We did a a 2 lap warm up, stretches and 4 400 m runs with a 2 min break in between.
Felt great. Mostly did 1:51, 1:48, 1:47, 1:50.
In the last one was a little out of breath, but spoke to Rajeev and he says my back is ok in terms of form. But need to keep my chin high and control breathing.