Derek A Willis is a Chester, New York based male physical therapist who is specialized in Physical Therapy. Active license number of Derek A Willis as Physical Therapist is 036045 in New York. Derek A Willis evaluate and treat people with health problems resulting from injury or disease. He assess joint motion, muscle strength and endurance, function of heart and lungs, and performance of activities required in daily living, among other responsibilities. Treatment includes therapeutic exercises, cardiovascular endurance training, and training in activities of daily living. Physical therapists treat disease, injury, or loss of a bodily part by physical means, such as the application of light, heat, cold, water, electricity, massage and exercise. They develop treatment plans based upon each patient's strengths, weaknesses, range of motion and ability to function. Physical therapy is a health care field concerned primarily with the treatment of disorders with physical agents and methods, such as massage, manipulation, therapeutic exercises, cold, heat (including short-wave, microwave, and ultrasonic diathermy), hydrotherapy, electric stimulation and light to assist in rehabilitating patients and in restoring normal function after an illness or injury.