For centuries, athletes have run hurdles to improve their stride and agility. Now, Stroops has taken this timeless tool and loaded it with 21st-century features. Stroops Hurdles offer a full range of plyometric training benefits, from improving stride frequency and foot placement to strengthening the dorsiflexion muscles used in sprinting. Invest one time in a set of lightweight, stackable and portable hurdles designed to withstand years of abuse. Unlike tubular or flat PVC hurdles, which break easily, ours are made of highly durable yet pliable plastic. The smooth white surface allows coaches to write instructions on them using erasable markers.