Master the powerful lower body exercise that all physical monsters do! (How to run fast, jump high) 

This in an incredibly difficult exercise that uses
posterior chain without needing to use exercise gears.
[What is posterior chain?]
The role of posterior chain is very important. Posterior is used from daily life
activities such as running, jumping, and changing directions to the areas of
sport athletes. In fact, posterior chain takes a big role in the safety of knees, hips and spines, so not only can it generate body strength, but it can also reduce risk of receiving physical injuries.
*Caution! : This video was made to provide information. It is not a medical advise. If necessary, consult an expert like a doctor.