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.
Probably the last one. It's the least realistic way to make your body healthy. If you are going to do exercise and make yourself healthy, friends would be helpful in that process and exercising is definitely a good way to be healthy.
