I can’t read the article, it’s behind a paywall. It depends a lot on what the work is. If I’m talking to people in different departments about various issues,

I can’t read the article, it’s behind a paywall. It depends a lot on what the work is. If I’m talking to people in different departments about various issues, I find I can still pull a full day. Even coding, I can still be productive if it’s a lot of boilerplate or checking off possible causes for a bug. It’s when it gets to deeply complex technical tasks that I find it becomes worse than useless to put in that time. That being said, I’ve found that around 70 hours in a week of coding, my mind just shuts down. This all assumes I’m engaged in what I’m determined - if I have doubts that the time I’m spending is in my self-interest as well as my employers, it’s a lot harder for me to stay motivated past what I have to do.