The best strengthen as a running back is the arms. This is in football.
running back & wide receiver
Gale Sayers or Walter Payton.
Adrian Peterson is the best.
A running back is a position in football in which the ball is hiked to the running back and they then run the ball
A running back is the player on the offense of a football team who is usually running the ball.
The best running back is Tyler Olsen (aka ~T-23~) plays for the south sevier rams!
barry sanders and gale seyers
De' Anthony Thomas
Cardiovascular exercise is the best you can get to prepare yourself for a sport like football. Stretching your muscles is also good because it can help you prevent many kinds of injury, which a running back can sustain.
running back,half back,tail back,