Efficiency of FNS leg cycle ergometry

Roger M. Glaser, Stephen F. Figoni, Steven P. Hooker, Mary M. Rodgers, Bertram N. Ezenwa, Agaram G. Suryaprasad, Satyendra C. Gupta, Thomas Mathews

Research output: Chapter in Book/Report/Conference proceedingConference contribution

20 Scopus citations

Abstract

The efficiency of electrically induced leg cycle ergometry performed by spinal-cord-injured (SCI) subjects was compared to voluntary leg cycle ergometry performed by able-bodied (AB) subjects at power output (PO) levels of 6-42 W. Twenty SCI (9 quadriplegics and 11 paraplegics) and twenty AB subjects exercised on a leg cycle ergometer. SCI subjects received functional neuromuscular stimulation (FNS) of paralyzed leg musculature, while AB subjects pedaled voluntarily. Subjects performed a discontinuous, progressive intensity exercise test with 6-W (for SCI) or 12-W (for AB) PO increments between stages. Each exercise bout was 5 min in duration and was followed by a 5-min rest period. Steady-rate oxygen uptake (VO 2) and respiratory exchange ratio (RER) values were determined by open-circuit spirometry during the final minute of each stage. Gross, net, work, and data efficiencies were calculated for each PO. These efficiencies ranged from 2 to 14% for FNS cycling by SCI subjects and from 4 to 34% during voluntary cycling by AB subjects. At most POs, efficiencies for FNS cycling were significantly lower (by approximately one-half) than those for voluntary cycling. Despite the apparent energy-wastefulness or inefficiency of FNS leg cycle ergometry, the relatively high metabolic rates elicited by the exercise may be advantageous to SCI individuals seeking aerobic (cardiopulmonary) training effects.

Original languageEnglish (US)
Title of host publicationAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
EditorsYongmin Kim, Francis A. Spelman
PublisherPubl by Alliance for Engineering in Medicine & Biology
Pages961-963
Number of pages3
Volume11 pt 3
StatePublished - Nov 1989
Externally publishedYes
EventImages of the Twenty-First Century - Proceedings of the 11th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 1 - Seattle, WA, USA
Duration: Nov 9 1989Nov 12 1989

Other

OtherImages of the Twenty-First Century - Proceedings of the 11th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 1
CitySeattle, WA, USA
Period11/9/8911/12/89

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ASJC Scopus subject areas

  • Bioengineering

Cite this

Glaser, R. M., Figoni, S. F., Hooker, S. P., Rodgers, M. M., Ezenwa, B. N., Suryaprasad, A. G., Gupta, S. C., & Mathews, T. (1989). Efficiency of FNS leg cycle ergometry. In Y. Kim, & F. A. Spelman (Eds.), Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings (Vol. 11 pt 3, pp. 961-963). Publ by Alliance for Engineering in Medicine & Biology.