The relationship between lumbar multifidus muscle function and performance on the single-leg squat task

Neill, Sharne; Creaby, Mark W.; Hides, Julie; Crowley, Geoff; Smith, Martin

doi:10.1016/j.jsams.2012.11.815

Cited by 2 publications

(2 citation statements)

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“…Additionally, trunk flexion during the SLS is clinically applicable to underactive or weak bilateral multifidi [1]. However, the multifidus muscle is known to have more of a proprioceptive role in controlling for lumbar lordosis [13] during weightbearing tasks and may have been sufficiently activated in these athletes since they exhibited minimal trunk flexion.…”

Section: Discussionmentioning

confidence: 99%

“…A link segment model was then developed through digitization of bony landmarks used to estimate the joint centers for the ankle, knee, thoracic vertebrae 12 (T12) to lumbar vertebrae 1 (L1), and cervical vertebrae 7 (C7) to thoracic vertebrae 1 (T1). The spinal column was defined as the digitized space between the associated spinous processes, whereas the ankle and knee were defined as the midpoints of the digitized medial and lateral malleoli, and the medial and lateral femoral condyles, respectively [13,[16][17][18]27].…”

Section: Methodsmentioning

confidence: 99%

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Acute Hip Abduction Fatigue on Lumbopelvic-Hip Complex Stability in Softball Players

2018

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During an overhead throw, the gluteal muscle group stabilizes the lumbopelvic-hip complex (LPHC), leading to efficient energy transfer from the lower to upper extremity. It has been shown that LPHC instability can lead to throwing pathomechanics. The single leg squat has become a common assessment for LPHC stability, and could be used to determine the effects of fatigue on throwing athletes. The purpose of this study was to determine the effects of an acute abduction fatigue protocol on the LPHC of collegiate softball players via the single leg squat assessment of the leg ipsilateral to the throwing arm. Eighteen National Collegiate Athletic Association Division I softball players volunteered (20.5±1.9 years; 169.4±10.0 cm; 72.9±11.5 kg). Each participant performed a single leg squat on the leg ipsilateral to the throwing arm prior to and post side-lying hip abduction fatigue. LPHC and lower extremity kinematics were examined to determine potential effects of fatigue on LPHC stability. There were no significant main effects or interactions of LPHC or lower extremity kinematics during the single leg squat assessments across the fatigue protocol. Based on the current study, an acute bout of fatigue to the hip abductors does not affect LPHC stability in single leg squat execution.

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Section: Discussionmentioning

confidence: 99%