Strength shoes are shoes that have raised platforms in their front. They are supposed to increase your calf size, strengthen the Achilles tendon, increase your fast twitch muscles, improve vertical jump by up to 5 to 10 inches and reduce your time in the 40 yard dash.
The theory is that up to 30% of your vertical jump and sprinting ability comes from your calves and forefoot, therefore any equipment that isolates these muscles while you work out will bring about greater than proportionate gains in jumping and sprinting.
