Abstract
The purpose of this study was to investigate the benefit of post-activation performance enhancement (PAPE) after accentuated eccentric loading (AEL) compared to traditional resistance loading (TR). Sixteen male volleyball athletes were divided in AEL and TR group. AEL group performed 3 sets of 4 repetitions (eccentric: 105% of concentric 1RM, concentric: 80% of concentric 1RM) of half squat, and TR group performed 3 sets of 5 repetitions (eccentric & concentric: 85% of 1RM). Countermovement jump (CMJ), spike jump (SPJ), isometric mid-thigh pull (IMTP), and muscle soreness test were administered before (Pre) exercise, and 10 min (10-min), 24 h (24-h), and 48 h (48-h) after exercise. A two-way repeated measures analysis of variance was used to analyze the data. Peak force and rate of development (RFD) of IMTP in AEL group were significantly greater (p < 0.05) than TR group. The height, peak velocity, and RFD of CMJ, height of SPJ, and muscle soreness showed no interaction effects (p > 0.05) groups x time. AEL seemed capable to maintain force production in IMTP, but not in CMJ and SPJ. It is recommended the use of accentuated eccentric loading protocols to overcome the fatigue.
Highlights
Vertical jumping is a critical ability in volleyball and is related to serving, spiking, or blocking
The potentiating effects of accentuated eccentric loading (AEL) seem to be elicited to counterbalance the fatigue at least for 48 h, which could be translated into implications for the training prescription and return to play strategies
This study aimed to investigate the long-lasting potentiating effects 10 min after the conditioning activity, the change of the Post-activation potentiation (PAP) effect that occurred within 10 min could not be investigated
Summary
Vertical jumping is a critical ability in volleyball and is related to serving, spiking, or blocking. Traditional resistance training (TR) consists of lifting (concentric) and lowering (eccentric) an identical externally imposed load, and it prescribes equivalent absolute loads for the concentric and eccentric action of an exercise [3,4]. This traditional approach might not provide an optimal stimulus during the eccentric phase of lifting [4]. Loads encountered in TR exercise are limited by concentric strength, leading trainers or practitioners to seek alternative training methods to increase the strength and force production ability of eccentric muscle action, and to improve specificity and utilization of stretch-shortening cycle [4].
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