Podiatry, more appropriately "podiatric medicine" is a field of healthcare devoted to the study and treatment of disorders of the foot, ankle, and the knee, leg and hip (collectively known as the lower extremity). The range of disorders podiatry can address largely depends on the scope of practice laid down in national, state, and/or provincial jurisdiction.

A podiatrist, (pronounced "poh-dye-eh-trist") or foot doctor is a podiatric professional, a person devoted to the study and medical treatment of disorders of the foot, ankle and lower extremity. The term originated in North America but has now become the accepted term in the English speaking world for podiatric medical school graduates: Doctors of Podiatric Medicine (D.P.M.).

In other countries, such as the United Kingdom, New Zealand, and certain provinces of Canada, the title "Chiropodist" is often used. It should be noted that the titles "podiatrist" and "chiropodist" are interchangeable, with the term “podiatrist” becoming more favoured within the profession. Completing a degree in the United Kingdom from one of its thirteen schools, gives the graduate a BSc (hons) in podiatry. However they may not call themselves a “podiatrist” or “chiropodist” until they register with the Health professions Council (HPC) as they are protected titles and anyone using these titles that are not registered may face prosecution. In these countries a chiropodist or podiatrist is an allied health professional (not a physician), who generally only treat the foot, ankle, and lower extremity through non-invasive procedures. They can however perform minor surgical procedures such as nail surgery using local anaesthetics. The United States is one of the few countries, which grants more invasive surgical privileges to podiatric physicians

Though the title "chiropodist" was previously used in the United States to designate what is now known as a "podiatrist," the title "chiropodist" is now considered to be an antiquated and etymologically incorrect term. [From Wikipedia]

Psychology (from Greek, literally "to talk about the soul", from ψυχή, "psyche", soul, and λόγος, "logos") is both an academic and applied discipline involving the scientific study of mental processes and behavior.

Psychologists study such phenomena as perception, cognition, emotion, personality, behavior, and interpersonal relationships. Psychology also refers to the application of such knowledge to various spheres of human activity, including issues related to daily life—e.g. family, education, and work—and the treatment of mental health problems.

Psychology is one of the behavioral sciences—a broad field that spans the social and natural sciences.

Psychology attempts to understand the role human behavior plays in social dynamics while incorporating physiological and neurological processes into its conceptions of mental functioning.

Psychology includes many sub-fields of study and application concerned with such areas as human development, sports, health, industry, law, and spirituality. [From Wikipedia]

Exercise physiology draws together exercise science and physiology in the study of how the body adapts to physical movement. It is believed to have originated in ancient Greece by Herodicus.

Topics studied in exercise physiology include human energy transfer, human energy expenditure, evaluation of energy-generating capacities, the nervous system pulmonary system, the cardiovascular system, the musculoskeletal system, endocrine system (including hormones) and the interaction of these, plus training methods, environmental effects on physiology, and ergogenic aids.

Exercise physiologists tend to specialise into either health and fitness or exercise rehabilitation streams with exercise used as a treatment strategy in physical rehabilitation, prevention of disease, and work conditioning. [From Wikipedia]