Tie between Javon Ringer and Jehu Caulcrick
The best strengthen as a running back is the arms. This is in football.
running back & wide receiver
the best running back in college football my top 5 list is probably 5 Bo Jackson 4 Tony Dorsett 3 Herschel Walker 2 Doak Walker 1 Archie Griffin
Gale Sayers or Walter Payton.
The best running back is Tyler Olsen (aka ~T-23~) plays for the south sevier rams!
barry sanders and gale seyers
De' Anthony Thomas
Priest Holmes, Landnien Tomlison, Darren Mcfadden
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.