Putting together a sprint session (Comprising of 10,20,30,40 m),what sort of volume in terms of reps and sets should I use, and what about length of rest ?
Also is it worth building it up over a number of weeks? e.g.
Week 1: X reps at 10m
Week 2: Y reps at 10m, Z reps at 20m
Week 3: B reps at 10m, A reps at 20m, V reps at 30m
Week 4: Back off
Looking at 1-2 sessions a week max