I think it depends on your job how much work you can handle until being stressed. If you love your job I think you will be able to spend more time on it because your motivation is higher.
But I agree with the point that whether you love something or you don’t, if you‘re working too long and have too short breaks, your brain won‘t be able to memorize all of the information like doing smaller steps.
Thank you for this article. Greetings :)