Increased Fatigue Response to Augmented Deceptive Feedback during Cycling Time Trial

Purpose: This study aimed to investigate the effect of different magnitudes of deception on performance and exercise-induced fatigue during cycling time trial. Methods: After three familiarization visits, three women and eight men performed three 5-km cycling time trials while following a simulated dynamic avatar reproducing either 100% (5K100%), 102% (5K102%), or 105% (5K105%) of the subject's previous fastest trial. Quadriceps muscle activation was quantified with surface electromyography. Fatigue was quantified by preexercise to postexercise (10 s through 15 min recovery) changes in quadriceps maximal voluntary contraction (MVC) force, potentiated twitch force evoked by electrical femoral nerve stimulation (QTSingle) and voluntary activation (VA, twitch interpolation technique). Results: Greater quadriceps muscle activation in 5K102% versus 5K100% (12% ± 11%) was found in parallel with a 5% ± 2% and 2% ± 1% improvement in power output and completion time, respectively (P

from Sports Medicine via xlomafota13 on Inoreader http://ift.tt/2uDo2Zu
via IFTTT