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

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

Access to Document

10.1016/j.jelekin.2004.03.007

Cite this

@article{7c4d64be10ec44ed97931223cbe4c5a2,

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",

note = "Additional Information: Authored under previous name 'Joanna Kingman'.",

year = "2004",

month = dec,

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

language = "English",

volume = "14",

pages = "693--698",

journal = "Journal of Electromyography and Kinesiology",

issn = "1050-6411",

publisher = "Elsevier Limited",

number = "6",

}

TY - JOUR

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

N1 - Additional Information: Authored under previous name 'Joanna Kingman'.

PY - 2004/12

Y1 - 2004/12

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

M3 - Article

SN - 1050-6411

VL - 14

SP - 693

EP - 698

JO - Journal of Electromyography and Kinesiology

JF - Journal of Electromyography and Kinesiology

IS - 6

ER -

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

Abstract

Access to Document

Fingerprint

Cite this