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. 2019 May 29;317(2):R346–R354. doi: 10.1152/ajpregu.00084.2019

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Fig. 5. — A: surface EMG of the vastus lateralis during severe-intensity single-leg knee-extensor exercise in the left leg following ingestion of placebo (Leg_1PL) and acetaminophen (Leg_1ACT). B: surface EMG of the vastus lateralis during severe-intensity single-leg knee-extensor exercise in the right control leg (Leg_2CON) and in Leg₂ following prior exhaustive exercise in Leg₁ after ingestion of placebo (Leg_2PL-CONTRA) and acetaminophen (Leg_2ACT-CONTRA). Mean values for average rectified EMG during each muscle contraction were calculated and averaged over each 30-s period. Values are group means ± SE relative to the first 30 s of each trial. *Time to task failure (T_lim) significantly different from Leg_2PL-CONTRA and Leg_2ACT-CONTRA (P < 0.05).