twice daily drinks containing 1% artificially sweetened chocolate milk along with a diet formulated to contain 30% (as opposed to only 15% in the Con and DairyPro groups) of their dietary energy from protein with at least half of that coming from dairy protein.
Subjects will meet with a study dietitian/nutritionist at the beginning and biweekly throughout the 16 weeks, and be provided with individual dietary counseling to reduce daily calories by 500 kcal/d. Subjects will be provided with template diet records, nutrition information sheets and macronutrient specific exchange lists to help with dietary compliance and to promote healthy food choices. The weight-reducing diets will have macronutrient and micronutrient profiles that are in accordance with the dietary regulations set forth by Canada's Food Guide and the dietary reference intakes (DRIs). The macronutrient profile of the 2 moderate protein groups (control and DairyPro) will be 15:30:55 (PRO:Fat:CHO), whereas the subjects in the High dairy protein group (HiDairyPro) will consume a profile of 30:30:40 (15% substitution of carbohydrate for protein). Subjects will consume all other food (aside from their designated drinks) in any manner they choose in accordance with the macronutrient profile of their respective randomization allocations. Adherence to the prescribed diet will be via collection of assigned biweekly food records, frequent contact with subjects, and regular dietary counseling sessions.
In addition, all subjects will be given a custom exercise prescription consisting of supervised resistance exercise and aerobic exercise. Intensity and duration of all exercise sessions will be monitored and energy expenditure quantified using portable, validated units that integrate accelerometry, heat flux and skin temperature. Exercise will take place in a supervised setting at McMaster University. Subjects will perform exercise 7d/wk and will exercise supervised 5d/wk (Mon - Fri). Resistance training sessions will take place 2x/week. During these sessions, subjects will engage in a circuit weightlifting routine using guided motion machines.
- Conditions
- Overweight, Obesity
- Being tested
- Exercise - Aerobic and Resistance, Dietary - Caloric Restriction
- Keywords
- Dairy Products, Dietary Protein, Body Composition, Fat mass loss, Lean mass gain, Pre-menopausal Women
- Medical subject headings
- Overweight, Obesity
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Exercise - Aerobic and ResistanceBehavioural
Subjects will perform exercise (aerobic and resistance) 7d/wk and will exercise supervised 5d/wk. Exercise will be carried out to expend 250 kcals/day. Supervised resistance training sessions will take place 2 days/wk and aerobic exercise will take place every day. During the resistance exercise sessions, subjects will engage in a circuit weightlifting routine using guided motion machines. During the aerobic sessions, subjects may choose whatever exercise modality they like (e.g. walking on track or treadmill, biking, elliptical, etc.). Subjects will wear devices that measure energy expenditure to get a better idea of the intensity and duration needed to expend 250 kcals with their exercise machine/modality of choice.
Dietary - Caloric RestrictionBehavioural
Subjects will be counselled on their respective hypocaloric diets during the 16 wk period. Adherence to the prescribed diet will be assessed via collection of assigned food records (biweekly), frequent contact with subjects, and regular dietary counseling sessions. The daily dietary energy deficit will be 500 kcal per day based on the subjects' estimated daily caloric requirements (based on height, weight, age, sex), multiplied by a sedentary activity factor.
Additionally, subjects will consume 2 drinks per day that will differ depending on their randomization allocation. Subjects in the Dairy Protein and High Dairy Protein group will be provided with dairy products (e.g. milk, cheese, yogurt) to consume on a weekly basis to help facilitate their prescribed dairy and dietary protein intake.
| Study group | Role | What they receive |
|---|---|---|
| Control | Experimental | A group consuming twice daily (post-exercise and in morning/afternoon) drinks containing no dairy protein or calcium. Daily protein intake (15% total kcals) should be from non-dairy sources (i.e. meat, egg, fish, chicken, wheat gluten). Receives: Behavioral: Exercise - Aerobic and Resistance; Behavioral: Dietary - Caloric Restriction |
| Dairy Protein | Experimental | A group consuming twice daily drinks (post-exercise and morning) containing 1% chocolate milk (in 1.5 cup servings = 3 cups/d). Daily protein intake is set at 15% total kcals with ~8% coming from dairy sources. Receives: Behavioral: Exercise - Aerobic and Resistance; Behavioral: Dietary - Caloric Restriction |
| High Dairy Protein | Experimental | A group consuming twice daily drinks of 1% artificially sweetened chocolate milk (in 1.5 cup servings = 3 cups/d). Their diet contains 30% protein (as opposed to only 15% in the Con and DairyPro groups) with at least 50% of that coming from dairy sources. Receives: Behavioral: Exercise - Aerobic and Resistance; Behavioral: Dietary - Caloric Restriction |
What is being measured
The primary outcome is the main question the study is designed to answer.
