Carbohydrate Metabolism Clinical Trial
Official title:
Effect of Glycogen Replenishment on Time Trial Performance Following a Glycogen Lowering Exercise
Fifteen endurance-trained male/female will be randomly assigned to do four exercise and nutrition trials involving ingestion of four different concentrations of sweet corn derived starch (food component) in water (0, 1, 1.5 and 2 g. kg-1. h-1). Each trial will be separated by at least one week. During these four experimental trials athletes will be subjected to a glycogen-lowering cycling exercise protocol followed by a 4-h post-exercise recovery period (2h feeding then 2 hours of rest). At the end of 4-h period they will do a 20 kilometre time trial test on a stationary bike in a laboratory condition to measure the effect of different glycogen repletion rates on exercise performance.
Status | Recruiting |
Enrollment | 15 |
Est. completion date | September 30, 2019 |
Est. primary completion date | September 30, 2019 |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | All |
Age group | 18 Years to 40 Years |
Eligibility |
Inclusion Criteria: - are a healthy male or female endurance athlete of 18- 40 years of age - have =2 y endurance training experience; training for ?1 h/day Exclusion Criteria: - Have symptoms or take medication for respiratory disease - Have symptoms or take medication for cardiovascular disease - Have symptoms or take medication for metabolic disease - Have symptoms or take mediation for neuromuscular disease - Use heart rate or blood pressure medications - Use any medications with side effects of dizziness, lack of motor control, or slowed reaction time - Have any cardiovascular or neuromuscular limitations to exercise - Are pregnant or find out that you are pregnant during experiment |
Country | Name | City | State |
---|---|---|---|
Canada | Exercise Nutrition Laboratory (Western University) | London | Ontario |
Lead Sponsor | Collaborator |
---|---|
Western University, Canada |
Canada,
Ivy JL. Glycogen resynthesis after exercise: effect of carbohydrate intake. Int J Sports Med. 1998 Jun;19 Suppl 2:S142-5. — View Citation
Upshaw AU, Wong TS, Bandegan A, Lemon PW. Cycling Time Trial Performance 4 Hours After Glycogen-Lowering Exercise Is Similarly Enhanced by Recovery Nondairy Chocolate Beverages Versus Chocolate Milk. Int J Sport Nutr Exerc Metab. 2016 Feb;26(1):65-70. doi — View Citation
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | 20 km time trial | participants will ride for 20 km on a stationary bike and time to finish will be measured | 40 minutes | |
Secondary | VO2 | VO2 will be measured using a metabolic cart | 2 hours | |
Secondary | Blood glucose | glucose will be measured using glucometer | 2 hours | |
Secondary | VCO2 | VCO2 will be measured using a metabolic cart | 2 hours | |
Secondary | Serum insulin | Insulin will be measured using an immumoassay kit | 2 hours | |
Secondary | Blood lactate | blood lactate will be measured using lactate meter | 2 hours |
Status | Clinical Trial | Phase | |
---|---|---|---|
Recruiting |
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