I used to be fit, running, cycling, partner acrobatics, etc. But I have done very little cardio, strength, or flexibility training since our wonderful daughter came along. She doesn’t sleep well so part of the problem is energy. But the main issue is finding time. My partner and I both work remotely, I have a 08:00-16:30 tech job and my partner teaches music online in the evenings. So I’m either working, playing with my daughter, or exhausted. I’m not complaining, I love my life and being a dad. I want to stay fit and healthy so I can be my daughter’s father for as long as possible. I also don’t want to be hard on myself, I know these toddler years will fly past if I’m not mindful. How do other parents maintain fitness? We don’t have any extended family close.
A bit in line with what others said, find a way to take turns with your partner. Not only you will find the time to workout or whatever, but also you should not be sentenced to suffer the full frustration together. It is not necessary and doesn’t help anyone. Eventually things may grow stale and you can end up in a cabin fever scenario. Find small windows of time for each one to do other things too, it will help you maintain your mental health.