isometric muscle

Another study emphasized progressive relaxation, isometric muscle endurance, dynamic strength, coordination, balance, and body perception, seeing significant improvements to patients' quality of life after 4-weeks.

Physical restraints are not recommended for agitation or delirium as they may contribute to mortality by enforcing isometric muscle contractions that are associated with severe lactic acidosis and hyperthermia.

Dr. Boyer and Dr. Shannon cautioned against using physical restraints to control agitation because they could enforce isometric muscle contractions that cause a severe buildup of lactic acid and a life-threatening rise in body temperature.