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Is being a regular player with fewer teammates associated with musculoskeletal pain in youth team sports? A cross-sectional study.

Is being a regular player with fewer teammates associated with musculoskeletal pain in youth team sports? A cross-sectional study.
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Abe T, Kamada M, Kitayuguchi J, Okada S, Mutoh Y, Uchio Y,


Abe T, Kamada M, Kitayuguchi J, Okada S, Mutoh Y, Uchio Y, (click to view)

Abe T, Kamada M, Kitayuguchi J, Okada S, Mutoh Y, Uchio Y,

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BMC musculoskeletal disorders 2017 03 1418(1) 105 doi 10.1186/s12891-017-1470-z
Abstract
BACKGROUND
Musculoskeletal pain (MSP) is a commonly reported symptom in youth sports players. Some sports-related risk factors have been reported, but previous studies on extrinsic risk factors did not focus on management of team members (e.g., regular or non-regular players, number of players) for reducing sports-related MSP. This study aimed to examine the association of playing status (regular or non-regular players) and team status (fewer or more teammates) with MSP in youth team sports.

METHODS
A total of 632 team sports players (age: 12-18 years) in public schools in Unnan, Japan completed a self-administered questionnaire to determine MSP (overall, upper limbs, lower back, and lower limbs) and playing status (regular or non-regular players). Team status was calculated as follows: teammate quantity index (TQI) = [number of teammates in their grade]/[required number of players for the sport]. Associations between the prevalence of pain and joint categories of playing and team status were examined by multivariable-adjusted Poisson regression.

RESULTS
A total of 272 (44.3%) participants had MSP at least several times a week in at least one part of the body. When divided by playing or team status, 140 (47.0%) regular and 130 (41.7%) non-regular players had MSP, whereas 142 (47.0%) players with fewer teammates (lower TQI) and 127 (41.8%) players with more teammates (higher TQI) had MSP. When analyzed jointly, regular players with fewer teammates had a higher prevalence of lower back pain compared with non-regular players with more teammates (21.3% vs 8.3%; prevalence ratio = 2.08 [95% confidence interval 1.07-4.02]). The prevalence of MSP was highest in regular players with fewer teammates for all other pain outcomes, but this was not significant.

CONCLUSION
Regular players with fewer teammates have a higher risk of lower back pain. Future longitudinal investigations are required.

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