Running vs. Hiking: The Science of Pacing Steep Climbs

​​Free Ultrarunning Training Assessment At what grade should an ultrarunner stop running and start hiking? 10%? 12%? 15%? There isn't a universal answer. CTS Director of Coaching Cliff Pittman examines the physiology behind running versus hiking on steep terrain. He explains how cost of transport changes with grade and speed, why walking becomes more economical under certain conditions, and why running economy is only part of the equation once muscular fatigue accumulates deep into an ultra...