Resistance TrainingNCT07874776
Effects of Three Carbohydrate Beverages on Resistance Training Performance
A study testing Dextrose, Maltodextrin and Highly Branched Cyclic Dextrin in people with Resistance Training and Sports Nutrition, run by Istanbul Gelisim University at 1 site in Turkey (Türkiye).
Trial summary
This randomized, triple-blinded, counterbalanced crossover trial compared three carbohydrate beverages that provided the same amount of carbohydrate (30 g) but differed in carbohydrate source: dextrose, maltodextrin, and highly branched cyclic dextrin (HBCD). Read more about this study
- Who is it for?
- Any ageHealthy volunteers can take part
- Conditions the study is for
- Resistance Training, Sports Nutrition, Dietary Carbohydrates
- What is being tested?
- Dextrose, Maltodextrin and Highly Branched Cyclic Dextrin
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 38 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 4 May 2026to 8 Jun 2026
- Phase
- Interventional
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 Any age
- All sexes
- Healthy volunteers accepted
- Child, Adult, Older adult
Who may be able to join
- Student at the Faculty of Sports Sciences, Istanbul Gelisim University
- Active participation in competitive sports
- Regular resistance training
- Prior experience with multi-joint resistance exercises
- No musculoskeletal injuries during the six months preceding enrolment
Who cannot join
- Any acute or chronic disease
- Current musculoskeletal injury
- Any condition that could compromise safe participation in resistance exercise or influence performance, metabolic, or hormonal responses
- Inability to perform the exercises safely and consistently with the prescribed technique during familiarization
Trial locations and contacts
1 site in 1 country.
Turkey (Türkiye)1 site
Istanbul Gelisim University, Faculty of Sports Sciences
Istanbul, 34310
About this study
Official title: Effects of Three Isoenergetic Carbohydrate Beverages on Performance and Physiological Responses to Resistance Training: A Randomized, Triple-Blinded Crossover Trial
This randomized, triple-blinded, counterbalanced crossover trial compared three carbohydrate beverages that provided the same amount of carbohydrate (30 g) but differed in carbohydrate source: dextrose, maltodextrin, and highly branched cyclic dextrin (HBCD). Resistance-trained adults completed a familiarization session, a one-repetition maximum (1RM) testing session, and three experimental sessions separated by at least 7 days. In each experimental session, participants ingested one of the beverages in three 10-g servings and performed five sets of up to 15 repetitions at 62.5% of 1RM in the squat, bench press, and bench pull. Mechanical performance, blood glucose and lactate, perceived exertion, and gastrointestinal symptoms were assessed during or immediately after exercise; perceived recovery and muscle soreness at 24 and 48 hours; and serum creatine kinase and cortisol at 48 hours.
Read the detailed description
Participants were randomly allocated (RANDOM.ORG) to the six possible sequences of the three beverages in a counterbalanced manner. The allocation sequence was generated before data collection by a researcher not involved in testing, data collection, or statistical analyses. The beverages were matched for taste, color, and volume by an external researcher from a professional food laboratory (Life Pro Nutrition, Madrid, Spain) and delivered in identical containers coded 911, 912, and 913; the key linking codes to beverages was held by this researcher until all statistical analyses had been completed. The total dose (30 g) was divided into three servings of 10 g, each dissolved in 100 mL of water, ingested 15 minutes after the warm-up (immediately before the squat) and immediately after the squat and bench press exercises. Participants arrived after a minimum 6-hour fast, maintained their habitual diet, avoided strenuous exercise for 48 hours, and refrained from caffeine or other stimulants for 8 hours before testing. Barbell velocity was recorded with a linear position transducer (GymAware RS). Capillary blood glucose and lactate were measured 90 seconds into the 5-minute rest after each exercise; venous blood for creatine kinase and cortisol was collected 48 hours after the session.
- Conditions
- Resistance Training, Sports Nutrition, Dietary Carbohydrates
- Being tested
- Dextrose, Maltodextrin, Highly Branched Cyclic Dextrin
- Keywords
- highly branched cyclic dextrin, maltodextrin, dextrose, carbohydrate supplementation, velocity-based training, blood glucose, cortisol, creatine kinase
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
DextroseDietary supplement
Dextrose (Life Pro Nutrition, Madrid, Spain): 30 g in total, divided into three 10-g servings each dissolved in 100 mL of water, ingested 15 minutes after the warm-up (immediately before the squat) and immediately after the squat and bench press exercises. Matched for taste, color, and volume with the other beverages.
MaltodextrinDietary supplement
Maltodextrin DE15-18 (Sandek #150, Sanwa Starch Co., Ltd, Nara, Japan): 30 g in total, divided into three 10-g servings each dissolved in 100 mL of water, ingested 15 minutes after the warm-up (immediately before the squat) and immediately after the squat and bench press exercises. Matched for taste, color, and volume with the other beverages.
