Mental health and physical health tend to be a two-way street — each can affect the other. Having PTSD can affect both, but recent research suggests some of the physical harms associated with PTSD may be the fault of another culprit.

Have you ever felt a "runner's high," that relaxing, happy feeling after a bout of exercise? Research shows that it could be an effective treatment for some types of anxiety.

Some individuals use yoga for fitness, some for relaxation and some for spiritual reasons. Another possible benefit of practicing yoga is improved mental health.