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Measures of strength and jump performance can predict 30-m sprint time in rugby union players
journal contribution
posted on 2019-03-18, 10:55 authored by Laura-Anne Furlong, Andrew J. Harrison, Randall L. JensenPerformance and fitness monitoring in Rugby Union often include jumping,
sprinting and strength tests, but repeatability of, and relationships between,
these measures are unclear. The level of inter-individual variability in these
relationships and their sprint time predictive capabilities are also unknown. This
study examined the reliability of, and relationship between, countermovement
(CMJJH), squat (SJJH), and rebound (RBJJH) jump heights, rebound jump contact
time (RBJCT), estimated 1RM back squat relative to body mass (SQBM), and
Reactive Strength Index (RSI) to 30 m sprint time of sub-elite, semi-professional
Rugby Union players. Measurement reliability was very good, with high average
intra-class correlation coefficients (≥ 0.9) and low coefficient of variation
(<10.1%). All variables were significantly (p < 0.01) correlated to each other (r >
.575), except for SQBM (only related to CMJJH, r = .621) and RBJCT (only related
to RSI, r = -.727). SJJH and SQBM were the strongest and most consistent
predictors of time to 30 m (R = .754 ± .081; SEE = .166 ± .025), but variability
in SEE magnitude was observed across the group during bootstrapping. Crossvalidation showed a mean difference between actual and predicted 30 m times
equivalent to 0.22% of the group average time to 30 m. These results support
the importance of multiple aspects of fitness training in Rugby Union players for
improving performance in short duration sprinting activities, but highlight the
individual nature of their relative importance. Measures of strength and power
can be used to predict short sprint performance by the strength and conditioning
professional.
History
School
- Sport, Exercise and Health Sciences
Published in
Journal of Strength and Conditioning ResearchVolume
35Issue
9Pages
2579-2583Citation
FURLONG, L-A., HARRISON, A.J. and JENSEN, R.L., 2021. Measures of strength and jump performance can predict 30-m sprint time in rugby union players. Journal of Strength and Conditioning Research, 35 (9), pp.2579-2583.Publisher
Lippincott, Williams & WilkinsVersion
- AM (Accepted Manuscript)
Rights holder
© National Strength and Conditioning AssociationPublisher statement
This is a non-final version of an article published in final form in Journal of Strength and Conditioning Research: September 2021 - Volume 35 - Issue 9 - p 2579-2583 doi: 10.1519/JSC.0000000000003170.Acceptance date
2019-03-07Publication date
2019-04-17Copyright date
2019ISSN
1533-4287Publisher version
Language
- en