title: Effects of a Low-Load Gluteal Warm-Up on Explosive Jump Performance.
abstract: The purpose of this study was to investigate the effects of a low-load gluteal warm-up protocol on countermovement and squat jump performance. Research by Crow et al. (2012) found that a low-load gluteal warm-up could be effective in enhancing peak power output during a countermovement jump. Eleven subjects performed countermovement and squat jumps before and after the gluteal warm-up protocol. Both jumps were examined in separate testing sessions and performed 30 seconds, and 2, 4, 6 & 8 minutes post warm-up. Height jumped and peak ground reaction force were the dependent variables examined in both jumps, with 6 additional variables related to fast force production being examined in the squat jump only. All jumps were performed on a force platform (AMTI OR6-5). Repeated measures analysis of variance found a number of significant differences (p ≤ 0.05) between baseline and post warm-up scores. Height jumped decreased significantly in both jumps at all rest intervals excluding 8 minutes. Improvement was seen in 7 of the 8 recorded SJ variables at the 8 minute interval. Five of these improvements were deemed statistically significant, namely time to peak GRF (43.0%), and time to the maximum rate of force development (65.7%) significantly decreased, while starting strength (63.4%), change of force in first 100 ms of contraction (49.1%) and speed strength (43.6%) significantly increased. The results indicate that a gluteal warm-up can enhance force production in squat jumps performed after 8 minutes recovery. Future research in this area should include additional warm-up intervention groups for comparative reasons.
authors.affiliation: Biomechanics Research Unit, University of Limerick, Limerick, Ireland. ; Irish Institute of Sport, Abbotstown, Dublin 15, Ireland.
authors.forename: Thomas
authors.initials: T
authors.lastname: Comyns
authors.affiliation: Biomechanics Research Unit, University of Limerick, Limerick, Ireland.
authors.forename: Ian
authors.initials: I
authors.lastname: Kenny
authors.affiliation: Biomechanics Research Unit, University of Limerick, Limerick, Ireland.
authors.forename: Gerard
authors.initials: G
authors.lastname: Scales
keywords: counter movement jump; plyometrics; rate of force development; rest interval; speed strength; squat jump