The Upgraded Parachute Provides You With The Perfect Solution To Quickly And Safely Increase Your Running Speed And Acceleration. By Using Parachute Training The Training Difficulty Gradually Increases The Endurance Of The Leg Muscles Is Continuously Improved And The Acceleration Is Perfectly Improved. More And More Athletes Are Using Parachutes For Speed Training Including Athletics Mountain Biking Skating Basketball Football Soccer And Other Ball Sports. When You Start Running And The Speed Increases The Parachute Will Open To The Maximum And The Resistance Will Increase. Try Not To Drag The Parachute Into The Ground During Training As This May Damage The Parachute.