Is This Interval System BETTER than what 99% of Runners are using?

Free training for runners over 50: https://coachparry.com/uy6p-Free-Training In this video, sports scientists Lindsey Parry & Devlin Eyden delve into Coach Parry's JIT Interval system to see if it's better than what the majority of runners are using. We've added a few more examples of our JIT Intervals for you to check out here: https://coachparry.com/jit-intervals/