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Sports 2018, 6(2), 53; https://doi.org/10.3390/sports6020053

The Assessment of Isometric, Dynamic, and Sports-Specific Upper-Body Strength in Male and Female Competitive Surfers

1
Surfing Australia High Performance Centre, Casuarina Beach 2487, Australia
2
Centre for Exercise and Sports Science Research, School of Medical and Health Sciences, Edith Cowan University, Joondalup 6027, Australia
3
Canadian Sports Institute-Pacific, Whistler VON 1BO, Canada
4
Queensland Academy of Sport, Nathan 4111, Australia
5
School of Applied Science, Edinburgh Napier University, Edinburgh EH11 4BN, Scotland, UK
*
Author to whom correspondence should be addressed.
Received: 10 April 2018 / Revised: 24 May 2018 / Accepted: 24 May 2018 / Published: 5 June 2018
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Abstract

The primary purpose of this study was to investigate gender differences in the dynamic strength index (DSI): an assessment of upper-body dynamic strength relative to maximal isometric strength. The secondary purpose was to investigate gender differences in the dynamic skill deficit (DSD): an assessment of sports-specific dynamic strength relative to maximal isometric strength, and its association with a sports-specific performance measure in surfers. Nine male (age = 30.3 ± 7.3 yrs) and eight female (age = 25.5 ± 5.2 yrs) surfers undertook three upper-body assessments: isometric push-up, dynamic push-up, and a force plate pop-up to determine the DSI and DSD. The performance measure of time taken to pop-up (TTP) was recorded. No gender differences for the DSI (d = 0.48, p = 0.33) or DSD (d = 0.69, p = 0.32) were observed. Normalized peak force (PF) of the isometric push-up, dynamic push-up, and force plate pop-up were significantly greater in males (p ≤ 0.05), with males recording significantly quicker TTP (d = 1.35, p < 0.05). The results suggest that male and female surfers apply a similar proportion of their maximal strength in sports-specific movements. However, greater normalized isometric and dynamic strength in males resulted in greater sports-specific PF application and a faster TTP. It would appear favorable that female surfers improve their maximal strength to facilitate sports-specific pop-up performance. View Full-Text
Keywords: assessment; skill; performance; pop-up; gender assessment; skill; performance; pop-up; gender
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Parsonage, J.; Secomb, J.; Dowse, R.; Ferrier, B.; Sheppard, J.; Nimphius, S. The Assessment of Isometric, Dynamic, and Sports-Specific Upper-Body Strength in Male and Female Competitive Surfers. Sports 2018, 6, 53.

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