None (Healthy adults)
Conditions
Interventions
Low-GI group Pre-exercise intake of low-glycemic index (GI) food containing 1.5 g of available carbohydrates per kg of body weight, 2 hours before practice. The amount is individually adjusted accord
Sponsors
Niigata University
Eligibility
Sex/Gender
Male
Inclusion criteria
Inclusion criteria: Healthy male college basketball players aged 18 to 25 who practice at least four times per week. Participants are recommended by the team coach, but a study staff member with no conflict of interest will provide full explanation. Participation is voluntary, and refusal to participate will not result in any disadvantage.
Exclusion criteria
Exclusion criteria: Participants will be excluded if they have an injury impairing exercise function during the study period, a history of abnormal glucose metabolism on past health examinations, a food allergy to rice or barley, or cardiovascular disease. Female athletes will also be excluded because variations in blood glucose associated with the menstrual cycle may affect measurement accuracy during the study period.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Changes in exercise performance following pre-exercise nutritional supplements with different glycemic indices (vertical jump height, 20-m sprint time, pro-agility shuttle time, and three-point shooting success rate). The pre- to post-practice differences under each condition will be evaluated. | — |
Secondary
| Measure | Time frame |
|---|---|
| 1. Changes in blood glucose levels (Continuous glucose monitoring using FreeStyle Libre 2, from pre-intake to the end of practice) 2. Rating of perceived exertion (RPE) 3. Changes in heart rate 4. Gastrointestinal symptoms (e.g., satiety and gastric discomfort) | — |
Countries
Japan
Contacts
Public ContactTomoyo Usami
Niigata University, Niigata University of Management Graduate School of Science and Technology/ Faculty of Management and Information Science
Outcome results
None listed