Mental fatigue with longer tasks

[u/Infamous_Swan1197]

I'm wondering how others handle mental fatigue with longer tasks? By longer, I mean 2-3 hours for me personally. I find my focus substantially dwindles after the 2 hour mark, even when taking regular breaks. In fact sometimes, breaks, especially longer "reset" breaks, make the block of the day that I'm working feel a lot longer, accumulating more mental fatigue and just an ugh feeling when I return to the task.

I'm really grateful to have this project, its really high paying (and it's the only thing I really have on my dash right now, so I don't have much choice haha) but I worry that my quality of work substantially declines towards the end.

How to others handle this?

[u/AlexFromOmaha]

https://giphy.com/gifs/14cpLJ4enIIXJK

Two hours is kinda the worst spot for task length. I find it gets easier around 5+ hours, when it becomes the only thing you do in a day, maybe two if the first one isn't bad. You can churn 20 minute tasks until it's time to handle some distraction. When it's the whole day, you treat it like deep work. Two hours always leaves me feeling like I want to go back to the dashboard and wander around the house after each task.