Document Detail

Exercise Responses during FES Cycling in Individuals with Spinal Cord Injury.
MedLine Citation:
PMID:  23274595     Owner:  NLM     Status:  Publisher    
PURPOSE: This study compared acute exercise responses during arm cranking, functional electrical stimulation (FES)-assisted leg cycling and combined arm and leg ("hybrid") cycling in individuals with spinal cord injury (SCI) during maximal and submaximal exercise. METHODS: Nine male subjects with long-standing neurological lesions from C7-T12 were recruited. All subjects performed arm crank ergometry (ACE), FES-leg cycle exercise (FES-LCE), combined ACE+FES-LCE and cycling on a hybrid FES tricycle (HYBRID). They were assessed for their peak exercise responses in all four modalities. Subsequently, their submaximal heart rates (HR), cardiac outputs (Q), stroke volumes (SV) and arteriovenous oxygen extractions (Ca-Cv)O2 were measured at 40%, 60% and 80% of mode-specific VO2peak. RESULTS: Arm exercise alone and arm+leg exercise resulted in significantly higher VO2peak and HRpeak compared to FES-LCE (p<0.05). Submaximal VO2 during FES-LCE was significantly lower than all other modalities, across the range of exercise intensities (p<0.05). ACE elicited 70-94% higher steady-state VO2, and HYBRID evoked 99-148% higher VO2 compared to FES-LCE. Steady-state FES-LCE also produced significantly lower Q, HR, and (Ca-Cv)O2. ACE evoked 31-36% higher Q and 19-47% greater HR than did FES-LCE. HYBRID elicited 31-49% greater Q and 23-56% higher HR than FES-LCE. CONCLUSIONS: Combined arm and leg exercise can develop a higher oxygen uptake and greater cardiovascular demand compared to ACE or FES-LCE alone. These findings suggested that combined arm+leg FES training at submaximal exercise intensities may lead to greater gains of aerobic fitness than would arm exercise alone. These data also proffered that FES leg-cycling exercise by itself may be insufficient to promote aerobic fitness in the SCI population.
Nazirah Hasnan; Nalan Ektas; Aldre I P Tanhoffer; Ricardo Tanhoffer; Che Fornusek; James Middleton; Ruby Husain; Glen M Davis
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-12-27
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  -     ISSN:  1530-0315     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-12-31     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
1Clinical Exercise and Rehabilitation Unit, Faculty of Health Sciences, University of Sydney, Sydney, AUSTRALIA 2Department of Rehabilitation Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, MALAYSIA 3Department of Physiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, MALAYSIA.
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