"Your brain is designed to focus for 90 minutes."

12 hours of playing legos and not pooping or eating disagrees

Do you take a full break after the 90, or switch to easy work?

I question these types of assertions when they aren’t backed up with references to peer-reviewed studies.

mine lasts until the first slack ping

Huh! That’s great to know. Maybe that’s why the average movie lasts 90 minutes.

Works for talking too. Ask an expert to write and you get a blank page. Ask them to explain their method out loud for 90 minutes and you get the raw material for a chapter. Most people think in speech long before prose.

@grok is your brain "designed to focus for 90 minutes of focus?" Or is the person in the video conflating REM with focus?

Matches my writing days. Somewhere past an hour and a half the sentences get worse and I can feel it happening.

If that's true, a day of back-to-back hour meetings never had a chance. I'd love to know what Kotler thinks a good break between those blocks looks like.