Can You Get Peak Performance With Little Sleep?

I've been looking into ways to get more out of your sleep -> have to sleep less. I'm curious if it's valid at all?

Can I just optimize the KPIs like REM and deep sleep totals, HRV, LRHR, etc and not worry about the rest?

If my sleep score is bad due to low total sleep, but I still get like 2 hours of REM and deep sleep, does it even matter?

I slept 6.5 hours last night with a fucked up night routine (ate late, lots of bad light, high heart rate) but still got 1.5 hours of REM and close to 2 hours of deep sleep.

My sleep score was 80 which was higher than I would have expected. This made me think about what I could get with an optimized night of sleep.

Basically I'm asking if there's a way to optimize your sleep such that you don't need to sleep that much. And if you can just look at KPIs and not other metrics like restfulness.

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