This study determined the effects of different volumes of high-intensity resistance training on isometric torque and muscle thickness. Training was conducted three times per week using one set (group N = 18) or three sets (group N = 20) of exercise. A control group (N = 10) performed no exercise of the experimental form. Both groups improved torque similarly at most angles. There were no significant differences in muscle thickness changes. Implication: One set of high-intensity resistance training is as effective as three sets for increasing isometric torque and muscle thickness. Repetitious fatiguing on strength exercises as a form of supplementary training should be questioned. Doing only one maximal set should be evaluated to see if any effect is transferred to actual performance.
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