Fatigue and optimal conditions for short-term work capacity

European Journal of Applied Physiology
B R MacIntoshMinhan Kim

Abstract

There is an optimal load and corresponding velocity at which peak power output occurs. It is reasonable to expect that these conditions will change as a result of fatigue during 30 s of all-out cycling. This study evaluated optimal velocity after 30 s of maximal isokinetic cycle ergometer exercise and tested the hypothesis that progressive adjustment of velocity (optimized) during 30 s of all-out cycling would permit greater short-term work capacity (STWC). Non-fatigued optimal cadence [NF(OC), 109.6 (2.5) rpm] was determined for ten males on an SRM ergometer using regression analysis of the torque-angular velocity relation during a 7-s maximal acceleration. Fatigued optimal cadence [73.4 (2.4) rpm] was determined in the same way, immediately after a 30-s isokinetic test at NF(OC). A subsequent trial with cadence decreasing in steps from NF(OC) to a conservative estimate of fatigued optimal cadence [83.9 (2.8) rpm] was completed to see if more work could be done with a more optimal cadence during the test. STWC was not different ( P=0.50) between the constant [23,681 (764) J] and optimized [23,679 (708) J] conditions. Another more radical progressive change in cadence with four subjects yielded the same result (no increase in S...Continue Reading

Citations

Jun 15, 2007·European Journal of Applied Physiology·A Scott GardnerDavid G Jenkins
Jul 3, 2007·European Journal of Applied Physiology·Gregory C BogdanisMaria Maridaki
Oct 1, 2010·European Journal of Applied Physiology·Brian R MacIntosh, Jared R Fletcher
May 17, 2011·European Journal of Applied Physiology·Umberto Emanuele, Jachen Denoth
Jun 21, 2011·European Journal of Applied Physiology·Brian R Macintosh, Jared R Fletcher
Nov 3, 2011·European Journal of Applied Physiology·Umberto Emanuele, Jachen Denoth
Nov 22, 2015·Scandinavian Journal of Medicine & Science in Sports·F D LimaL F F Royes
Mar 21, 2019·The Journal of Experimental Biology·Renata L KrügerGuillaume Y Millet
Mar 12, 2009·Medicine and Science in Sports and Exercise·A Scott GardnerJames C Martin
May 10, 2011·Journal of Applied Physiology·Elias K Tomaras, Brian R MacIntosh
Jul 17, 2021·Sports Medicine - Open·Jamie DouglasJames C Martin

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