PTSD stopped me from being able to exercise. Things like yoga, wall-sits, stretches, that all turned my brain into fuzz. Contorting my body and twisting it and holding it. I couldn't. I've found it easier to just walk, martial arts, swim, scoot. I'm physically disabled so within the realm of my disability you know. It doesn't feel like exercise but it is activity and that's good for you. Rock climbing, ice skating, skateboarding, rollerblading. Things that require skill and talent and competition and focus and that helps because I focus on that and not on my body.