I was but not so much health as I was playing football on Sundays and footy training once a week. Wellness on the other hand was about how I would handle the change in lifestyle and more importantly how my wife would potentially change/feel.
Thing is, everyone is different and so is your relationships. I'm more of a person that just wanted Hayley to be healthy and able to cope when I was not around. And when I was around I wanted to do everything to make her job easier. It's why I always woke up and sorted both kids out even still now. Even when she breast fed I would want to pass them to her. That also helps if she has a c-section (we had both like that).
Priorities man. Priorities! Without you knowing they just become the most important things next to your wife. So stuff just happens and you don't think twice to give up stuff for them. That didnt mean for me giving up football straight away but when they were old enough to be interactive then you realise how much time you lose out with them when working full time.
I didnt initially but I've now fully realised over recent years that a work/life balance is so important.
I think you can also miss your own time at some points so that's where your situation, support and your relationship strength truly shows. If you or your wife need some chill time e.g. gaming, then you still need that stuff.
Funnily, I can never explain how but it all seems to work out. I imagine everyone just gets used to a new 'normal' life, whatever it is for them.