This is the UPGRADE Medium Pack for people who have purchased the 10 Minute Trainer Heavy Resistance, so really its a downgrade pack to the lighter resistance
If you're one of the busiest people you know, you'll want to accelerate your results with the complete set of 10-Minute Trainer tools. These workouts give you even more of the best of the best-the best and most efficient workouts to get you in the best shape of your life!