Sadly, they will do little to help increase your vertical jump. In fact, you are going to run the risk of injury if you wear these while trying to jump higher. Due to the fact that you need to use your knees to stabilize yourself when landing, the additional weight strapped to your lower leg is actually going to increase the risk of injury when you land. If you are looking to increase your jump, simple and old fashioned practice is going to be the best solution. So, if you are looking to just try and increase your vertical jump, training with these products is going to end up doing more harm than good.