100/200 meter sprinters....in training, how long?

When I coach 100/200 runners the longest continuous run they do is an 800m warmup.

Then you are behind the times, because what's in these days is just a series of stride-throughs over 40-80 meters. Bolt doesn't jog warmups at all.400 meter guys need to do a little continuous running of 20-30 minutes in the fall. But a single continuous run for a sprinter is about the stupidest thing a sprinter can do--all it does is train the CNS to put out less juice for a longer period of time, which is the opposite of what a sprinter wants--and so people don't do this since the 1960's. Some sprinters (Bolt in the winter) do intensive tempo like 300-450 meters at 80-90% in anywhere from 3-6 runs with 3-5 minutes rest. Others do special endurance of 150-300 meters at 90-95% with long rests as long as 30 minutes for Ben Johnson.

I’ve had several sub-10 athletes who NEVER ran anything further than 150m in training. Now there are systems where athletes run 500, 400, 300 and do intensive tempo 10x200m and all that kind of stuff and they are very successful but the way we train and package things we try and see how little we can do to get the maximum results because we want to minimize the injury risk and maximize the use of the time we have available.

--Dan Pfaff

If you are a runner it doesn't hurt to run some longer stuff. It was more about fitness and grooving in technique.

But race wise I used to run 100 - 400 and never bothered to work over 300 in the season.

150 is a good distance to train for 100 and 200 runner.