Fat mass, lean mass, bone mass (BMD, BMC), total mass (measured via DXA scan)
Measured: Measured at weeks 0, 8 and 16
Secondary outcomes (10)
Blood sample analyses (lipids)
Measured: Measured at weeks 0, 4, 8, 12 and 16
Muscle and adipose tissue biopsies
Measured: Measured at weeks 0 and 16
Food record macronutrient and micronutrient analyses (7-day at beginning and end, and 3-day throughout intervention)
Measured: Biweekly from weeks 0-16
Resting Energy Expenditure (metabolic cart determination).
Measured: Measured at weeks 0 and 16
Fitness and strength measures (modified Astrand Test and 1 RM test)
Measured: Measured at weeks 0 and 16
Blood sample analyses (Vitamin D [25OHD], PTH, A1c, glucose, insulin)
Measured: Measured at weeks 0 and 16
Magnetic Resonance Imaging (MRI) *strictly on a voluntary basis
Measured: Measured at weeks 0 and 16
Spot Urine Collection
Measured: Measured at weeks 0 and 16
Body Image (Assessed with a validated questionnaire)
Measured: Measured at weeks 0, 8 and 16
Cardiovascular Measures (Assessment of blood pressure, heart rate, blood vessel stiffness and arterial elasticity)
Measured: Measured at weeks 0 and 16
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted4 Jul 2008 (estimated)
- Study startJul 2008
- Primary completionMay 2010
- Study completionJan 2011
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (2)Papers the sponsor has linked to this study.
- Other trials for OverweightStudies of the same condition, open and under way.
- More trials run by McMaster UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 90 participants (estimated)
Sponsor and investigators
- Lead sponsor
- McMaster University
- Sponsor type
- University, hospital or other
- Collaborators
- Dairy Farmers of Canada, Dairy Management Inc., Hamilton Health Sciences Corporation
- Investigators
- Stuart M Phillips, Ph.D., Principal investigator, Department of Kinesiology, McMaster UniversityAndrea R Josse, M.Sc., Study director, Department of Kinesiology, McMaster University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00710398
- Sponsor's protocol ID
- REB 07-409
- Status last verified
- Jul 2011
- First submitted
- 1 Jul 2008
- Last updated
- 20 Jul 2011
- Results posted
- No
- Data monitoring committee
- No
Publications
Josse AR, Atkinson SA, Tarnopolsky MA, Phillips SM. Diets higher in dairy foods and dietary protein support bone health during diet- and exercise-induced weight loss in overweight and obese premenopausal women. J Clin Endocrinol Metab. 2012 Jan;97(1):251-60. doi: 10.1210/jc.2011-2165. Epub 2011 Nov 2.
PubMed 22049177Josse AR, Atkinson SA, Tarnopolsky MA, Phillips SM. Increased consumption of dairy foods and protein during diet- and exercise-induced weight loss promotes fat mass loss and lean mass gain in overweight and obese premenopausal women. J Nutr. 2011 Sep;141(9):1626-34. doi: 10.3945/jn.111.141028. Epub 2011 Jul 20.
