Why do my chest muscles twitch rapidly after completing a heavy bench press?
1. Introduction Rapid chest muscle twitching after a heavy bench press is clinically known as benign fasciculation, which occurs due to acute motor unit fatigue and localized neuromuscular hyper-excitability. The intense physical demand of lifting heavy weights depletes cellular energy stores and alters the electrochemical balance of calcium and potassium within the pectoralis muscle fibers. … Read more