Highly Branched Cyclic DextrinDietary supplement
Highly branched cyclic dextrin (Cluster Dextrin, Glico Nutrition Co., Ltd, Osaka, Japan): 30 g in total, divided into three 10-g servings each dissolved in 100 mL of water, ingested 15 minutes after the warm-up (immediately before the squat) and immediately after the squat and bench press exercises. Matched for taste, color, and volume with the other beverages.
| Study group | Role | What they receive |
|---|---|---|
| Dextrose | Experimental | Participants ingested 30 g of dextrose, divided into three 10-g servings each dissolved in 100 mL of water, during a standardized high-volume resistance training session (squat, bench press, bench pull; five sets of up to 15 repetitions at 62.5% of 1RM). Receives: Dietary Supplement: Dextrose |
| Maltodextrin | Experimental | Participants ingested 30 g of maltodextrin (DE15-18), divided into three 10-g servings each dissolved in 100 mL of water, during a standardized high-volume resistance training session (squat, bench press, bench pull; five sets of up to 15 repetitions at 62.5% of 1RM). Receives: Dietary Supplement: Maltodextrin |
| Highly Branched Cyclic Dextrin | Experimental | Participants ingested 30 g of highly branched cyclic dextrin (HBCD), divided into three 10-g servings each dissolved in 100 mL of water, during a standardized high-volume resistance training session (squat, bench press, bench pull; five sets of up to 15 repetitions at 62.5% of 1RM). Receives: Dietary Supplement: Highly Branched Cyclic Dextrin |
What is being measured
The primary outcome is the main question the study is designed to answer.
Fastest Mean Concentric Velocity per Set (MVfastest)
Fastest mean concentric barbell velocity (m/s) recorded within each of five sets of the squat, bench press, and bench pull, measured with a linear position transducer (GymAware RS), compared among the three beverage conditions.
Measured: From the first beverage serving (immediately before the squat) to completion of the bench pull, approximately 60 minutes, in each of the three experimental sessions
Secondary outcomes (9)
Number of Repetitions Completed per Set
Number of repetitions completed in each of five sets (up to 15 repetitions at 62.5% of one-repetition maximum) of the squat, bench press, and bench pull, compared among the three beverage conditions.
Measured: From the first beverage serving (immediately before the squat) to completion of the bench pull, approximately 60 minutes, in each of the three experimental sessions
Capillary Blood Glucose Concentration
Fingertip capillary blood glucose concentration (mg/dL) measured with a portable glucose monitoring system (Contour Plus Elite).
Measured: 90 seconds into the 5-minute rest after the squat, bench press, and bench pull in each of the three experimental sessions
Capillary Blood Lactate Concentration
Fingertip capillary blood lactate concentration (mmol/L) measured with a portable lactate analyzer (Lactate Scout 4).
Measured: 90 seconds into the 5-minute rest after the squat, bench press, and bench pull in each of the three experimental sessions
Rating of Perceived Exertion
Perceived exertion rated on a modified 1-10 Rating of Perceived Exertion (RPE) scale; higher scores indicate greater exertion.
Measured: 5 minutes after completion of the resistance exercise protocol in each of the three experimental sessions
Gastrointestinal Symptoms
Stomach fullness, nausea, and abdominal cramping, each rated on an individual 1-10 scale.
Measured: 5 minutes after completion of the resistance exercise protocol in each of the three experimental sessions
Perceived Recovery Status
Perceived recovery rated on the 0-10 Perceived Recovery Status (PRS) scale; higher scores indicate better perceived recovery.
Measured: 24 hours and 48 hours after each of the three experimental sessions
Muscle Soreness
Muscle soreness rated on a 0-10 visual analogue scale (VAS); higher scores indicate greater soreness.
Measured: 24 hours and 48 hours after each of the three experimental sessions
Serum Creatine Kinase Activity
Serum creatine kinase activity (U/L) determined by an enzymatic method (cobas c 501 analyzer) from venous blood.
Measured: 48 hours after each of the three experimental sessions
Serum Cortisol Concentration
Serum cortisol concentration (µg/dL) determined by electrochemiluminescence immunoassay (cobas e 801 analyzer) from venous blood.
Measured: 48 hours after each of the three experimental sessions
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted15 Oct 2026
- Study start4 May 2026
- Primary completion8 Jun 2026
- Study completion8 Jun 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Resistance TrainingStudies of the same condition, open and under way.
- 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
- Other
- Allocation
- Randomised
- Intervention model
- Crossover
- Model description
- Each participant completed three experimental sessions, one with each beverage, in a randomized counterbalanced order (six possible sequences), with at least 7 days between sessions.
- Masking
- Triple blind
- Who is masked
- Participant, Investigator, Outcomes assessor
- Enrolment
- 38 participants (actual)
Sponsor and investigators
- Lead sponsor
- Istanbul Gelisim University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Deniz ŞENTÜRK, Istanbul Gelisim University
- Investigators
- Deniz Şentürk, PhD, Principal investigator, Istanbul Gelisim University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07874776
- Sponsor's protocol ID
- 2026-04-11
- Other IDs
- TGA-2026-451
- Status last verified
- Oct 2026
- First submitted
- 27 Sep 2026
- Last updated
- 15 Oct 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes: Individual participant data underlying the published results will be available from the corresponding author upon reasonable request.