PubMed 21775530
Study at a glance
From the registry record, last updated by the sponsor on 20 Jul 2011. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Impact of Higher Dairy and Dietary Protein on the "Quality" of Hypoenergetic diet-and Exercise-induced Weight Loss in Pre-menopausal, Overweight and Obese Young Women
- ClinicalTrials.gov ID
- NCT00710398
- Acronym / sponsor ID
- REB 07-409
- Conditions
- Overweight, Obesity
- Keywords
- Dairy Products, Dietary Protein, Body Composition, Fat mass loss, Lean mass gain, Pre-menopausal Women
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 90 participants (estimated)
- Lead sponsor
- McMaster UniversityUniversity, hospital or other
- Collaborators
- Dairy Farmers of Canada, Dairy Management Inc., Hamilton Health Sciences Corporation
- Study start
- Jul 2008
- Primary completion
- May 2010 (actual)
- Study completion
- Jan 2011 (actual)
- First posted
- 4 Jul 2008 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Diets all share the same principle: eat less energy than you need. This results in weight loss. However, the weight loss is usually a combination of a loss of body fat and muscle mass. Additionally, one's bones may begin to weaken, albeit very slowly, while on a diet, which could have serious long-term consequences. Thus, the investigators believe that the goal of any weight loss strategy should be to lose body fat and spare muscle. The investigators reasoning is two-fold. 1) Fat is not only stored under the skin, but also in and around the internal organs. When this occurs, the organ itself may not function properly. Losing fat mass is a very good thing from a health standpoint, since fat is not just a storage site for extra energy. Scientists have now shown that 'extra' body fat itself can actually secrete substances and when these substances get into your blood, they cause many problems and may even contribute to the development of diabetes. 2) Sparing muscle as an individual loses weight is very important. Muscle is a very 'metabolically active' tissue and is, by analogy, like the body's furnace. Muscle burns fuel from the food individuals eat and also from stored fuels, like fat. Hence, it's easy to see why you don't want to lose muscle because you'd be losing one of your body's best fat burners. More importantly, muscle is also a big storage site and furnace for blood sugar. In people with diabetes (elevated blood sugar), a big part of the problem is with their muscles - they simply do not take up and store or burn enough sugar. For these reasons, your goal should be to lose fat and preserve muscle while dieting.
There are many different diets to choose from (e.g. high protein, low carbohydrate, high fat, high fiber, etc.). A diet that has been shown to be quite successful, however, is one that is higher in protein (but not excessive). Thus, in this study, the investigators are proposing to test whether a higher protein (with dairy) and calcium diet promotes body fat loss and muscle mass retention. The investigators believe that a diet higher in protein (with an emphasis on dairy), but still within accepted healthy ranges, with higher dietary calcium may result in greater loss of body fat and retention of muscle than a diet with a conventional amount of protein and adequate calcium or a conventional amount of protein with little calcium (i.e. low dairy). Based on previous research, the investigators think that people with low calcium intakes to begin with would stand to benefit the most. There is also a good reason to think that the high protein/high calcium diet may result in greater reductions in blood cholesterol and blood sugar, both of which would reduce a person's risk for heart disease and diabetes.
The investigators will test this diet in premenopausal women who are overweight or obese. The investigators believe that this group is a good one to target for several reasons. First, women of this age who are overweight or obese are, if they continue to carry this excess weight, are at serious risk for developing chronic diseases such as heart disease, diabetes, and possibly cancer at an early age. Second, these women will often begin to gradually consume less dairy because many perceive dairy foods as fattening. Thus, if the investigators proposals are correct the investigators will hopefully be able to equip health professionals with a tried and tested, palatable, dietary strategy in a population segment who, because of their age, would benefit greatly were their disease risk to be reduced.
Detailed description
Overweight to obese female subjects, who are habitually low dairy consumers and between the ages of 19-45 years will be recruited from the McMaster University student and staff population and from the surrounding Hamilton area. At study entry, all subjects will be asked to complete a standard screening questionnaire to document their medical history, current medication use, physical activity level, smoking habits, and alcohol consumption. Subjects will also complete a calcium food frequency questionnaire. Before randomization and study commencement, baseline measures will be done. These include: anthropometrics, fasting blood samples, fasting urine sample, resting energy expenditure measures (REE), muscle and adipose biopsies, cardiovascular measures (blood pressure, heart rate, blood vessel stiffness and arterial elasticity) body composition (dual-energy x-ray absorptiometry [DXA]), and a 7-day baseline food record analysis. Also, subjects' strength and fitness will be assessed (1 repetition maximum (RM) and submaximal Astrand Test evaluations). During the study, fasting blood samples will also be taken at weeks 4, 8, 12 and 16, DXA will also be done at weeks 8 and 16, validated Body Image questionnaires will be filled out again t weeks 8 and 16, and body weight will be recorded every week. All other measures will be repeated after 16 weeks (1RM, Astrand Test, biopsies, cardiovascular measures, REE). Magnetic Resonance Imaging (MRI) will be carried out on a smaller portion of subjects on a voluntary basis at weeks 0 and 16. Apon completion of the baseline testing, subjects will be randomly assigned to one of the three intervention groups.
