Choice reaction time
A significant main effect was detected for CRT between supplements (Post hoc tests revealed CRT to be significantly lower before exercise following guarana supplementation (407 (
Mean and individual choice reaction time (CRT) before and after exercise. *Signifies a significant difference (After exercise (including when only the correct responses were selected), post hoc tests revealed no differences between supplements (There were no differences in response accuracy percentage between placebo, guarana and caffeine (Therefore, guarana supplementation significantly reduced CRT response time compared with placebo following 30 min of rest, but there were no differences between supplements after exercise.