Isokinetic force-power profile of the shoulder joint in males participating in CrossFit training and competing at different levels

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dc.contributor.authorTorres-Banduc, Maximiliano A.
dc.contributor.authorJerez-Mayorga, Daniel
dc.contributor.authorMoran, Jason
dc.contributor.authorKeogh, Justin W.L.
dc.contributor.authorRamírez-Campillo, Rodrigo
dc.date.accessioned2025-05-28T19:04:43Z
dc.date.available2025-05-28T19:04:43Z
dc.date.issued2021-09
dc.descriptionIndexación: Scopus.
dc.description.abstractBackground: As participants who engage in CrossFit training and competition perform a large volume of high intensity overhead activities, injuries to the shoulder are one of the most common in this sport. Previous research in other sports has indicated that the isokinetic force power profile of the shoulder joint (IPSJ) rotator muscles may assist in the prediction of shoulder injury. Aim: Therefore, the objective of this study was to determine the IPSJ in males engaged in CrossFit training at different competitive levels. Methods: In a cross-sectional study design, participants (age, 24.1 ± 2.7 years) classified as ‘beginner’ (n = 6), ‘intermediate’ (n = 7) or ‘advanced’ (n = 9) provided informed consent to participate in this study. The IPSJ assessment involved rotational and diagonal movements, including internal and external shoulder rotator muscles, at both 180˚.s−1 and 300˚.s−1. The variables analysed were peak torque/body mass (%), mean power (W) and the external/internal peak torque/body mass ratio (%). A Kruskal–Wallis test was used to compare the IPSJ of the three groups, with Dunn’s test used for post-hoc analysis. The alpha level was set at p < 0.05. Results: The IPSJ showed greater torque and power values in those who competed at the advanced level as compared to those at a lower competitive level (i.e. intermediate, beginner). This was observed mainly for the internal rotation and internal diagonal movements at both 180˚.s−1 and 300˚.s−1. However, such differences between competitive levels were, in general, absent for the external rotation and external diagonal movements. Moreover, the participants from the advanced competitive level exhibited an imbalance of peak torque between the muscles responsible for the external–internal rotational and external-internal diagonal movements of the shoulder (i.e. peak torque external/internal ratio <66%), particularly in the dominant shoulder. Conclusion: These findings suggest greater development of the shoulder internal rotators and a higher probability of shoulder injury in CrossFit athletes at the advanced competitive level. Based on these results, participants engaged in CrossFit training and competition may wish to increase the volume of training for the shoulder external rotator muscles to complement the large increases in shoulder internal rotator strength that occur as a part of their regular training regimes. Copyright 2021 Torres-Banduc et al.
dc.description.accesoabiertoSI
dc.description.urihttps://peerj.com/articles/11643/
dc.identifier.citationPeerJ, Volume 9, September 2021, Article number e11643
dc.identifier.doi10.7717/peerj.11643
dc.identifier.generoH
dc.identifier.issn2167-8359
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/64987
dc.language.isoen
dc.other.orcidhttps://orcid.org/0000-0002-0047-3399
dc.other.orcidhttps://orcid.org/0000-0002-6878-8004
dc.other.orcidhttps://orcid.org/0000-0001-9851-1068
dc.other.orcidhttps://orcid.org/0000-0003-2035-3279
dc.publisherPeerJ Inc.
dc.rights.licenseAttribution 4.0 International CC BY 4.0 Deed
dc.rights.urihttps://www.creativecommons.org/licenses/by/4.0/
dc.subjectAthletic performance
dc.subjectExercise therapy
dc.subjectHuman physical conditioning
dc.subjectInjuries
dc.subjectPhysical education and training
dc.subjectPlyometric exercise
dc.subjectResistance training
dc.subjectReturn to sport
dc.subjectSports
dc.subjectStrength training
dc.titleIsokinetic force-power profile of the shoulder joint in males participating in CrossFit training and competing at different levels
dc.typeArtículo
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