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Power output for wheelchair driving on a treadmill compared with arm crank ergometry
Linköping University, Department of Neuroscience and Locomotion, Rehabilitation Medicine. Linköping University, Faculty of Health Sciences.
Linköping University, Department of Neuroscience and Locomotion, Rehabilitation Medicine. Linköping University, Faculty of Health Sciences.
Department of Clinical Physiology, Karolinska Hospital, Stockholm, Sweden.
1997 (English)In: British Journal of Sports Medicine, ISSN 0306-3674, E-ISSN 1473-0480, Vol. 31, no 1, 41-44 p.Article in journal (Refereed) Published
Abstract [en]

OBJECTIVES: The limiting factors with regard to power output available for wheelchair ambulation have not been identified. The aim of the present study was to correlate power output during wheelchair driving with (i) power output and oxygen uptake during arm crank ergometry and (ii) arm muscle strength.

METHODS: Eleven disabled men were examined for maximal power output (POmax) during wheelchair driving on a treadmill and during arm crank ergometry. Oxygen uptake (VO2) was recorded at submaximal and maximal arm crank ergometry in all men and during submaximal wheelchair driving on a treadmill in four men. Power output during wheelchair driving on a treadmill was measured. Static and dynamic elbow muscle strength was measured isokinetically.

RESULTS: POmax was significantly lower (P < 0.001) for wheelchair driving (109 (31) W; mean (SD)) than for arm ergometry (163 (49) W). There was a significant correlation between POmax for arm crank ergometry and wheelchair driving (r = 0.73). There was no correlation between POmax and elbow strength. The mechanical efficiency was constant for the different levels on the arm crank ergometry test. The submaximal testing showed a consistently lower mechanical efficiency for wheelchair driving than for arm crank ergometry.

CONCLUSIONS: It is suggested that the lower level of power output for wheelchair driving is fully explained by the lower mechanical efficiency. Any improvement in power output available for ambulation must be based on wheelchair ergonomics.

Place, publisher, year, edition, pages
1997. Vol. 31, no 1, 41-44 p.
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-81542DOI: 10.1136/bjsm.31.1.41OAI: oai:DiVA.org:liu-81542DiVA: diva2:553302
Available from: 2012-09-18 Created: 2012-09-18 Last updated: 2017-12-07Bibliographically approved
In thesis
1. Active wheelchair use in daily life: considerations for mobility and seating
Open this publication in new window or tab >>Active wheelchair use in daily life: considerations for mobility and seating
2002 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Introduction: Wheelchair fit and prescription are central in the rehabilitation process of a spinal cord injured client with an impaired walking ability. The knowledge and consequences of wheelchair use in active wheelchair users is deficient, which might lead to unnecessary problems and disabilities.

Objective: The general aim of the research underlying this thesis was to increase and deepen the knowledge of wheelchair use, considering both mobility and seating aspects.

Methods: The thesis includes five different studies, two of them with a focus on wheelchair mobility, two with a focus on secondary complications common in wheelchair users and one intervention study with a focus on wheelchair seating. Methods used to measure and describe wheelchair use from mobility and seating aspects are well-standardized, valid and reliable methods, custom-made newly developed forms and client estimations.

Results: The power output and mechanical efficiency of wheelchair propulsion was found to be low compared to arm-crank ergometry in a group of experienced wheelchair users. Another study found that it was not possible to affect this mechanical efficiency in a uniform positive way, by a change in rear-wheel position. A significant change in propulsion technique was found which, however, did not correlate to physical effort. Secondary complications such as back pain, spinal defonnities and shoulder pain were common in clients with a spinal cord injury. In the intervention study a change in seating prerequisites had a positive effect on estimated seating comfort, posture and activity.

Conclusion: Wheelchair propulsion and seating mean high physical and musculoskeletal load on the individual with a risk for secondary complications. A prescriber of hand-rim wheelchairs to clients who will spend many years in their wheelchairs has a major responsibility to understand and use available knowledge, to carefully examine the physical prerequisites of each client, and to interrelate these findings to individual needs and wishes. There is a great need for continuous development of new methods and knowledge in this area in order to avoid unnecessary complications due to wheelchair use. There is also a need for new thinking in the construction and design of new wheelchairs.

Place, publisher, year, edition, pages
Linköping: Linköpings universitet, 2002. 70 p.
Series
Linköping University Medical Dissertations, ISSN 0345-0082 ; 753
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:liu:diva-28075 (URN)12839 (Local ID)91-7373-196-X (ISBN)12839 (Archive number)12839 (OAI)
Public defence
2002-11-15, Berzeliussalen, Hälsouniversitet, Linköping, 13:00 (Swedish)
Opponent
Available from: 2009-10-08 Created: 2009-10-08 Last updated: 2012-09-18Bibliographically approved

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Tropp, HansSamuelsson, Kersti

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