Yellow offers 3 lbs. of resistance when stretched to 1.5 times its normal length, and is recommended for beginners
Green offers 6 lbs. of resistance when stretched to 1.5 times its normal length, and is recommended for moderatly fit beginners
Editorial Reviews:
Synopsis
The original SPRI step tube adds a new dimension to your step exercise platform. A rubber sleeve protects this tube from abrasive step surfaces, giving serious steppers the perfect way to add a variety of strength training options to their cardio workouts.
Please
consult with your
physician or health care provider before starting any new exercise equipment program.