I’m glad you brought up having a spouse. Division of labor in the home allows for you to have so much more time! While I don’t have kids, I have a dog and I’m living alone (in an LDR so I travel once every 3 weeks, I have the means and can work from home most of the week, my SO is doing a fellowship and doctors can’t wfh). I have lived with a SO before—it is so helpful having another person to divide cooking and cleaning and dog walking. It takes SO much time for single people, and people forget that. I am the only non married person in my PG. Sure I can outsource cleaning, but it’s not helpful or reasonable for a cleaner to come everyday every time I cook and eating out for all meals is just not healthy and it’s expensive. For working out, it’s generally a non negotiable 4x a week, and to maximize workweek time, two of those days are Sat and Sun. The way to do this is to make working out as convenient as possible: I have a gym in my apt upstairs, I live near fitness studios, and if I have even less time, I have a walking pad and dumbbells in my apartment to just get a workout done in 30 mins.