Effect of Post-Activation Potentiation on Sprint Performance after Combined Electromyostimulation and Back Squats

Post-activation potentiation (PAP) is a phenomenon which can improve force performance executed after previous conditioning activity. PAP usually evoked through heavy resistance, but many new methods are being suggested that acutely in post-activation protocols. The purpose of this study was to examine the effect simultaneous application Smith machine back squats (BS) with electromyostimulation (EMS) on sprint performance. Sixteen male (age = 22.9 ± 2.3 years, body mass 79.9 13.8 kg, BS one-repetition maximum (1 RM) 120.5 17.3) amateur football and rugby players volunteered for study. Participants randomly performed protocols (CON no load, 3 × 85% 1 RM BS, EMS weightless squat electric current + current) four different days at least 48 h intervals. rested passively 7 min preloads 30 m test. Sprint times 10 were recorded each condition. As result, significant difference found (p 0.13) 0.10) between preload size be trivial (ηp2: 0.13 m; ηp2: 0.11 m). In individual results, five participants two decreased EMS, or conditions compared CON. No other observed. conclusion, did not affect players. It said applied physical exertion alone may cause fatigue some individuals.