Dorsal muscle fatigue increases thoracic spine curvature in all-out recreational ergometer rowing

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Dorsal muscle fatigue increases thoracic spine curvature in all-out recreational ergometer rowing. / Willwacher, Steffen; Koopmann, Till; Dill, Stephan; Kurz, Markus; Brüggemann, Gert-Peter.

in: European Journal of Sport Science, 2020, S. 1-7.

Publikationen: Beitrag in FachzeitschriftZeitschriftenaufsätzeForschungBegutachtung

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@article{aaaa5d59b00b4f55b91e9c9bcb1a6d8d,
title = "Dorsal muscle fatigue increases thoracic spine curvature in all-out recreational ergometer rowing",
abstract = "The purpose of this study was to investigate fatigue-related changes in spinal kinematics, kinetics, and muscle activity of back muscles during a 2000 m all-out ergometer rowing performance. We analyzed ten male subjects with experience in both rowing and CrossFit exercises. We applied a novel kinematic method to describe spine curvature, determined bending moments at the spine using inverse dynamics and collected EMG data. We identified significant increases in spine curvature of the thoracic spine (i.e. vertebrae Th6 to Th11). Significant increases in peak moments were found only at the upper spine (i.e. Th2). We found no significant changes in EMG amplitudes, while the frequency analysis showed significant decreases in the mean frequencies (MNF) for the M. latissimus dorsi, the M. trapezius descendens and the M. deltoideus posterior. No significant changes on MNF were found for the Mm. erector spinae. We hypothesize that the significant increase in curvature for the thoracic spine is connected to the fatigued back muscles, especially the Mm. trapezius descendens, and might lead to an unbalanced loading of intervertebral discs and other structures. These findings are particularly important for athletes and coaches in CrossFit as strenuous rowing intervals are combined with technical exercises with high loads on the back and spine (e.g. power and Olympic lifting) leading to impaired muscular stabilization and potentially to an increased injury risk.",
keywords = "Back injury, CrossFit, coaching, functional training, spine",
author = "Steffen Willwacher and Till Koopmann and Stephan Dill and Markus Kurz and Gert-Peter Br{\"u}ggemann",
year = "2020",
doi = "10.1080/17461391.2020.1737242",
language = "English",
pages = "1--7",
journal = "European Journal of Sport Science",
issn = "1746-1391",
publisher = "Taylor and Francis Ltd.",

}

RIS

TY - JOUR

T1 - Dorsal muscle fatigue increases thoracic spine curvature in all-out recreational ergometer rowing

AU - Willwacher, Steffen

AU - Koopmann, Till

AU - Dill, Stephan

AU - Kurz, Markus

AU - Brüggemann, Gert-Peter

PY - 2020

Y1 - 2020

N2 - The purpose of this study was to investigate fatigue-related changes in spinal kinematics, kinetics, and muscle activity of back muscles during a 2000 m all-out ergometer rowing performance. We analyzed ten male subjects with experience in both rowing and CrossFit exercises. We applied a novel kinematic method to describe spine curvature, determined bending moments at the spine using inverse dynamics and collected EMG data. We identified significant increases in spine curvature of the thoracic spine (i.e. vertebrae Th6 to Th11). Significant increases in peak moments were found only at the upper spine (i.e. Th2). We found no significant changes in EMG amplitudes, while the frequency analysis showed significant decreases in the mean frequencies (MNF) for the M. latissimus dorsi, the M. trapezius descendens and the M. deltoideus posterior. No significant changes on MNF were found for the Mm. erector spinae. We hypothesize that the significant increase in curvature for the thoracic spine is connected to the fatigued back muscles, especially the Mm. trapezius descendens, and might lead to an unbalanced loading of intervertebral discs and other structures. These findings are particularly important for athletes and coaches in CrossFit as strenuous rowing intervals are combined with technical exercises with high loads on the back and spine (e.g. power and Olympic lifting) leading to impaired muscular stabilization and potentially to an increased injury risk.

AB - The purpose of this study was to investigate fatigue-related changes in spinal kinematics, kinetics, and muscle activity of back muscles during a 2000 m all-out ergometer rowing performance. We analyzed ten male subjects with experience in both rowing and CrossFit exercises. We applied a novel kinematic method to describe spine curvature, determined bending moments at the spine using inverse dynamics and collected EMG data. We identified significant increases in spine curvature of the thoracic spine (i.e. vertebrae Th6 to Th11). Significant increases in peak moments were found only at the upper spine (i.e. Th2). We found no significant changes in EMG amplitudes, while the frequency analysis showed significant decreases in the mean frequencies (MNF) for the M. latissimus dorsi, the M. trapezius descendens and the M. deltoideus posterior. No significant changes on MNF were found for the Mm. erector spinae. We hypothesize that the significant increase in curvature for the thoracic spine is connected to the fatigued back muscles, especially the Mm. trapezius descendens, and might lead to an unbalanced loading of intervertebral discs and other structures. These findings are particularly important for athletes and coaches in CrossFit as strenuous rowing intervals are combined with technical exercises with high loads on the back and spine (e.g. power and Olympic lifting) leading to impaired muscular stabilization and potentially to an increased injury risk.

KW - Back injury

KW - CrossFit

KW - coaching

KW - functional training

KW - spine

UR - https://www.mendeley.com/catalogue/7f8861da-4463-3dcf-8e1f-9875b7ea540e/

U2 - 10.1080/17461391.2020.1737242

DO - 10.1080/17461391.2020.1737242

M3 - Journal articles

C2 - 32108557

SP - 1

EP - 7

JO - European Journal of Sport Science

JF - European Journal of Sport Science

SN - 1746-1391

ER -

ID: 5233843