Muscle damage
Muscle damage is the micro-stress inflicted on fibers during training, especially in the eccentric phase, associated with (but not equal to) muscle growth.
Also known as: Exercise-induced muscle damage (EIMD)
It is what usually causes delayed soreness (DOMS) a day or two later, mostly after new exercises or heavy emphasis on lowering the load. Some degree of damage is part of adaptation, but damage is not the goal: soreness is not a measure of a good workout, and excess only hurts recovery and weekly volume.
It is one of the three classic mechanisms of hypertrophy, together with mechanical tension and metabolic stress, though its role is secondary and still debated. The sensible approach is to chase good stimulus and progression, letting damage be a consequence — not a target. SelfShapeAI helps dose this by managing volume and progression without pushing you into unnecessary fatigue.
See also
Sources
Scientific references behind this entry.
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