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Fig. 4. Fatigue index. The fatigue index is a measure of the percent of force
production capacity remaining after a fatiguing series of contractions, and is
thus a measure of muscle endurance. The fatigue index of semitendinosus
muscles from the four groups was significantly increased only by cold
acclimation, and the CT group showed the highest resistance to fatigue. Values
are means ± S.E.M. and different
superscripted letters indicate significant pairwise differences between
groups. CS, cold, sedentary; CT, cold, trained; TnS, thermoneutral, sedentary;
TnT, thermoneutral, trained.