When you notice that you brome a workaholic it can be hard to take a break. For example if you are used to working with taking a short break, then changing that routine can be hard.
Another example is if you are working a day job and at night your working on your actual dream job or startup. There are many things that you can compromise for overworking. Your health is one main factor.
If you don’t have the energy then how are you going to be able to keep up. I for one do not need more then 5 hours of sleep. But I exercise regularly and do not need more then that. For you it may be a bit different. Therefore not all of us are the same.
To put things in simple perspective remember to take care of yourself. Listen to your body and your soul. If your working on a project or dealing with a client learn how to say ok I”m going to take a break.