AzTrials
AzTrials

Overweight and ObesityNCT03904810

Low-frequency High-Intensity Interval Training in Overweight or Obese Young Adults

A study testing Exercise intervention in people with Overweight and Obesity, run by The University of Hong Kong at 1 site in Hong Kong.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
Search all trials

Trial summary

Background: The relationship between the frequency of high-intensity interval training (HIIT) and the resultant adaptations is largely unclear. Purpose: This study examined the effects of different frequencies of HIIT compared to moderate-intensity continuous training (MICT) on body composition and cardiovascular… Read more about this study

Who is it for?
Ages 18 to 30 years, men only
Conditions the study is for
Overweight and Obesity
What is being tested?
Exercise intervention
Could I receive a placebo?
No, everyone receives an active treatment
How many people
103 participants
Where
1 siteHong Kong
Study dates
1 Oct 2016to 31 Aug 2017
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 18 to 30 years
  • Men only
  • No healthy volunteers
  • Adult

Who may be able to join

  • Chinese male
  • Aged 18-30 years
  • Overweight or obesity, defined as BMI ≥23 kg/m2 (classification of overweight for Hong Kong adults according to Department of Health, Hong Kong SAR Government)

Who cannot join

  • Chronic medical and health condition such as cardiovascular diseases, diabetes, neurological disease, musculoskeletal disorder, cancers, and autoimmune diseases
  • Hypertension (blood pressure >140/90 mmHg)
  • Contraindications to participating in physical exercise
  • Any pre-existing medical or physical issues that affected the experimental test
  • Physically active (i.e., >3 hours of moderate-intensity exercise weekly)
  • Lean overweight population (BMI ≥23 kg/m2, but percent body fat ≤20%) according to the BMI data corresponding to bioelectrical impedance estimated percent body fat cut-off value among Hong Kong Chinese adults.

Trial locations and contacts

1 site in 1 country.

Hong Kong1 site
  • LKS Faculty of Medicine

    Hong Kong

Other trials in Hong Kong

About this study

Official title: The Effectiveness of Low-frequency High-Intensity Interval Training (HIIT) in Overweight or Obese Young Adults

Background: The relationship between the frequency of high-intensity interval training (HIIT) and the resultant adaptations is largely unclear. Purpose: This study examined the effects of different frequencies of HIIT compared to moderate-intensity continuous training (MICT) on body composition and cardiovascular biomarkers in overweight or obese adults. Methods: This study was a randomized, controlled, single-blinded trial. Fifty-six overweight or obese men aged between 18 and 30 years were randomly assigned to no-intervention control (CON; n=14), MICT performed thrice weekly (MICT×3/wk; n=9), HIIT performed thrice weekly (HIIT×3/wk; n=14), HIIT performed twice weekly (HIIT×2/wk; n=10), and HIIT performed once weekly (HIIT×1/wk; n=9). Each HIIT session consisted of 12 × 1-min bouts at 90% heart rate reserve (HRR), interspersed with 11 × 1-min bouts at 70% HRR (HIIT×3/wk: 69 min/wk; HIIT×2/wk: 46 min/wk; HIIT×1/wk: 23 min/wk). Aerobic capacity, resting heart rate, body composition, waist circumference, blood pressure, endothelial function, fasting blood glucose and lipids, circulatory adipokines and inflammatory biomarkers were examined at baseline, after 4 weeks and 8 weeks of intervention.

Read the detailed description

Individuals who fulfilled the following inclusion criteria were invited to participate in the present study: 1) Chinese male; 2) aged 18-30 years; and 3) overweight or obesity, defined as BMI ≥23 kg/m2 (classification of overweight for Hong Kong adults according to Department of Health, Hong Kong SAR Government) (13). Subjects were excluded if they had: 1) chronic medical and health condition such as cardiovascular diseases, diabetes, neurological disease, musculoskeletal disorder, cancers, and autoimmune diseases; 2) hypertension (blood pressure >140/90 mmHg); 3) contraindications to participating in physical exercise; 4) any pre-existing medical or physical issues that affected the experimental test; 5) physically active (i.e., >3 hours of moderate-intensity exercise weekly) or 6) lean overweight population (BMI ≥23 kg/m2, but percent body fat ≤20%) according to the BMI data corresponding to bioelectrical impedance estimated percent body fat cut-off value among Hong Kong Chinese adults.

Of those who were screened, 103 Chinese young adults were eligible to participate in this study. They were provided with written and verbal information on the study protocol and the possible associated discomforts and risks followed by obtaining their written informed consent to participate in this study. The study protocol and consent form were approved by the Human Subjects Ethics Sub-Committee of The Hong Kong Polytechnic University (ethics approval reference number: HSEARS20160927005-01).

