I have always been active as a young child and had no health issues. After about 5 years of moderately active, I have, at age 27 started back on a very active lifestyle. Boot camp type workouts. I am 5 8 and weigh 125lbs. Eat healthy , female on no medications . within 2 months of starting my current exercise regiment, my ankles started swelling up after every strenuous activity or even 3 hrs of continuously being on my feet . I can barely tolerate running straight for 3 minutes, (and I used to do track and cross country) without panting and heaving, almost to a groan and going all dizzy. what could be the issue here? I have seen a doctor and still waiting for blood test results . Other than that, I have no clue why my body is responding in this way.