I've done some intervals yesterday.

Here's a sample of the workout:

...
450w x 1 min
210w x 1 min
300w x 1 min
210w x 1 min
400w x 1 min
...

When working at 450w, heart rate peaks at around 172bmp at the end of the minute. My max heart rate is around 183bpm.

I then slow down to 210w for a minute, but hr stays high at around 160 at the end of the minute.

Next interval was at 300w, so a fair bit higher but the heart rate stays flat at 160bpm.

Next interval at 210w, hr was still at 160bpm during the entire minute.

My hr go up to 170 during the 400w interval.

My question: is there a method/way of training to recover better after hard effort ? I expected to get a good recovery at 210w but it is not better than the 300w interval. Not sure if I explain it clearly...

Thanks.