Muscle activation and local muscular fatigue during a twelve minute rotational bridge

James Dickie, James Faulkner, Matt Barnes, Sally Lark

Research output: Contribution to journalArticleResearchpeer-review

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Abstract

Due to anecdotal reports of back pain during a 12-minute rotational bridge test by uniformed services the level of fatigue leading to possible back pain and or injury was investigated. We hypothesised a high level of fatigue due to diminishing core muscle activation. Nineteen highly trained uniformed service members were measured by surface electromyography of the rectus abdominis, external oblique, internal oblique, lumbar erector spinae, thoracic erector spinae and latissimus dorsi. Average rectified electromyography amplitude (AEMG) and median power frequency were analysed to determine activation and fatigue. All AEMG was normalised and expressed as a percentage of maximal voluntary isometric contraction (%MVIC). Significant increases in AEMG were observed over the test duration for the rectus abdominis (+ 19.5 %MVIC), external oblique (+ 18.0 %MVIC) and internal oblique (+ 23.2 %MVIC) during the prone position; and for the external oblique (+ 21.8 %MVIC) when bracing on the measurement side (all, p < 0.05). No significant changes in median power frequency were observed (all, p > 0.05). Combining prone and side bridge positions is a reasonable measure of anterior, posterior and lateral trunk musculature. Muscular fatigue remained low throughout making this a safe assessment in trained individuals.
Original languageEnglish
JournalSports Biomechanics
Volume00
Issue number000
Publication statusPublished - 2 Apr 2018

Keywords

  • Core
  • neuromuscular
  • electromyography

Cite this

Dickie, J., Faulkner, J., Barnes, M., & Lark, S. (2018). Muscle activation and local muscular fatigue during a twelve minute rotational bridge. Sports Biomechanics, 00(000).
Dickie, James ; Faulkner, James ; Barnes, Matt ; Lark, Sally. / Muscle activation and local muscular fatigue during a twelve minute rotational bridge. In: Sports Biomechanics. 2018 ; Vol. 00, No. 000.
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abstract = "Due to anecdotal reports of back pain during a 12-minute rotational bridge test by uniformed services the level of fatigue leading to possible back pain and or injury was investigated. We hypothesised a high level of fatigue due to diminishing core muscle activation. Nineteen highly trained uniformed service members were measured by surface electromyography of the rectus abdominis, external oblique, internal oblique, lumbar erector spinae, thoracic erector spinae and latissimus dorsi. Average rectified electromyography amplitude (AEMG) and median power frequency were analysed to determine activation and fatigue. All AEMG was normalised and expressed as a percentage of maximal voluntary isometric contraction ({\%}MVIC). Significant increases in AEMG were observed over the test duration for the rectus abdominis (+ 19.5 {\%}MVIC), external oblique (+ 18.0 {\%}MVIC) and internal oblique (+ 23.2 {\%}MVIC) during the prone position; and for the external oblique (+ 21.8 {\%}MVIC) when bracing on the measurement side (all, p < 0.05). No significant changes in median power frequency were observed (all, p > 0.05). Combining prone and side bridge positions is a reasonable measure of anterior, posterior and lateral trunk musculature. Muscular fatigue remained low throughout making this a safe assessment in trained individuals.",
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Dickie, J, Faulkner, J, Barnes, M & Lark, S 2018, 'Muscle activation and local muscular fatigue during a twelve minute rotational bridge', Sports Biomechanics, vol. 00, no. 000.

Muscle activation and local muscular fatigue during a twelve minute rotational bridge. / Dickie, James; Faulkner, James; Barnes, Matt; Lark, Sally.

In: Sports Biomechanics, Vol. 00, No. 000, 02.04.2018.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Muscle activation and local muscular fatigue during a twelve minute rotational bridge

AU - Dickie, James

AU - Faulkner, James

AU - Barnes, Matt

AU - Lark, Sally

PY - 2018/4/2

Y1 - 2018/4/2

N2 - Due to anecdotal reports of back pain during a 12-minute rotational bridge test by uniformed services the level of fatigue leading to possible back pain and or injury was investigated. We hypothesised a high level of fatigue due to diminishing core muscle activation. Nineteen highly trained uniformed service members were measured by surface electromyography of the rectus abdominis, external oblique, internal oblique, lumbar erector spinae, thoracic erector spinae and latissimus dorsi. Average rectified electromyography amplitude (AEMG) and median power frequency were analysed to determine activation and fatigue. All AEMG was normalised and expressed as a percentage of maximal voluntary isometric contraction (%MVIC). Significant increases in AEMG were observed over the test duration for the rectus abdominis (+ 19.5 %MVIC), external oblique (+ 18.0 %MVIC) and internal oblique (+ 23.2 %MVIC) during the prone position; and for the external oblique (+ 21.8 %MVIC) when bracing on the measurement side (all, p < 0.05). No significant changes in median power frequency were observed (all, p > 0.05). Combining prone and side bridge positions is a reasonable measure of anterior, posterior and lateral trunk musculature. Muscular fatigue remained low throughout making this a safe assessment in trained individuals.

AB - Due to anecdotal reports of back pain during a 12-minute rotational bridge test by uniformed services the level of fatigue leading to possible back pain and or injury was investigated. We hypothesised a high level of fatigue due to diminishing core muscle activation. Nineteen highly trained uniformed service members were measured by surface electromyography of the rectus abdominis, external oblique, internal oblique, lumbar erector spinae, thoracic erector spinae and latissimus dorsi. Average rectified electromyography amplitude (AEMG) and median power frequency were analysed to determine activation and fatigue. All AEMG was normalised and expressed as a percentage of maximal voluntary isometric contraction (%MVIC). Significant increases in AEMG were observed over the test duration for the rectus abdominis (+ 19.5 %MVIC), external oblique (+ 18.0 %MVIC) and internal oblique (+ 23.2 %MVIC) during the prone position; and for the external oblique (+ 21.8 %MVIC) when bracing on the measurement side (all, p < 0.05). No significant changes in median power frequency were observed (all, p > 0.05). Combining prone and side bridge positions is a reasonable measure of anterior, posterior and lateral trunk musculature. Muscular fatigue remained low throughout making this a safe assessment in trained individuals.

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KW - electromyography

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Dickie J, Faulkner J, Barnes M, Lark S. Muscle activation and local muscular fatigue during a twelve minute rotational bridge. Sports Biomechanics. 2018 Apr 2;00(000).