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Mercer RAJ, Russell JL, McGuigan LC, Coutts AJ, Strack DS, McLean BD. Finding the Signal in the Noise-Interday Reliability and Seasonal Sensitivity of 84 Countermovement Jump Variables in Professional Basketball Players. J Strength Cond Res 2023; 37:394-402. [PMID: 36696261 DOI: 10.1519/jsc.0000000000004182] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
ABSTRACT Mercer, RAJ, Russell, JL, McGuigan, LC, Coutts, AJ, Strack, DS, and McLean, BD. Finding the signal in the noise-interday reliability and seasonal sensitivity of 84 countermovement jump variables in professional basketball players. J Strength Cond Res 37(2): 394-402, 2023-This study examined the measurement characteristics of countermovement jump (CMJ) variables in basketball athletes using different variable selection criteria. Test-retest reliability (noise) and seasonal variability (signal) CMJ data were collected from 13 professional basketball athletes playing for the same club throughout 1 competitive season. Interday reliability (coefficient of variation [CV] and intraclass correlation coefficients) were calculated over 3 preseason tests conducted on 3 consecutive days. To evaluate sensitivity, signal-to-noise ratio (SNR) was calculated by dividing seasonal variability (CV) from 8 in-season CMJ tests (collected from November to February) by preseason reliability (CV). Players performed 3 CMJs each testing day, and 3 data analysis techniques were applied: a single variable from the trial with either the best jump height (BestJH; calculated by flight time) or the best flight time to contraction time (BestFT:CT) and mean output across 3 jumps (Mean3). Mean3 was the most reliable data analysis technique, with 79 and 82 of 84 variables displaying lower interday CVs compared with BestJH and BestFT:CT, respectively. Overall, many CMJ measures display seasonal changes that are greater than the inherent noise, with 77 variables producing SNR of >1.00 for Mean3 compared with 65 and 58 variables for BestJH and BestFT:CT, respectively. To improve reliability and sensitivity, it is recommended that practitioners use the average of multiple CMJ trials and regularly reassess measurement characteristics specific to their cohort and environment.
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Affiliation(s)
- Richard A J Mercer
- School of Sport, Exercise and Rehabilitation, Faculty of Health, University of Technology Sydney (UTS), Sydney, NSW, Australia ; and
- Oklahoma City Thunder Professional Basketball Club, Human and Player Performance, Oklahoma City, Oklahoma
| | - Jennifer L Russell
- School of Sport, Exercise and Rehabilitation, Faculty of Health, University of Technology Sydney (UTS), Sydney, NSW, Australia ; and
- Oklahoma City Thunder Professional Basketball Club, Human and Player Performance, Oklahoma City, Oklahoma
| | - Lauren C McGuigan
- School of Sport, Exercise and Rehabilitation, Faculty of Health, University of Technology Sydney (UTS), Sydney, NSW, Australia ; and
| | - Aaron J Coutts
- School of Sport, Exercise and Rehabilitation, Faculty of Health, University of Technology Sydney (UTS), Sydney, NSW, Australia ; and
| | - Donnie S Strack
- Oklahoma City Thunder Professional Basketball Club, Human and Player Performance, Oklahoma City, Oklahoma
| | - Blake D McLean
- School of Sport, Exercise and Rehabilitation, Faculty of Health, University of Technology Sydney (UTS), Sydney, NSW, Australia ; and
- Oklahoma City Thunder Professional Basketball Club, Human and Player Performance, Oklahoma City, Oklahoma
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Carling C, Lacome M, McCall A, Dupont G, Le Gall F, Simpson B, Buchheit M. Reply to Lewin and O'Driscoll: Comment on: "Monitoring of Post-Match Fatigue in Professional Soccer: Welcome to the Real World". Sports Med 2019; 49:491-492. [PMID: 30607600 DOI: 10.1007/s40279-018-01049-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Christopher Carling
- Institute of Coaching and Performance, University of Central Lancashire, Preston, UK.
| | - Mathieu Lacome
- Performance Department, Paris Saint-Germain Football Club, Saint-Germain-en-Laye, France
| | - Alan McCall
- Research Department for Sports and Exercise Science, Faculty of Health, Life and Social Sciences, Edinburgh Napier University, Edinburgh, UK.,Medical Department, Arsenal Football Club, London, UK
| | - Gregory Dupont
- The Football Exchange, Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
| | | | - Ben Simpson
- Performance Department, Paris Saint-Germain Football Club, Saint-Germain-en-Laye, France
| | - Martin Buchheit
- Performance Department, Paris Saint-Germain Football Club, Saint-Germain-en-Laye, France
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