I lost weight on 15-20 miles per day as well. Also have lost a bunch of weight (or at least replaced fat with muscle) from just doing 10-15 minutes of PT exerc

I lost weight on 15-20 miles per day as well. Also have lost a bunch of weight (or at least replaced fat with muscle) from just doing 10-15 minutes of PT exercises (strength training, stretching, and yoga) plus walking an extra mile or two per day.