The effect of foot orthotics on myoelectric fatigue in the vastus lateralis during a simulated skier’s squat

N. Vanicek; Joanna Scurr; Clare Hencken

doi:10.1016/j.jelekin.2004.03.007

The effect of foot orthotics on myoelectric fatigue in the vastus lateralis during a simulated skier’s squat

N. Vanicek, Joanna Scurr, Clare Hencken

School of Sport, Health & Exercise Science

Research output: Contribution to journal › Article › peer-review

Abstract

Fatigue in the legs is a problem experienced by skiers. It has been suggested that optimal orthotics may reduce muscle fatigue for a given movement task by minimising muscle activity (Med. Sci. Sports Exerc. 31 (1999) S421). The aims were to determine whether EMG would provide an independent method of analysing myoelectric fatigue in the vastus lateralis (VL) during a skier’s squat and whether orthotics could affect this fatigue response. Six skiers performed skier’s squats for as long as possible with no orthotic, low volume orthotics and high volume orthotics in their ski boots. Bipolar, active surface electrodes recorded EMG activity in the VL throughout each squat. Results for the EMG median frequency showed a significant shift in the power density spectrum towards the lower frequencies (P0.05). Subjective and objective findings support the use of the high volume foot orthotic for skiers.

Original language	English
Pages (from-to)	693-698
Number of pages	6
Journal	Journal of Electromyography and Kinesiology
Volume	14
Issue number	6
DOIs	https://doi.org/10.1016/j.jelekin.2004.03.007
Publication status	Published - Dec 2004

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10.1016/j.jelekin.2004.03.007

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title = "The effect of foot orthotics on myoelectric fatigue in the vastus lateralis during a simulated skier{\textquoteright}s squat",

abstract = "Fatigue in the legs is a problem experienced by skiers. It has been suggested that optimal orthotics may reduce muscle fatigue for a given movement task by minimising muscle activity (Med. Sci. Sports Exerc. 31 (1999) S421). The aims were to determine whether EMG would provide an independent method of analysing myoelectric fatigue in the vastus lateralis (VL) during a skier{\textquoteright}s squat and whether orthotics could affect this fatigue response. Six skiers performed skier{\textquoteright}s squats for as long as possible with no orthotic, low volume orthotics and high volume orthotics in their ski boots. Bipolar, active surface electrodes recorded EMG activity in the VL throughout each squat. Results for the EMG median frequency showed a significant shift in the power density spectrum towards the lower frequencies (P0.05). Subjective and objective findings support the use of the high volume foot orthotic for skiers.",

author = "N. Vanicek and Joanna Scurr and Clare Hencken",

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year = "2004",

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doi = "10.1016/j.jelekin.2004.03.007",

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T1 - The effect of foot orthotics on myoelectric fatigue in the vastus lateralis during a simulated skier’s squat

AU - Vanicek, N.

AU - Scurr, Joanna

AU - Hencken, Clare

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PY - 2004/12

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N2 - Fatigue in the legs is a problem experienced by skiers. It has been suggested that optimal orthotics may reduce muscle fatigue for a given movement task by minimising muscle activity (Med. Sci. Sports Exerc. 31 (1999) S421). The aims were to determine whether EMG would provide an independent method of analysing myoelectric fatigue in the vastus lateralis (VL) during a skier’s squat and whether orthotics could affect this fatigue response. Six skiers performed skier’s squats for as long as possible with no orthotic, low volume orthotics and high volume orthotics in their ski boots. Bipolar, active surface electrodes recorded EMG activity in the VL throughout each squat. Results for the EMG median frequency showed a significant shift in the power density spectrum towards the lower frequencies (P0.05). Subjective and objective findings support the use of the high volume foot orthotic for skiers.

AB - Fatigue in the legs is a problem experienced by skiers. It has been suggested that optimal orthotics may reduce muscle fatigue for a given movement task by minimising muscle activity (Med. Sci. Sports Exerc. 31 (1999) S421). The aims were to determine whether EMG would provide an independent method of analysing myoelectric fatigue in the vastus lateralis (VL) during a skier’s squat and whether orthotics could affect this fatigue response. Six skiers performed skier’s squats for as long as possible with no orthotic, low volume orthotics and high volume orthotics in their ski boots. Bipolar, active surface electrodes recorded EMG activity in the VL throughout each squat. Results for the EMG median frequency showed a significant shift in the power density spectrum towards the lower frequencies (P0.05). Subjective and objective findings support the use of the high volume foot orthotic for skiers.

U2 - 10.1016/j.jelekin.2004.03.007

DO - 10.1016/j.jelekin.2004.03.007

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ER -

The effect of foot orthotics on myoelectric fatigue in the vastus lateralis during a simulated skier’s squat

Abstract

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