Assuming the worst case scenario, with the athlete running near PB in the preliminary round in order to qualify for the final a couple of hours later.
What to do immediately after, in between and warming up for the second run. I’d like to hear your thoughts.
Warm down. Take a supplement stack (carbs, creatine etc) that helps with recovery from that kind of work (i have my own that i mix up - sorry personal secret!). You could also experiment with an ice bath. Do a shorter warm up for round 2 but get the blood flowing rather than a neural stim type thing.
Try using carbonated water between rounds
maltodrextrin, bcaa, glutamine, sodium bicarbonate (thoughts?), light self massage, contrast shower, micro stretching, …
and make sure that athlete won’t just lie on track after heats.
Make him walk around the track it’s alot better IMO