To be honest you will still need to train in all sorts of things. Obviously cardiovascular machines are great for endurance and working on your stamina, so a the running machine, rowing machine, hill climbers etc will be useful.
But do not rule out the use of weights. There are several weight machines to increase leg muscle which is useful, dumbells should be sufficient for your arms, and of course a trim tummy is needed via sit ups/crunchs.
Personally, i run 200m and iv never used a treadmill as they make me pretty ill, I'd much rather go down the park and run sprints or do some circuits.