Otto, R. M., Walsh, L., Marra, J., Kushner, C., Diaz, A., Richardson, C., & Wygand, J. W. (2008). The impact of 10 weeks of independent cycle crank use on cycle performance. ACSM 55th Annual Meeting Indianapolis, Presentation Number 1294.

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This investigation evaluated the effect of 10 weeks of using independent cycle cranks on cycling performance as measured by oxygen-use efficiency, time-trial performance, and body composition. Triathletes (M = 16; F = 14) participated in familiarization trials (including an electronic cycle ergometer based steady state oxygen efficiency trial and a time trial). Identical testing also was performed during a pre-test (within one week) and a post-test (10 weeks later) around the experimental procedure. After the pre-test trial, Ss were assigned to one of three groups. For 10 weeks Ss exercised (swim, cycle, run) a minimum of eight hours per week. All groups cycled a minimum of three hours/week with a control group using fixed cranks for 180 minutes per week, a second group using fixed cranks for 90 minutes and independent cranks for 90 minutes, and a third group using independent cranks for 180 minutes per week

There were no significant differences within or between groups on oxygen use efficiency or time-trial performances.

Implication. The use of independent cycle crank arms for a maximum of 30 hours over 10 weeks did not change cycling time-trial performance or the efficiency of oxygen usage when cycling. Any effects from this form of training are independent of the factors of interest.

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