Differential strength and endurance parameters of the craniocervical and cervicothoracic extensors and flexors in healthy individuals

O'Leary, Shaun, Fagermoen, Charlotte Loraas, Hasegawa, Hiroyuki, Thorsen, Ann-Sofi Slettevold and Van Wyk, Luke (2017) Differential strength and endurance parameters of the craniocervical and cervicothoracic extensors and flexors in healthy individuals. Journal of Applied Biomechanics, 33 2: 166-170. doi:10.1123/jab.2016-0168


Author O'Leary, Shaun
Fagermoen, Charlotte Loraas
Hasegawa, Hiroyuki
Thorsen, Ann-Sofi Slettevold
Van Wyk, Luke
Title Differential strength and endurance parameters of the craniocervical and cervicothoracic extensors and flexors in healthy individuals
Journal name Journal of Applied Biomechanics   Check publisher's open access policy
ISSN 1543-2688
1065-8483
Publication date 2017-04-01
Sub-type Article (original research)
DOI 10.1123/jab.2016-0168
Open Access Status Not yet assessed
Volume 33
Issue 2
Start page 166
End page 170
Total pages 5
Place of publication Champaign, IL, United States
Publisher Human Kinetics
Collection year 2018
Language eng
Formatted abstract
This study examined isometric strength (maximal voluntary contraction [MVC]) and endurance of cervical flexor and extensor muscles in healthy individuals at the craniocervical (CC) and cervicothoracic (CT) axes. MVC and endurance measures (time to task failure in seconds [s]) at 50% MVC were recorded in 4 directions (CC flexion, CC extension, CT flexion, and CT extension) in 20 males and 20 females, and 6 strength and endurance ratios were calculated. The findings showed that the cervical extensor muscles are not only much stronger than the flexors (1.3-2 times greater MVC), but also have greater capacity for endurance (2-2.4 times greater). While males produced significantly greater MVC recordings than females (P < .003), strength ratios (P > .06) and endurance measures (P > .11) were similar. Endurance ratios were also similar except the CT extension to CC flexion ratio, which was significantly larger in females compared with males (P = .03). These findings demonstrate that substantial but normal variation exists in strength and endurance parameters between cervical flexor and extensor muscles. This is informative to clinicians when evaluating the performance of these neck muscles or when deciding on exercise parameters (eg, load, duration) when training their performance.
Keyword Cervical spine
Dynamometry
Muscle performance
Ratios
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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