In my opinion, it IS actually impossible to do more than one of those things really effectively at the same time. Even with socialization, any serious commitme

In my opinion, it IS actually impossible to do more than one of those things really effectively at the same time. Even with socialization, any serious commitment to pursue a goal can routinely be detrimental to relationships or social appointments. If you are doing a PhD, then that is your side hustle. Or figure out a way to make make it into one. But you have no bandwidth left for normal side hustles. Prioritizing workouts in this situation is just vanity and poor judgement. With so many other things going on, the minimum needed for adequate health is what you should target. You have to be extremely targeted with your socialization. It should include some video, text or voice meetings for efficiency sometimes. If you are able to keep the job and complete the PhD at the same time, that is a major feat. Not that others haven't done it. But both things can easily demand most of your energy. So one of them probably needs to be somewhat lightweight for it to work out. I don't know a ton about it but maybe you can stretch the PhD out a bit to make it more feasible. If you can somehow manage financially to drop the full time job and you are serious about the PhD, then you should quit that job. Unless it's literally just standing or sitting around with hours every day that you can focus on the PhD while supposedly working. Maybe replace with a part-time job.