Each pound of body weight costs you 1 to 2 seconds per mile. For a marathon, a least-squared statistical analysis show 1.4 seconds per pound per mile, which works about to be about 0.6 minutes per pound of excess body weight for the whole marathon. So if you're up 20 pounds, you would run the marathon 12 minutes slower.
Of course, this is just a statistical average. Some runners will do better with the extra weight, some will do worse.
My weight has been very up and down over my adult lifetime. In 2000, I lost 65 pounds and have kept it off, hopefully to never regain it (knock on wood).
Post a reply on the Bulletin Board | Send email reply to Dr. Z