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Comparative Strength and Endurance Parameters of the Craniocervical and Cervicothoracic Extensors and Flexors in Females With and Without Idiopathic Neck Pain.
Journal of Applied Biomechanics 2019 March 13
Isometric strength and endurance performance of cervical flexor and extensor muscles were compared in women with (n = 30) and without (n = 30) idiopathic neck pain at the craniocervical and cervicothoracic axes. Strength and endurance time (time to task failure in seconds (s)) at 50% maximal voluntary contraction were recorded in 4 directions (craniocervical flexion/extension, cervicothoracic flexion/extension) and six strength and endurance ratios were calculated. Participants in both groups were matched for Body Mass Index. The idiopathic neck pain group demonstrated significantly less strength for the cervicothoracic flexors and extensors (1.58 - 4.7 N m (12.4 - 17.9%) less, P < .04) and significantly less endurance time for the cervicothoracic and craniocervical flexors (10.77 - 10.9 s (23.3 - 27.5 % less, P < .03). The cervicothoracic extension to craniocervical flexion strength ratio was also lower in the idiopathic neck pain group (P = .01) however, no other strength or endurance ratio was significantly different between groups. This exploratory study suggests assessing specific performance parameters accounting for regional muscular differences in the upper and lower neck are potentially informative to understanding impairments in neck pain conditions, particularly as impairments may not be uniform across muscle groups.
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