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Lower body peak force but not power is an important discriminator of elite senior rugby league players

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Wade, Jarrod, Fuller, Joel, Devlin, Paul, Doyle, Timothy L.A.·2020·Kinesiology
DOI 10.26582/k.52.1.14
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Abstract

This investigation determined differences in lower body strength and power between elite junior (17-20 years) and elite senior (open-aged) rugby league athletes. Twenty junior and 25 senior athletes performed an isometric mid-thigh pull, countermovement jump, repeated jump, and broad jump tests during a National Rugby League pre-season. The effects of age (junior vs. senior) and position (adjustables vs. hit-up forwards vs. outside backs) on test results were investigated using a two-way analysis of variance. Cohen’s d effect sizes (ES) and 95% confidence intervals were calculated for pairwise comparisons. Isometric mid-thigh pull absolute peak force was greater for senior players compared to junior players (ES=0.88, p<.05). Countermovement jump absolute peak power was greater for outside backs (ES=1.12) and hit-up forwards (ES=1.23) compared to adjustables (p<.05), greater for senior outside backs compared to junior outside backs (ES=1.53, p<.05), and greater for junior hit-up forwards compared to senior hit-up forwards (ES=1.00, p<.05). This research demonstrated the differences in strength and power of rugby league athletes between playing age and position. Improving lower body strength should be prioritised for athletic development of junior rugby league athletes, with consideration given to requirements across different playing positions.

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  • The maximal-strength values of combat sport athletes are lower than other elite level sports such as rugby league and athletics.

    “However, the maximal-strength values of these combat sport athletes are lower than other elite level sports such as rugby league (3833 ± 675 N; 38.0 ± 4.7 N/kg) (48) and athletics (3522 ± 634 N; 39.6 ± 4.6 N/kg) (31).”

    From The Role of Strength on Punch Impact Force in Boxing (2022) · cites this paper as [48]

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Research works printed but not linked: 1

  1. [3]3. Ballard, D. (2016). Positional benchmarking and team selection based on physical qualities in elite rugby league. Journal of Australian Strength and Conditioning, 24(5), 6-15.

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Authors
Wade, J., Fuller, J., Devlin, P., & Doyle, T. L. A.
Affiliations
  • Macquarie University (AU)
  • Faculty of Medicine, Health, and Human Sciences, Macquarie University, Sydney, NSW, Australia
ORCID
Fuller, Joel
Venue
Kinesiology
Publisher
Faculty of Kinesiology, University of Zagreb
Published
2020
Volume
52
Issue
1
Pages
109-114
ISSN
  • 1331-1441 (ISSN-L)
  • 1848-638X
DOI
10.26582/k.52.1.14
OpenAlex
W3027203153
Cited by
3
References
18
Citations by year
2026: 1 · 2025: 1 · 2022: 1
FWCI
0.25
Type
journal article
Language
en
Open access
Locations
  • Kinesiology (publishedVersion)
  • Hrčak Portal of scientific journals of Croatia (University Computing Centre) (submittedVersion, other-oa)
  • Griffith Research Online (submittedVersion, cc-by-nc)
Topics
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports injuries and prevention
  • Social Sciences › Psychology › Developmental and Educational Psychology › Sport Psychology and Performance
Keywords
rugby league, lower limb strength, lower body power, peak force, countermovement jump, isometric mid-thigh pull, standing long jump, playing position, age differences, athlete development, elite rugby players

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