This study was a single-blind, randomized, controlled trial. Subjects were randomly assigned to 1) no-intervention control (CON), 2) MICT performed thrice weekly (MICTx3/wk), 3) HIIT performed thrice weekly (HIITx3/wk), 4) twice weekly (HIITx2/wk), and 5) once weekly (HIITx1/wk). All subjects were instructed to maintain their usual daily activities. Outcome measures including aerobic capacity, body composition, blood pressure, resting heart rate, endothelial function, arterial stiffness, fasting glucose, lipids markers, adipokine marker, and inflammatory marker were assessed at baseline, 4 weeks and 8 weeks after the intervention.

Being tested
Exercise intervention
Keywords
HIIT, Exercise frequency, Exercise intensity
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 interventionBehavioural

    HIIT groups performed 30-meter shuttle runs on a rooftop covered field whereas MICT group ran on a footpath with an overall flat and non-slippery road surface. All training sessions were preceded by a 5-minute self-pace warm-up jogging and ended with a 5-minute self-pace jogging or walking cool-down. Each session of MICT consisted of 30 minutes of continuous exercise at an intensity of 60% of heart rate reserve (HRR); [i.e., (maximal HR - resting HR) × intensity + resting HR]. For each HIIT session, the intensity was set at 90% HRR for high-intensity bouts, interspersed with active recovery at 70% HRR. All exercise sessions were supervised by qualified athletic coach or strength and conditioning coach.

Study groups in NCT03904810
Study groupRoleWhat they receive
ControlNo interventionSubjects in this group do not received any intervention
Moderate Intensity Continuous Training ×3/wkActive comparatorSubjects in this group will receive three sessions of Moderate-Intensity Continuous Training per week throughout the 8 weeks experimental period
Receives: Behavioral: Exercise intervention
High Intensity Interval Training×3/wkActive comparatorSubjects in this group will receive three sessions of High-Intensity Interval Training per week throughout the 8 weeks experimental period
Receives: Behavioral: Exercise intervention
High Intensity Interval Training×2/wkActive comparatorSubjects in this group will receive two session of High-Intensity Interval Training per week throughout the 8 weeks experimental period
Receives: Behavioral: Exercise intervention
High Intensity Interval Training×1/wkActive comparatorSubjects in this group will receive one session of High-Intensity Interval Training per week throughout the 8 weeks experimental period
Receives: Behavioral: Exercise intervention

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Estimated maximal oxygen consumption

    Estimated maximal oxygen consumption achieved during the 20-meter shuttle multistage run test were used for the assessment of aerobic fitness Unit: body weight, estimated oxygen consumption and minute will be combined to report the estimated VO2max in ml/kg/min.

    Measured: 8 weeks

  2. Total running distance

    Total running distance in meters achieved during the 20-meter shuttle multistage run test were used for the assessment of aerobic fitness

    Measured: 8 weeks

  3. Total body fat percentage

    Total body fat percentage were assessed by a bioelectrical impedance analyzer (BC-418, Tanita, Japan).

    Measured: 8 weeks

  4. Total body fat mass

    Total body fat mass in kg were assessed by a bioelectrical impedance analyzer (BC-418, Tanita, Japan).

    Measured: 8 weeks

  5. Total body fat-free mass percentage

    Total body fat-free mass percentage were assessed by a bioelectrical impedance analyzer (BC-418, Tanita, Japan).

    Measured: 8 weeks

  6. Total fat-free mass

    Total body fat-free mass were assessed by a bioelectrical impedance analyzer (BC-418, Tanita, Japan).

    Measured: 8 weeks

  7. Trunk fat mass

    Trunk fat mass in kg were assessed by a bioelectrical impedance analyzer (BC-418, Tanita, Japan).

    Measured: 8 weeks

  8. Body weight

    Body weight in kg were assessed by a bioelectrical impedance analyzer (BC-418, Tanita, Japan).

    Measured: 8 weeks

  9. Body height

    Body height in meter were assessed.

    Measured: 8 weeks

  10. Body mass index (BMI)

    Weight and height will be combined to report BMI in kg/m^2

    Measured: 8 weeks

  11. Waist circumference

    Waist circumference was determined to the nearest 0.1 cm of a contact tension tape. The tape was applied directly to the skin at the mid-point between the lower margin of the last palpable rib and the top of the iliac crest.

