The moderator's suggestion of incorporating walk breaks is a great idea. If you have already been running for a little while, try using 10 and 1's. Run 10 minutes, walk 1 minute. At first it might be hard on your ego, but it pays off in the long run.
Some people have even finished 10ks, marathons, etc... in quicker times by using walk breaks.
My wife went from walking 1 min/ run 1 min to running a 5k without walking. Not to say walking is bad. I still incorporate walk breaks in my longer runs.
Make sure you give yourself (and your legs) some days off. You can run two days in a row, but make sure you have some rest days. If you want running to be part of your weight maintenance plan, it would be nice to be able to do it for many years.
Keep track of your weekly mileage and don't increase it by more than 10%. And on individual runs, don't increase the run time by too much, either. Even though your cardiovascular system might be prepared to go an extra 20 minutes, that doesn't mean your legs are prepared.
And don't forget stretching. It's very important. I personally do not stretch enough. I get impatient and end up doing a half-hearted attempt at it.
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