Running or speed parachutes are great for increasing speed and strength.How to use. Attach to a harness around your waist to start.Start slow then increase your speed, as you increase the speed the chute will expand. When the chute expands it creates drag from the air and forces you to run harder which helps build overall speed and strength. The nylon parachutes are designed to expand as you speed up. Runners using parachutes create wind resistance even on a day when it isn't windy at all. This product is Ideal for elite and amateur athletes in improving explosive strength and reactions. Parachutes will help you build strength while running. They work by combining resistance training and interval training naturally in your workout. Wind resistance training helps build strength in large-muscle groups, increasing your overall performance in speed sports like athletics, rugby, football, cricket, hockey and tennis. Most sports were explosive movement is needed. This form of training is ideal for athletes seeking to develop explosive speed are the most natural beneficiaries of training with parachutes. Health and safety. Remember that if you run on a windy day you want have the same readings and your workout will increase very fast. We recommend you consult a doctor before starting any parachute training. A high level of fitness is required. Always check your chute before training, make sure no tears or holes are in the chute.