A good, average running back will run a 4.5 or 4.6
4.40 TO 4.50
the average speed is a 7.1 60 yard dash.
40 yard dash/10 yard dash= 4 What ever the time you got for the ten yard, you multiple it by 4. It could be an average of your running time per 10 yard dash. Sometimes for several runners, they would feel worn out by the time when reaching the 40 yard mark.
Speed Back: 4.3 Power Back: 4.4
Chris ran a 4.24 in the 40 yard dash GO TITANS Beat The Colts
i have heard that a fit running back in the nfl should run at most a 4.3 or 4.4
Around 5.2. If you run lower than that then you should play running back....
EMMITT SMITH ONLY RAN A 4.8 IN HIS 40 YARD DASH AT HIS COLLEGE COMBINE....BUT IS STILL THE GREATEST RUNNING BACK ALIVE