Does the warm-up effect subsequent post activation performance enhancement?
- Authors: O'Grady, Mathew , Young, Warren , Talpey, Scott , Behm, David
- Date: 2021
- Type: Text , Journal article
- Relation: The Journal of Sport and Exercise Science Vol. 5, no. 4 (SESN 2021), p.
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- Description: The purpose of the following study was first to identify an optimal warm-up to maximise countermovement jump (CMJ) performance, and second to investigate whether a conditioning activity (CA) of half-squats could potentiate CMJ performance above that of the optimal warm-up. Sixteen resistance trained males were recruited for the study. Participants performed six different warm-up volumes over six sessions. Warm-ups consisted of submaximal running, dynamic stretching and practice CMJs. After the warmup, participants rested for four minutes before performing three CMJs on a force platform. The warm-up which resulted in the best CMJ relative peak power (RPP) was considered to be that individual’s optimal warm-up. Participants attended another testing session where they performed their optimum warm-up followed by a pre-CMJ test. Participants then performed a CA of four half-squats with a 5RM load followed by post-CMJ tests after fourand eight-minutes recovery. No CMJ variable displayed significant improvements at either four or eight minutes recovery after the CA when compared to the pre-test. However, when everyone’s optimum recovery period was considered, CMJ height significantly improved by 5.2% (p = 0.009) when compared with pre-CMJ performance. If the optimum recovery period is considered, a half-squat CA can further mprove CMJ height above that of a general warm-up alone
The occurrence of different vertical jump types in basketball competition and their relationship with lower-body speed-strength qualities
- Authors: Talpey, Scott , Smyth, Andrew , O'Grady, Mathew , Morrison, Matthew , Young, Warren
- Date: 2021
- Type: Text , Journal article
- Relation: International Journal of Strength and Conditioning Vol. 1, no. 1 (2021), p.
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- Description: Jumps occur frequently in basketball and can be executed from a single-leg take-off following a run-up or bilaterally from a standing start. Understanding the type of jumps performed in competition and how different muscular qualities influence their performance, informs training prescription. Firstly, to quantify the occurrence of different jump types performed in competition an analysis of 15 semi-professional basketball games was undertaken. Secondly, to understand the influence of muscular qualities on performance of different jump types, Semi-professional male basketball players (N=17) performed jump tests standing vertical jump, running vertical jumps with a double leg take-off (RVJ2) and a single leg take-off (RVJ1) and tests of lower-body speed-strength reactive strength index (RSI) from a drop jump, counter movement jump (CMJ) and squat jump. A stationary approach was employed for 69%, a running approach for 26% and a one-step approach for 5%. RVJ1 displayed non-significant (P=0.07) moderate correlation with jump height attained from the CMJ (r=0.439) and a very large (r =.806) significant (P<0.01) correlation with RSI. Most jumps were executed from a stationary start with a bilateral take-off while a run-up occurred prior to a substantial proportion of jumps. Jumps with a single-leg take-off from a run-up strongly correlate with RSI.