The Single-Bout Forearm Critical Force Test: A New Method to Establish Forearm Aerobic Metabolic Exercise Intensity and Capacity

J Mikhail Kellawan and Michael E Tschakovsky

PLOS ONE, 2014, vol. 9, issue 4, 1-10

Abstract: No non-invasive test exists for forearm exercise that allows identification of power-time relationship parameters (W′, critical power) and thereby identification of the heavy-severe exercise intensity boundary and scaling of aerobic metabolic exercise intensity. The aim of this study was to develop a maximal effort handgrip exercise test to estimate forearm critical force (fCF; force analog of power) and establish its repeatability and validity. Ten healthy males (20–43 years) completed two maximal effort rhythmic handgrip exercise tests (repeated maximal voluntary contractions (MVC); 1 s contraction-2 s relaxation for 600 s) on separate days. Exercise intensity was quantified via peak contraction force and contraction impulse. There was no systematic difference between test 1 and 2 for fCFpeak force (p = 0.11) or fCFimpulse (p = 0.76). Typical error was small for both fCFpeak force (15.3 N, 5.5%) and fCFimpulse (15.7 N⋅s, 6.8%), and test re-test correlations were strong (fCFpeak force, r = 0.91, ICC = 0.94, p fCFpeak force. TTE predicted by W′ showed good agreement with actual TTE during the TTE tests (r = 0.97, ICC = 0.97, P

Date: 2014
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0093481

DOI: 10.1371/journal.pone.0093481

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