Speed Helperexperiments Have Shown That Two 56-Inch Diameter Parachute Can Produces 26-60 Pounds Of Resistance.The Faster The Speed, The Greater The Resistance Will Be.Use Of This Resistance Training Chute Will Make Your Speed Breakthroughs. .Upgrade Buckle Beltwith Adjustable Heavy-Duty Nylon Belt Suitable for Almost Any Athlete, Plug and Play, Convenient and Fast. The Metal D-Ring Rotates 360 Degrees, Which Means You Can Sprint In Any Direction. .Powerful Resistancethe Running Parachute Can Provides Excellent Resistance Training for Improved Speed, Stamina, Strength, and Acceleration Chute Releases While Running for Overspeed Training. .Multi-Purpose Used :Whether Youre In Track and Field, Football, Soccer, Basketball, or Any Other Sport,and The Speed Training Parachute Effectively Promotes Explosiveness and Stamina That Is Vital In Field and Track Sports .