title: Effect of postactivation potentiation on fifty-meter freestyle in national swimmers.
abstract: The purpose of this study was to examine the effect of PAP on 50-m freestyle in national-level swimmers. Four warm-ups were compared: a traditional race-specific warm-up (RSWU), upper-body PAP (UBPAP), lower-body PAP (LBPAP), and combined PAP warm-up (CPAP). Eighteen (10 men, 8 women) national-level swimmers participated in this study, which included 7 separate testing sessions. Participants' 3 repetition maximum (3RM) of the pull-up (PU) was established in session 1. In session 2, rest periods for muscle enhancement of the upper body were determined using a medicine ball throw test 4, 8, and 12 minutes after UBPAP stimulus (1 × 3RM of the PU). In session 3, swimmers performed a countermovement jump 4, 8, and 12 minutes after LBPAP stimulus (1 × 5 jumps to a box while carrying 10% of the participants' body weight). The 50-m freestyle tests were performed on sessions 4-7, preceded by each warm-up protocol and corresponding rest periods. A repeated-measures analysis of variance (p ≤ 0.05) and Bonferroni post hoc test revealed that RSWU elicited faster swimming times than UBPAP (29.00 ± 2.05 vs. 29.36 ± 1.88 seconds, p = 0.046). Additionally, when data were split into gender, in the male group, the UBPAP elicited significantly slower times than RSWU (27.51 ± 1.06 vs. 28.01 ± 1.17 seconds, p = 0.047) and CPAP (27.49 ± 1.12 vs. 28.01 ± 1.17 seconds, p = 0.02). These findings suggest individualized PAP warm-up may be a valuable tool to enhance performance in sprint events, particularly in male swimmers. However, the PU may not be an appropriate PAP stimulus on its own.
authors.affiliation: London Sports Institute, Middlesex University, London, United Kingdom.
authors.forename: Victor G
authors.initials: VG
authors.lastname: Sarramian
authors.forename: Anthony N
authors.initials: AN
authors.lastname: Turner
authors.forename: Andrew K
authors.initials: AK
authors.lastname: Greenhalgh
mesh_terms: D000293:Adolescent; D054874:Athletic Performance / Q000502:physiology*; D005260:Female; D006801:Humans; D035002:Lower Extremity; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology*; D013550:Swimming / Q000502:physiology*; D060726:Torso; D034941:Upper Extremity; D063996:Warm-Up Exercise / Q000502:physiology*