Summary .— This study assessed whether video self-modeling improves running performance and infl uences the rate of perceived exertion and heart rate response. Twelve men ( M age = 26.8 yr., SD = 6; M body mass index = 22.1 kg.m –2 , SD = 1) performed a time to exhaustion running test at 100 percent maximal aerobic velocity while focusing on a video self-modeling loop to synchronize their …