Fig 5. Effect of prior mental exertion on heart rate during the 20-min time trial in professional (n = 10) and recreational (n = 9) road cyclists.
§ Significant group x time interaction (p < 0.05). # Significant main effects of time in professional and recreational cyclists (p < 0.05). † Significant simple main effects of group (p < 0.05). Data are presented as mean ± SEM.