    Measured: 8 weeks

Secondary outcomes (16)
  1. Systolic blood pressure

    Systolic blood pressure was determined by an electronic sphygmomanometer (Accutorr Plus, Datascope, USA)

    Measured: 8 weeks

  2. Diastolic blood pressure

    Diastolic blood pressure was determined by an electronic sphygmomanometer (Accutorr Plus, Datascope, USA)

    Measured: 8 weeks

  3. Mean arterial pressure

    Mean arterial pressure was determined by an electronic sphygmomanometer (Accutorr Plus, Datascope, USA)

    Measured: 8 weeks

  4. Resting heart rate

    Resting heart rate was determined by an electronic sphygmomanometer (Accutorr Plus, Datascope, USA)

    Measured: 8 weeks

  5. Endothelial function

    Endothelial function were measured by digital plethysmography using EndoPAT 2000 device (ITAMAR Medical, Caesarea, Israel) and expressed as natural log reactive hyperemia index (LnRHI)

    Measured: 8 weeks

  6. Arterial stiffness

    Arterial stiffness were measured by digital plethysmography using EndoPAT 2000 device (ITAMAR Medical, Caesarea, Israel) and expressed as augmentation index normalized to heart rate of 75 bpm (AI@75)

    Measured: 8 weeks

  7. Serum fasting glucose

    Fresh blood samples were sent to an accredited medical laboratory to measure the serum fasting glucose concentrations by commercial test kit methods with an automatic clinical chemistry analyzer (Architect CI8200, Abbott Diagnostics, USA)

    Measured: 8 weeks

  8. Triglycerides

    Fresh blood samples were sent to an accredited medical laboratory to measure the serum triglycerides concentrations by commercial test kit methods with an automatic clinical chemistry analyzer (Architect CI8200, Abbott Diagnostics, USA)

    Measured: 8 weeks

  9. High-density lipoproteins (HDL) cholesterol

    Fresh blood samples were sent to an accredited medical laboratory to measure the serum high-density lipoproteins-cholesterol (HDL-C) concentrations by commercial test kit methods with an automatic clinical chemistry analyzer (Architect CI8200, Abbott Diagnostics, USA)

    Measured: 8 weeks

  10. Low-density lipoprotein (LDL) cholesterol

    Low-density lipoprotein (LDL) cholesterol in serum was measured by an automatic chemistry analyzer (AU-480, Beckman Coulter, USA)

    Measured: 8 weeks

  11. Interleukin 6

    Commercially available enzyme-linked immunosorbent assay kits (R\&D systems, Minneapolis, MN) were used to determine interleukin 6

    Measured: 8 weeks

  12. Tumor necrosis factor alpha

    Commercially available enzyme-linked immunosorbent assay kits (R\&D systems, Minneapolis, MN) were used to determine tumor necrosis factor alpha

    Measured: 8 weeks

  13. C-reactive protein

    Commercially available enzyme-linked immunosorbent assay kits (R\&D systems, Minneapolis, MN) were used to determine c-reactive protein

    Measured: 8 weeks

  14. Adiponectin

    Commercially available enzyme-linked immunosorbent assay kits (R\&D systems, Minneapolis, MN) were used to determine adiponectin

    Measured: 8 weeks

  15. Intercellular adhesion molecule-1

    Commercially available enzyme-linked immunosorbent assay kits (R\&D systems, Minneapolis, MN) were used to determine intercellular adhesion molecule-1

    Measured: 8 weeks

  16. Vascular cell adhesion molecule-1

    Commercially available enzyme-linked immunosorbent assay kits (R\&D systems, Minneapolis, MN) were used to determine vascular cell adhesion molecule-1

    Measured: 8 weeks

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted5 Apr 2019
  2. Study start1 Oct 2016
  3. Primary completion31 Aug 2017
  4. Study completion31 Aug 2017

Resources

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
Model description
5 groups ×3 times factorial design
Masking
Single blind
Who is masked
Participant
Enrolment
103 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03904810
Sponsor's protocol ID
HIIT001
Status last verified
Apr 2019
First submitted
31 Mar 2019
Last updated
5 Apr 2019
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A study testing Exercise intervention in people with Overweight and Obesity, run by The University of Hong Kong at 1 site in Hong Kong.

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 3 inclusion and 6 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 5 Apr 2019. 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 Hong Kong. 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?

Estimated maximal oxygen consumption (time frame: 8 weeks). The study lists 11 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
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 5 Apr 2019.

Free account

Log in to keep searching

You’ve used your 3 free searches. AzTrials is free: log in or create a free account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in