Resistance parachutes attach around the waist or chest and create drag to increase the intensity of runs. They are commonly used by coaches to build speed, strength, and explosive power in athletes like football and soccer players. While they are effective for improving speed and strength, parachute training should be incorporated periodically with other forms of resistance training for the best results and injury prevention. Consistent parachute training over a month can lower 100m sprint times by 0.05-0.1 seconds, closing the gap on competitors.