I play soccer twice a week for about two hours. In my opinion, this has been excellent, because there's an unpredictable mix of all-out sprinting and jogging.
I also run on a high-school track by my apartment, and I used to just run around the nieghborhood for about 30 minutes twice a week or so. That was tough, though, because there were some long uphill stretches.
I also run on a high-school track by my apartment, and I used to just run around the nieghborhood for about 30 minutes twice a week or so. That was tough, though, because there were some long uphill stretches.