By Unknown Jumat, 21 April 2017 arms biceps biceps brachii biceps femoris build strength high effort low effort low intensity mental effort performance strength visualization Visualization Boosts Strength Gains - 'Mental Effort' Boosts Biceps Strength Gains on Low Intensity Workout by 20%! The study setup looked sign. different. You will have heard or read about resistance training experts and bodybuilders alike bragging about ...