Let your feet reach the ground heel first,

[Andrew Downing]

Let your feet reach the ground heel first, and then roll your foot downwards from there.Alpha Fuel 720 Tennis players know how to get strong forearms; read on for one of their tips. Lay out a piece of newspaper on a table or other flat surface. Using your dominant hand, crumple the entire paper for thirty seconds.

http://www.supplements4us.com/alpha-fuel-720/