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Cumulative and total FTI during fatiguing contractions. A, Cumulative FTI during fatigue trials; data normalized for FTI of first tetanic contraction; solid gray line, CTRL; solid black line, NAC; long-dashed line, NACA; dotted line, ERGO. Error bars are shown at 60-s intervals. B, Total FTI represents sum of absolute FTI from all contractions of fatigue trial. *P < 0.05 control versus NAC.
