Ten exercise trained male athletes (18-35 years) will complete a repeated testing protocol under 2 experimental conditions in a systematically rotated blind crossover design: BSD and isoenergetic carbohydrate control, separated by 1 week. The testing protocol will consist of sprint interval exercise (4-repeated Wingate cycle tests, resistance at 10% body mass separated by 4 min recovery bouts, followed by 4 muscular fatigue and 2 cognitive function tests).