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Humans have long and hard strived to be run faster and jump higher. Now that can be achieved for a little over $300! Welcome the Powerizers:

Strap Powerizers on and you will be able to jump 2m (7ft) in the air, leap 3m (10ft) for every stride and run at speeds of 20mph. Powerizers work like a super-muscle, enhancing your natural strength. Curved springs attach to the bottom of the Powerizers and harness the gravitational energy that is created when your weight is forced down. The super-charged springs then push back with extreme force causing you to walk, run and jump like never before. (Video)

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Sufficient crash protection and a reasonable amount of common sense are expected when using this product.