Physical therapy is a rehabilitative field focused on restoring physical function, mobility, and reducing pain following injury, illness, or disability. The practice involves the evaluation and treatment of impairments through various methods, including guided exercise programs, manual physical manipulation, and the application of physical agents like heat, cold, and electrical stimulation. Treatment plans are designed to improve range of motion, strengthen muscle groups, and restore functional capacity to allow individuals to perform daily activities and improve overall quality of life. The application of therapeutic principles addresses musculoskeletal, neurological, and cardiovascular systems to optimize human physical performance.