Structured Workout: 40/20 “On/Off” Intervals These "on/off" style intervals will help you push top-end power and cardiovascular adaptations. Chris Case and Ryan Kohler Feb 17th 2021 These “on/off” style intervals will help you push top-end power and cardiovascular adaptations. This content is for Library members only.Listener Membership is FREE. Please join now.Log In Join Now