Better clear up my comment.
If you wanted to start with split runs over a 100m I would do
2 x 3 x 100m, with 60-90 sec recovery between 100 and full recovery between sets for x weeks (I reckon 3 weeks is enough) than move to 2 x 2 x 150 (same recovery) for x weeks etc…
So no it isn’t in one session.