The importance of sleep

[Aegon]

It's true that not getting enough sleep during the week is bad, but studies show you can make up the deficit on the weekends.

I think the sleep studying community is still conflicted on that. Walker doesn't agree.

• One hour of smart phone use will delay the onset of melatonin production by about 3 hours. Your peak melatonin levels will also be 50% less
  

@Matthew Walker.
This is a testable claim. Where is the research?

I don't think he frequents Atheist Forums.