Date of Award

Spring 1998

Document Type

Thesis

Degree Name

Master of Science in Education (MSEd)

Department

Human Movement Sciences

Program/Concentration

Physical Education

Committee Director

David Swain

Committee Member

J. David Branch

Committee Member

Elizabeth Dowling

Call Number for Print

Special Collections LD4331.E44 L54

Abstract

During a bicycle time trial, varying power slightly to counter external conditions may result in improved performance [Swain, 1997], but it is not known if such power variations result in added physiological stress. Thus, the purpose of this study was to determine if variable power (VP) cycling produced greater physiological stress than constant power (CP) cycling of the same mean intensity. Eight trained male cyclists (age 28 ± 2 yr, mass 74.4 ± 2.3 kg, VO2max 4.24 ± 0.13 L•min-1, weekly training 277 ± 44 km) performed three 1 h ergometer trials. The first trial was performed at a self-paced maximal effort. The mean power from that trial was used to determine the power for the CP trial (constant effort at mean power) and the VP trial (alternating between ± 5% of mean power every 5 min). No differences were found between the CP and VP trials in mean VO2 (CP 3.33 ± 0.11 L•min-1, VP 3.26 ± 0.12 L·min-1), mean heart rate (CP 158 ± 3 min-1, VP 159 ± 3 min-1), mean blood lactate concentration (CP 4.2 ± 0.7 mM, VP 4.3 ± 0.7 mM), or mean RPE (CP 13.9 ± 0.4, VP 14.1 ± 0.4). Therefore, during a strenuous 1 h effort (78% of VO2max), subjects experienced no additional physiological stress by varying power ± 5% compared to a constant power effort.

Rights

In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).

DOI

10.25777/cdrz-cm42

Download

Share

COinS