First high jump was my bro grant at 1.70m and javelin is me, I threw around 40m and no idea what to fix on it.. And my high jump form Is terrible I know. I should be arching my back and idk why but I ...

If you want me to coach you personally to jump higher click here: If you want a FREE week of jump training click here: My name is Isaiah Rivera and I have the highest officially tested vertical on the ...