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  The effect of variable frequency trains during FES cycling

Ferrante, S., Schauer, T., Ferrigno, G., & Raisch, J. (2006). The effect of variable frequency trains during FES cycling. In Proceedings of the 11th Annual Conference of the International Functional Electrical Stimulation Society (IFESS 2006) (pp. 127-129).

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 Creators:
Ferrante, S.1, Author
Schauer, T.2, Author
Ferrigno, G.1, Author
Raisch, J.2, 3, Author           
Affiliations:
1Politecnico di Milano, Milano, Italy, ou_persistent22              
2TU Berlin, ou_persistent22              
3Systems and Control Theory, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society, ou_1738154              

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 Abstract: The purpose of this paper is to investigate variable frequency stimulation patterns as a mean of increasing torque production and hence performance in FES cycling. Specific experiments were carried out on 6 healthy subjects using a motor to keep a constant cadence. We stimulated the quadricep muscle of both the legs and measured the torque produced at the crank. Three different patterns with the same number of stimulation pulses in the train and with an initial ramp modulation of the pulsewidth (PW) were compared: 1 constant frequency train (CFT) with an interpulse interval (IPI) of 50ms and 2 catchlike-inducing trains (CIT). The tested CIT had two different IPI of the remaining low-frequency part of the train (50ms and 55ms) and the doublet was always placed at the end of the PW ramp up.The results indicated that the CIT produced significantly greater torque time integrals and torque peaks than CFT both in fresh and fatigued muscles. In addition the CIT showed a lower reduction of the parameters tested between pre-fatigue and fatigue conditions.Our results suggest that stimulation with CIT increased the torque produced for each applied stimulation pulse improving the performance of FES cycling compared to CFT stimulation.

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Language(s): eng - English
 Dates: 2006
 Publication Status: Issued
 Pages: -
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 Rev. Type: -
 Identifiers: eDoc: 298197
 Degree: -

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Title: 11th Annual Conference of the International Functional Electrical Stimulation Society (IFESS 2006)
Place of Event: Zao, Japan
Start-/End Date: 2006-09-12 - 2006-09-15

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Title: Proceedings of the 11th Annual Conference of the International Functional Electrical Stimulation Society (IFESS 2006)
Source Genre: Proceedings
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Publ. Info: -
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 127 - 129 Identifier: -