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The effects of knee joint angle on neuromuscular activity during electrostimulation in healthy older adults

The effects of knee joint angle on neuromuscular activity during electrostimulation in healthy older adults
The effects of knee joint angle on neuromuscular activity during electrostimulation in healthy older adults
Introduction: electrostimulation devices stimulate the common peroneal nerve, producing a calf muscle-pump action to promote venous circulation. Whether knee joint angle influences calf neuromuscular activity remains unclear. Our aim was to determine the effects of knee joint angle on lower limb neuromuscular activity during electrostimulation.

Methods: fifteen healthy, older adults underwent 60 min of electrostimulation, with the knee joint at three different angles (0°, 45° or 90° flexion; random order; 20 min each). Outcome variables included electromyography of the peroneus longus, tibialis anterior and gastrocnemius medialis and lateralis and discomfort.

Results: knee angle did not influence tibialis anterior and peroneus longus neuromuscular activity during electrostimulation. Neuromuscular activity was greater in the gastrocnemius medialis (p = 0.002) and lateralis (p = 0.002) at 90°, than 0° knee angle. Electrostimulation intensity was positively related to neuromuscular activity for each muscle, with a knee angle effect for the gastrocnemius medialis (p = 0.05).

Conclusion: results suggest that during electrostimulation, knee joint angle influenced gastrocnemii neuromuscular activity; increased gastrocnemius medialis activity across all intensities (at 90°), when compared to 0° and 45° flexion; and did not influence peroneus longus and tibialis anterior activity. Greater electrostimulation-evoked gastrocnemii activity has implications for producing a more forceful calf muscle-pump action, potentially further improving venous flow.
2055-6683
Gavin, James Peter
e0d9b404-3f63-4855-8e64-bf1692e6cc3f
Cooper, Meryl
647b2943-2eda-4a99-8398-08590ac84daf
Wainwright, Tom W.
18f5ff6a-584b-45b0-b6fb-b2f850ba1014
Gavin, James Peter
e0d9b404-3f63-4855-8e64-bf1692e6cc3f
Cooper, Meryl
647b2943-2eda-4a99-8398-08590ac84daf
Wainwright, Tom W.
18f5ff6a-584b-45b0-b6fb-b2f850ba1014

Gavin, James Peter, Cooper, Meryl and Wainwright, Tom W. (2018) The effects of knee joint angle on neuromuscular activity during electrostimulation in healthy older adults. Journal of Rehabilitation and Assistive Technologies Engineering (RATE), 5. (doi:10.1177/2055668318779506).

Record type: Article

Abstract

Introduction: electrostimulation devices stimulate the common peroneal nerve, producing a calf muscle-pump action to promote venous circulation. Whether knee joint angle influences calf neuromuscular activity remains unclear. Our aim was to determine the effects of knee joint angle on lower limb neuromuscular activity during electrostimulation.

Methods: fifteen healthy, older adults underwent 60 min of electrostimulation, with the knee joint at three different angles (0°, 45° or 90° flexion; random order; 20 min each). Outcome variables included electromyography of the peroneus longus, tibialis anterior and gastrocnemius medialis and lateralis and discomfort.

Results: knee angle did not influence tibialis anterior and peroneus longus neuromuscular activity during electrostimulation. Neuromuscular activity was greater in the gastrocnemius medialis (p = 0.002) and lateralis (p = 0.002) at 90°, than 0° knee angle. Electrostimulation intensity was positively related to neuromuscular activity for each muscle, with a knee angle effect for the gastrocnemius medialis (p = 0.05).

Conclusion: results suggest that during electrostimulation, knee joint angle influenced gastrocnemii neuromuscular activity; increased gastrocnemius medialis activity across all intensities (at 90°), when compared to 0° and 45° flexion; and did not influence peroneus longus and tibialis anterior activity. Greater electrostimulation-evoked gastrocnemii activity has implications for producing a more forceful calf muscle-pump action, potentially further improving venous flow.

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The effects of knee joint angle on neuromuscular activity during electrostimulation in healthy older adults - Accepted Manuscript
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Accepted/In Press date: 27 March 2018
Published date: 21 August 2018

Identifiers

Local EPrints ID: 429105
URI: http://eprints.soton.ac.uk/id/eprint/429105
ISSN: 2055-6683
PURE UUID: 58688ca5-aa08-4935-b0d5-a820c3631ece
ORCID for James Peter Gavin: ORCID iD orcid.org/0000-0003-0574-0502

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Date deposited: 21 Mar 2019 17:30
Last modified: 22 Nov 2021 03:24

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Contributors

Author: Meryl Cooper
Author: Tom W. Wainwright

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