Ligandrol (LGD-4033) is a selective androgen receptor modulator investigated for its potential effects on lean muscle development, strength, and physical performance. Research has explored its selective interaction with androgen receptors in muscle and bone tissues, with interest in anabolic activity and tissue-specific responses. LGD-4033 continues to be examined in body composition and muscle preservation research, particularly regarding its potential influence on lean mass, strength-related outcomes, and performance-associated physiological pathways under controlled research conditions.