How many reps do i do if i do 5 sets?

Question

How many reps do i do if i do 5 sets?

Answer 1

i don't know....

Answer 2

That depends on the distance and the goal.  If you are looking to improve your sprinting do 4 repeats of a short distance with a lot of rest and recovery.  If want to improve your endurance can still do 4 repeats but you want it to be long distance and little rest.