I have been an avid runner for the past 6 years. I try to run 4-7 miles 5 days a week. However, I can truely empathize with the feeling of "pure crap" during a run. According to the ACSM guidelines for exercise testing and prescription, you don't necessarily have to run to gain cardiovascular endurance and get back into shape. If running isn't for you, there are alternate modes of exercise that can give just as good of results. For example, I find that on days when I run for 5 minutes and feel like I'm going to die, I switch and do the elliptical machine for the remainder of my workout. However, if you are determined to run, the main focus is simply to start out at a low to moderate intensity. As your body begins to adapt to getting back into shape, you will find that you are able to increase the speed and duration without too much trouble. Results do take time, so be patient and keep up the motivation to do your best, whatever the mode of exercise may be.
