ae you crazy? No lets just hazard a guess and try something in a race rather than training:rolleyes: …oops too late, already done that 
This season I have usually been running a 100m then a 400m 75 minutes later, times have been consistent (6 of 8 within .5 sec of each other) but no PB’s.
Last night I ran a 200m race as a long warmup 15 mins before 400m. Deliberately didn’t push too hard, fast relaxed, and eased up into line from about 10m out. Time was about 93- 95% of what I expect it would have been normally (best 200m conditions of the season :o) I recovered pretty quickly and felt fine for 400m (not puffing etc) last 100m felt in super slow motion but time wasn’t as bad as I thought it may have been. 99.69 of last weeks time and 98.94 of SB in mid December.