I think it depends on the work you’re doing! I have worked 60-70 hour weeks before and while it is physically exhausting, I feel very fulfilled and don’t feel burnt out (as long as it does happen often lol).
The key imo is good sleep, good nutrition, having a life outside of work and a job you at least don’t dislike. It is hard to find a job you love, but if you can at least enjoy it then you’re already ahead of most people.
Also become friends with people at your job! Personally, I don’t feel like I am working most days because it’s like im getting paid to work with my closest friends, but I do realize that isn’t super common.