Lace up those running shoes! To boost your endurance, alternate a few minutes of jogging and walking, each week jogging a little more. Rest a few days in between workouts.
walk jog
day 1 day 2 day 3
week 1 week 2 J © 1 min 1 '/2 min Total = 20 min * * © M/2 2 Total - 21 min J © 1 min 1 '/2