How to add a few more inches to your running vertical jump in less than two weeks Train your hip flexors for just 3 minutes a day and watch your leaping ability soar! Hey, basketball players, does your vertical jump coach have you training your “Pectineus” muscles? or “Sartorius” muscles? SAY WHAT? Why do I need to train these muscles? I didn’t know they even existed! Read carefully. If you want to increase vertical jump height as much as possible and increase running speed as much as you can, then you need to read this article. Two Most Important Muscles… read more