The reliability of a maximal isometric hip strength and simultaneous surface EMG screening protocol in elite, junior rugby league athletes

Charlton, Paula C., Mentiplay, Benjamin F., Grimaldi, Alison, Pua, Yong-Hao and Clark, Ross A. (2017) The reliability of a maximal isometric hip strength and simultaneous surface EMG screening protocol in elite, junior rugby league athletes. Journal of Science and Medicine in Sport, 20 2: 139-145. doi:10.1016/j.jsams.2016.06.008


Author Charlton, Paula C.
Mentiplay, Benjamin F.
Grimaldi, Alison
Pua, Yong-Hao
Clark, Ross A.
Title The reliability of a maximal isometric hip strength and simultaneous surface EMG screening protocol in elite, junior rugby league athletes
Journal name Journal of Science and Medicine in Sport   Check publisher's open access policy
ISSN 1878-1861
1440-2440
Publication date 2017-02-01
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.jsams.2016.06.008
Open Access Status Not yet assessed
Volume 20
Issue 2
Start page 139
End page 145
Total pages 7
Place of publication Chatswood, NSW, Australia
Publisher Elsevier Australia
Language eng
Subject 2732 Orthopedics and Sports Medicine
3612 Physical Therapy, Sports Therapy and Rehabilitation
Abstract Firstly to describe the reliability of assessing maximal isometric strength of the hip abductor and adductor musculature using a hand held dynamometry (HHD) protocol with simultaneous wireless surface electromyographic (sEMG) evaluation of the gluteus medius (GM) and adductor longus (AL). Secondly, to describe the correlation between isometric strength recorded with the HHD protocol and a laboratory standard isokinetic device.
Formatted abstract
Objectives: Firstly to describe the reliability of assessing maximal isometric strength of the hip abductor and adductor musculature using a hand held dynamometry (HHD) protocol with simultaneous wireless surface electromyographic (sEMG) evaluation of the gluteus medius (GM) and adductor longus (AL). Secondly, to describe the correlation between isometric strength recorded with the HHD protocol and a laboratory standard isokinetic device.

Design: Reliability and correlational study.

Methods: A sample of 24 elite, male, junior, rugby league athletes, age 16–20 years participated in repeated HHD and isometric Kin-Com (KC) strength testing with simultaneous sEMG assessment, on average (range) 6 (5–7) days apart by a single assessor. Strength tests included; unilateral hip abduction (ABD) and adduction (ADD) and bilateral ADD assessed with squeeze (SQ) tests in 0 and 45° of hip flexion.

Results: HHD demonstrated good to excellent inter-session reliability for all outcome measures (ICC(2,1) = 0.76–0.91) and good to excellent association with the laboratory reference KC (ICC(2,1) = 0.80–0.88). Whilst intra-session, inter-trial reliability of EMG activation and co-activation outcome measures ranged from moderate to excellent (ICC(2,1) = 0.70–0.94), inter-session reliability was poor (all ICC(2,1) < 0.50).

Conclusions: Isometric strength testing of the hip ABD and ADD musculature using HHD may be measured reliably in elite, junior rugby league athletes. Due to the poor inter-session reliability of sEMG measures, it is not recommended for athlete screening purposes if using the techniques implemented in this study.
Keyword Athletes
Gluteal muscle
Hip
Hip muscle
Muscle strength
Sports
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Health and Rehabilitation Sciences Publications
 
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