Why do my shoulders completely lock up after shoveling thick snow for an hour?
1. Introduction Shoulders completely locking up after shoveling thick snow for an hour is a protective physiological response known as an acute muscle spasm, triggered by biomechanical overload and microtrauma to the localized tissues. The repetitive motion of lifting and aggressively throwing heavy, wet snow places unaccustomed and immense eccentric strain on the delicate rotator … Read more