Everyone's physiology is different and reactions to muscle stimulation will vary. While our default program ensures the safest, most accurate intensity level, pad placements, and session time for your needs, adjusting the intensity level until you see a visual twitch in the muscle being treated is a general rule of thumb. As the smartest muscle stimulator in recovery, Tactical X Gear intelligently takes fatigue level, recent activity, and other unique needs into account when recommending intensity level.