Data Analysis for Strength and Conditioning Coaches

Turner, Anthony N.; Brazier, Jon; Bishop, Chris; Chavda, Shyam; Cree, Jon; Read, Paul

doi:10.1519/ssc.0000000000000113

Cited by 88 publications

(57 citation statements)

References 1 publication

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“…All tests showed excellent reliability, except for 10 m, which showed an acceptable variability (<10%). These findings suggest the data being presented in this article can be interpreted with confidence for further analysis (Turner et al, 2015). Previous research supports that the level of experience and the structured strength and conditioning training (inclusive of speed and jump training) performed during the season seem to contribute to the good reliability of the data (Bishop et al, 2019a).…”

Section: Discussionsupporting

confidence: 65%

Strength, Jumping, and Change of Direction Speed Asymmetries Are Not Associated With Athletic Performance in Elite Academy Soccer Players

et al. 2020

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The aims of the present study were 2-fold: (1) to measure interlimb asymmetries from a battery of fitness tests in youth soccer players and (2) to determine the association between asymmetry and measures of athletic performance. Sixteen elite youth soccer players (14.7 ± 0.2 years) performed a single-leg Abalakov test (ABK), change of direction (COD) test over 10 m (5 + 5) and 20 m (10 + 10), and an iso-inertial power test. Subjects also performed 10-, 20-, and 30-m sprints and a bilateral countermovement jump, which were correlated with all ABK, COD, and iso-inertial asymmetry scores. A one-way repeated-measures analysis of variance showed significant differences between interlimb asymmetry scores across multiple tests (p < 0.05), with the isoinertial power test presenting the greatest magnitude of asymmetry, whereas individual data highlighted substantially greater interindividual differences in each test. Pearson r correlations showed no significant relationships (p > 0.05) between the different interlimb asymmetry scores, and between asymmetry scores and athletic performance. These findings show the test-specific nature of asymmetries in youth soccer players, with the iso-inertial power test being the most sensitive in detecting asymmetry. Moreover, the results obtained suggest that inherent asymmetry in young soccer players did not negatively impact their performance.

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Section: Discussionsupporting

confidence: 65%

Strength, Jumping, and Change of Direction Speed Asymmetries Are Not Associated With Athletic Performance in Elite Academy Soccer Players

et al. 2020

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“…Data were assessed for normality using the Shapiro-Wilk test. Absolute reliability was computed via the coefficient of variation (CV) (SD/mean)*100 (38) and standard error of measurement (SEM) SD*(1-ICC) (15). Relative reliability was assessed using a twoway random intraclass correlation coefficient (ICC) with absolute agreement, inclusive of 95% confidence intervals.…”

Section: Statistical Analysesmentioning

confidence: 99%

Bilateral Deficit During Jumping Tasks: Relationship With Speed and Change of Direction Speed Performance

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Berney

Lake

et al. 2021

Journal of Strength and Conditioning Research

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Research to date has investigated the phenomenon of the bilateral deficit (BLD); however, limited research exists on its association with measures of athletic performance. The purpose of the present study was to investigate the magnitude of the BLD and examine its relationship with linear speed and change of direction speed (CODS) performance. Eighteen physically active and healthy university students performed double and single leg countermovement jumps (CMJ), drop jumps (DJ) and standing broad jumps (SBJ), to calculate the BLD across jump tasks. Subjects also performed 10m and 30m sprints and a 505 CODS test, which were correlated with all BLD metrics. Results showed varying levels of BLD across CMJ metrics (jump height, peak force, eccentric impulse, concentric impulse, peak power), DJ metrics (ground contact time, flight time), and the SBJ (distance). However, a bilateral facilitation (BLF) was shown for jump height and reactive strength index (RSI) during the DJ test. The main findings of the present study were that: 1) a larger BLD in CMJ jump height related to a faster 505 change of direction (COD) (left leg) (r =-0.48; p = 0.04), 505 COD (right leg) (r =-0.53; p = 0.02) and COD deficit (right leg) (r =-0.59; p = 0.01), 2) a larger BLD in CMJ concentric impulse related to faster 505 COD (left leg) (r =-0.51; p = 0.03), 505 COD (right leg) (r =-0.64, p = 0.01) and COD deficit (right leg) (r =-0.60; p = 0.01), 3) a larger BLD in DJ flight time related to a faster 505 COD (left leg) (r =-0.48; p = 0.04). These results suggest that a larger BLD is associated with faster CODS performance, but not linear speed. This highlights the individual nature of the BLD and may support the notion of developing movement competency on one limb for enhanced CODS performance.

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“…16 Smallest worthwhile change (SWC; based on between-subject SD 17 ) was calculated for small (SWC 0.2 ), moderate (SWC 0.6 ), and large (SWC 1.2 ) effect sizes and compared to TE scores. 18 ICC and SWC were calculated for change scores (test two-test one) on days 1 and 2. Relationships between variables were assessed by calculating Pearson's correlation coefficients (r).…”

Section: Data Analysesmentioning

confidence: 99%

A damaging punch: Assessment and application of a method to quantify punch performance

et al. 2019

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Measurement of punch performance in a reliable, quantitative manner is relevant to combat sport, military, and concussion research. A punching protocol (3MPT) was developed, based on performance demands of amateur boxing, and evaluated on a custom‐built punch integrator (PI). PI reliability and accuracy were assessed by calculating TE and CV for a range of known masses. A within‐subject, repeated‐measures design assessed the test‐retest reliability of 3MPT. Fifteen male boxers (17.5 ± 0.5 years; 177.5 ± 9.5 cm; 73.0 ± 14.0 kg) were familiarized and then completed two 3MPT trials 90 minutes apart on 2 days (total of four tests). Peak punch force (N), relative punch force (N/kg), impulse (N·s), and rate of force development calculated to various time points were compared using a linear mixed model. Smallest worthwhile change (SWC) was also computed. PI data were reliable and accurate (CV <0.1%). TE and SWC comparisons revealed that 3MPT can detect moderate and large changes in performance; however, within‐day reliability improved from day 1 (3.1%‐13.8%) to 2 (2.3%‐5.1%) indicating a possible learning effect. Likewise, differences between test one and two were greater on day 1 than 2. Numerous punch‐related variables can be accurately and reliably measured using the 3MPT but repeat‐trial familiarization is suggested to reduce between‐test variability.

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Data Analysis for Strength and Conditioning Coaches

Cited by 88 publications

References 1 publication

Strength, Jumping, and Change of Direction Speed Asymmetries Are Not Associated With Athletic Performance in Elite Academy Soccer Players

Strength, Jumping, and Change of Direction Speed Asymmetries Are Not Associated With Athletic Performance in Elite Academy Soccer Players

Bilateral Deficit During Jumping Tasks: Relationship With Speed and Change of Direction Speed Performance

A damaging punch: Assessment and application of a method to quantify punch performance

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