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Mechanical muscular power output and work during ergometer cycling at different work loads and speeds.
KTH, School of Technology and Health (STH), Ergonomics. (Ergonomi)
1988 (English)In: European Journal of Applied Physiology and Occupational Physiology, ISSN 0301-5548, E-ISSN 1432-1025, Vol. 57, no 4, 382-7 p.Article in journal (Refereed) Published
Abstract [en]

The aim of the study was to calculate the magnitude of the instantaneous muscular power output at the hip, knee and ankle joints during ergometer cycling at different work loads and speeds. Six healthy subjects pedalled a weight-braked cycle ergometer at 0, 120 and 240 W at a constant speed of 60 rpm. The subjects also pedalled at 40, 60, 80 and 100 rpm against the same resistance, giving power outputs of 80, 120, 160 and 200 W respectively. The subjects were filmed with a cine-film camera, and pedal reaction forces were recorded from a force transducer mounted in the pedal. The muscular work for the hip, knee and ankle joint muscles was calculated using a model based upon dynamic mechanics and described elsewhere. The total work during one pedal revolution significantly increased with increased work load but did not increase with increased pedalling rate at the same braking force. The relative proportions of total positive work at the hip, knee and ankle joints were also calculated. Hip and ankle extension work proportionally decreased with increased work load. Pedalling rate did not change the relative proportion of total work at the different joints.

Place, publisher, year, edition, pages
1988. Vol. 57, no 4, 382-7 p.
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:kth:diva-77581PubMedID: 3396551OAI: oai:DiVA.org:kth-77581DiVA: diva2:498422
Note
NR 20140805Available from: 2012-02-12 Created: 2012-02-07 Last updated: 2017-12-07Bibliographically approved

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