How much time of recover for a maximal 400 meters?

Question

after how much time 400 meters maximal it's recovered completely??

Answer 1

If you are speaking of rests between training intervals it should be 10 to 15 minutes.

If you are speaking of racing then it can be from one to three days.

Answer 2

10-15 minutes is way too long between interval sets.

It is "best" to go by your pulse.  However, a lot of people will just go double the time (so if you did a 60 sec 400, rest for 2 minutes) or do a recovery jog around the track.

Good luck.