The purpose of this study is to determine whether glucose-fructose intake during training increases lactate transport and oxidation and improve endurance performance.

The study will enroll 24 healthy male volunteers. After baseline assessment of lactate transport and endurance performance, subjects will be randomized to either a 3-week intervention arm in which they will train with glucose-fructose intake during training, or to a control arm (water during training). After this 3-week intervention, lactate transport and endurance performance will be assessed again.

Inclusion Criteria:

• healthy
• age between 18 and 30 years
• sedentary
• BMI between 19 and 25
• blood pressure lower than 140/90 mmHg

Exclusion Criteria:

• smoking
• consumption of more than 10g alcohol per day
• cardiovascular history
• electrographic abnormalities at rest
• consumption of more than one can of soda per day or more than 60g sugars per day
• any current drug treatment
• consumption of drugs or illicit substances
• diabetes mellitus
• vegetarian
• food intolerance
• blood donation or participation to another study <3 months before study inclusion