Answer: When the ball is hiked, the players on the line push against each other. It takes strong calf muscles to do all that pushing, so an exercise like walking on heels can help. Sometimes, players kick a field goal or punt the ball to the other team. An exercise like toe touches looks a lot like kicking or punting. Arm swinging to gain momentum is a big part of running. It seems that running backs could benefit from the arm swings.
Explanation: Edmentum