SO when you pitch at full speed do you keep your arm.....?

Do you keep your arm as loose as possible or do you tighten it (isometrically)?

I for one tighten my arm which makes me throw harder. When i keep it lose I really cant throw as hard as I can.

Any answers would be cool. :stuck_out_tongue:

i guess it depends iā€™d rather keep mine loose like a whip but if it doenst hurt your arm and you throw hard why not.