Description: When you use the resistance chute to exercise, the resistance of the air will produce an backward drag force, so the faster you run, the greater the drag force. Through this exercise, can improve the ability of the user's acceleration, muscle endurance, and enhance the ability to adjust the direction of the high-speed running. Feature: 40" diameter 15 lbs of resistance Fits all sizes (up to a 42" waist) Fully functional unit includes parachute and belt. FREE STARTER TRAINING GUIDE INCLUDED Suggestion：long-distance running Package include:.
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