Part of the intervention will be in the form of 2 daily chocolate drinks (a post-exercise drink plus one extra drink per day). Drink composition will differ depending on which group subjects are randomized to. Drinks will be made to look and taste similar. In terms of the daily diets, the DairyPro (middle/second) group will employ the same macronutrient distribution as the Control (first) group but half the protein will be derived from dairy sources, with subjects being asked to consume, on top of their supplemental chocolate drink, 2 yogurts (100 g each). In the control group, protein will be derived from sources other than dairy. In the HiDairyPro (third) group, dietary protein will be manipulated so as to comprise twice as much dietary energy versus the other two groups (i.e., 30% of energy intake versus 15%). Protein (half of their daily requirement) will be derived from dairy protein by asking subjects to consume, on top of their supplemental chocolate drink, 1 serving (250 ml) of 1% regular milk, 4 yogurts (100 g each) and 2 pieces of cheese (21 g each).
Overview of supplemental drink composition and diet composition by group:
- Control (Con) - a group consuming twice daily drinks containing no dairy protein or calcium. Daily protein (15% total kcals) should be from non-dairy sources (i.e. meat, egg, fish, chicken, lentils, beans, wheat gluten).
- Dairy Protein Group (DairyPro) - a group consuming twice daily drinks containing 1% chocolate milk and at least half of their daily protein (15% total kcals) intake from dairy sources.
- High Dairy Protein Group (HiDairyPro) - a group consuming twice daily drinks containing 1% artificially sweetened chocolate milk along with a diet formulated to contain 30% (as opposed to only 15% in the Con and DairyPro groups) of their dietary energy from protein with at least half of that coming from dairy protein.
Subjects will meet with a study dietitian/nutritionist at the beginning and biweekly throughout the 16 weeks, and be provided with individual dietary counseling to reduce daily calories by 500 kcal/d. Subjects will be provided with template diet records, nutrition information sheets and macronutrient specific exchange lists to help with dietary compliance and to promote healthy food choices. The weight-reducing diets will have macronutrient and micronutrient profiles that are in accordance with the dietary regulations set forth by Canada's Food Guide and the dietary reference intakes (DRIs). The macronutrient profile of the 2 moderate protein groups (control and DairyPro) will be 15:30:55 (PRO:Fat:CHO), whereas the subjects in the High dairy protein group (HiDairyPro) will consume a profile of 30:30:40 (15% substitution of carbohydrate for protein). Subjects will consume all other food (aside from their designated drinks) in any manner they choose in accordance with the macronutrient profile of their respective randomization allocations. Adherence to the prescribed diet will be via collection of assigned biweekly food records, frequent contact with subjects, and regular dietary counseling sessions.
In addition, all subjects will be given a custom exercise prescription consisting of supervised resistance exercise and aerobic exercise. Intensity and duration of all exercise sessions will be monitored and energy expenditure quantified using portable, validated units that integrate accelerometry, heat flux and skin temperature. Exercise will take place in a supervised setting at McMaster University. Subjects will perform exercise 7d/wk and will exercise supervised 5d/wk (Mon - Fri). Resistance training sessions will take place 2x/week. During these sessions, subjects will engage in a circuit weightlifting routine using guided motion machines.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| Control | Experimental | Behavioral: Exercise - Aerobic and Resistance, Behavioral: Dietary - Caloric RestrictionA group consuming twice daily (post-exercise and in morning/afternoon) drinks containing no dairy protein or calcium. Daily protein intake (15% total kcals) should be from non-dairy sources (i.e. meat, egg, fish, chicken, wheat gluten). |
| Dairy Protein | Experimental | Behavioral: Exercise - Aerobic and Resistance, Behavioral: Dietary - Caloric RestrictionA group consuming twice daily drinks (post-exercise and morning) containing 1% chocolate milk (in 1.5 cup servings = 3 cups/d). Daily protein intake is set at 15% total kcals with ~8% coming from dairy sources. |
| High Dairy Protein | Experimental | Behavioral: Exercise - Aerobic and Resistance, Behavioral: Dietary - Caloric RestrictionA group consuming twice daily drinks of 1% artificially sweetened chocolate milk (in 1.5 cup servings = 3 cups/d). Their diet contains 30% protein (as opposed to only 15% in the Con and DairyPro groups) with at least 50% of that coming from dairy sources. |
Who may qualify
- Ages
- 19 to 45 years
- Sex
- Female only
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (5 listed)
