Another reason to back your perception of exertion and again helps support why I prefer to programme based on exertion/effort and time. That doesn't mean to say external assessments of speed/power are unimportant - they are crucial in tracking your response to training. This data is from 5,500 training sessions collected over 4 years with 21 professional cyclists from Team Sunweb a hugely successful set up. . . . From the author: . . . it’s the relationship between internal and external metrics that tells you whether you’re getting fitter or overly fatigued. In training, it’s meaningless to know that your internal load is going up or down if you don’t also know whether you’re going faster or slower. In racing, it’s useless or even counterproductive to know what power output you “should” be able to maintain if you don’t also consider how you’re feeling that day. So the message here isn’t that you should ditch your power meter. It’s that you should also trust how you feel—and track it. Those subjective numbers, which it may seem like you’re pulling arbitrarily out of a hat, are trying to tell you something meaningful. . . . #boxingscience #boxing #boxingtraining #boxingvideos #boxingworkout #boxingfans #boxingtalk #boxingfit #conditioning #sprints #sprinting #hiit #highintensity #intervaltraining #sit #sprintinterval #winning #running #runningmotivation #run #runninghype #hiitworkout #runningmotivation #fitnessmotivation #winner #fight #fitnesslife #fitnessjourney #runningman #instarun (at Sheffield) https://www.instagram.com/p/BpWR5bLA5TQ/?utm_source=ig_tumblr_share&igshid=1qfnh555t7t5v