Apsychologist is studying various behavioral and psychological factors linked to a variety of illnesses, such as cancer. this is an example of psychology.

Healthy psychology: Health psychologists are interested in improving health across a wide variety of domains. These professionals not only promote healthy behaviors, they also work on the prevention and treatment of illness and disease. They might research how people cope with illnesses and help patients look for new, more effective coping strategies. Some professionals in this field help design prevention and public awareness programs, while others work within the government to improve health care policies.

Maybe it is yoga , stretches, push ups, sit up etc