- Healthy pre-menopausal females
- Body Mass Index (BMI) between 27-40 kg/m2
- Low dairy consumption (~<500 mg/d Ca2+)
- Sedentary lifestyle (i.e., exercise less than once/week)
- Regular menstrual cycle
Key exclusion criteria (10 listed)
- Allergy to dairy protein
- Lactose intolerance
- Vegan diet
- Pregnant
- Taking vitamin or mineral supplements
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Exercise - Aerobic and ResistanceSubjects will perform exercise (aerobic and resistance) 7d/wk and will exercise supervised 5d/wk. Exercise will be carried out to expend 250 kcals/day. Supervised resistance training sessions will take place 2 days/wk and aerobic exercise will take place every day. During the resistance exercise sessions, subjects will engage in a circuit weightlifting routine using guided motion machines. During the aerobic sessions, subjects may choose whatever exercise modality they like (e.g. walking on track or treadmill, biking, elliptical, etc.). Subjects will wear devices that measure energy expenditure to get a better idea of the intensity and duration needed to expend 250 kcals with their exercise machine/modality of choice. | Behavioural | Control, Dairy Protein, High Dairy Protein |
| Dietary - Caloric RestrictionSubjects will be counselled on their respective hypocaloric diets during the 16 wk period. Adherence to the prescribed diet will be assessed via collection of assigned food records (biweekly), frequent contact with subjects, and regular dietary counseling sessions. The daily dietary energy deficit will be 500 kcal per day based on the subjects' estimated daily caloric requirements (based on height, weight, age, sex), multiplied by a sedentary activity factor. Additionally, subjects will consume 2 drinks per day that will differ depending on their randomization allocation. Subjects in the Dairy Protein and High Dairy Protein group will be provided with dairy products (e.g. milk, cheese, yogurt) to consume on a weekly basis to help facilitate their prescribed dairy and dietary protein intake. | Behavioural | Control, Dairy Protein, High Dairy Protein |
Primary outcome
Fat mass, lean mass, bone mass (BMD, BMC), total mass (measured via DXA scan)
Time frame: Measured at weeks 0, 8 and 16
10 secondary outcomes
Blood sample analyses (lipids)
Time frame: Measured at weeks 0, 4, 8, 12 and 16
Muscle and adipose tissue biopsies
Time frame: Measured at weeks 0 and 16
Food record macronutrient and micronutrient analyses (7-day at beginning and end, and 3-day throughout intervention)
Time frame: Biweekly from weeks 0-16
Resting Energy Expenditure (metabolic cart determination).
Time frame: Measured at weeks 0 and 16
Fitness and strength measures (modified Astrand Test and 1 RM test)
Time frame: Measured at weeks 0 and 16
Blood sample analyses (Vitamin D [25OHD], PTH, A1c, glucose, insulin)
Time frame: Measured at weeks 0 and 16
Magnetic Resonance Imaging (MRI) *strictly on a voluntary basis
Time frame: Measured at weeks 0 and 16
Spot Urine Collection
Time frame: Measured at weeks 0 and 16
Body Image (Assessed with a validated questionnaire)
Time frame: Measured at weeks 0, 8 and 16
Cardiovascular Measures (Assessment of blood pressure, heart rate, blood vessel stiffness and arterial elasticity)
Time frame: Measured at weeks 0 and 16
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 20 Jul 2011.
- Derived from this study: PubMed 22049177Josse AR, Atkinson SA, Tarnopolsky MA, Phillips SM. Diets higher in dairy foods and dietary protein support bone health during diet- and exercise-induced weight loss in overweight and obese premenopausal women. J Clin Endocrinol Metab. 2012 Jan;97(1):251-60. doi: 10.1210/jc.2011-2165. Epub 2011 Nov 2.
- Derived from this study: PubMed 21775530Josse AR, Atkinson SA, Tarnopolsky MA, Phillips SM. Increased consumption of dairy foods and protein during diet- and exercise-induced weight loss promotes fat mass loss and lean mass gain in overweight and obese premenopausal women. J Nutr. 2011 Sep;141(9):1626-34. doi: 10.3945/jn.111.141028. Epub 2011 Jul 20.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Stuart M Phillips, Ph.D. principal investigator
Department of Kinesiology, McMaster University
Andrea R Josse, M.Sc. study director
Department of Kinesiology, McMaster University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Exercise - Aerobic and Resistance and Dietary - Caloric Restriction in people with Overweight and Obesity, run by McMaster University at 1 site in Canada.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 10 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 20 Jul 2011. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Canada. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Fat mass, lean mass, bone mass (BMD, BMC), total mass (measured via DXA scan) (time frame: Measured at weeks 0, 8 and 16). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00710398, which also lists 2 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 20 Jul 2011.