Hi I am a 67 year young female. I workout about 6X a week. I a home-made sport drink after my workout. My question is why am I drained. I feel good during my workout but when I finish I am drained. I workout at home with Leslie Sansone's Walk At Home/ Walk Away the Pounds DVD with weights, 2 or 3 pound weight. About a year ago I used to run and workout for 45 mins, now 30 mins fast walk is it. I've workout for years but now I'm wondering if I should slow down or stop. I really don't want to do either I love to exercise, I get natural high. At one time I was into weight lifting, would love to get back into it. What solution should I use. Oh yes I am about 50 lbs over weight but I was that weight before and I was still able to lose and continue exercising. Life happens and the first of November 2012, I had stop exercise for 6 due to a shoulder injury and can't seem to get back to where I was in October 2012.