Walker is a difficulty Level I workout you need to make a regular part of your workouts irrespective of your level of fitness. There is good reason for that. Executed using perfect form March Steps will help your body perform better at just about any sport you care to mention by helping improve muscle/tendon cooperation, lower back strength, abdominal strength and lower body muscle endurance. Try it with EC, make it a regular workout you do at least once a week and experience some incredible physical performance gains.
Extra Credit: 1 minute rest between sets.