Not every poster on this board must be from the US, or UK. As you may have noticed, there are also other countries in the world, and some foreigners might also speak some English. In many countries it is not possible, or at least financially feasible to leave very young kids at child care and go to work. Almost all she would earn in her profession would be spent on child care, not to speak about other substantial disadvantages if you leave your kids to a stranger to raise them for the majority of the day in their formative years. Kindergardens are available only for kids of 3+ age, and there is a long waiting line.
Anyway, she has quite a nice opportunity everyday to get out the door and run (while I am with kids), but she always finds excuses, why it's not possible. Some are valid (our youngest was up half of the night and she is exhausted), but some are based on lack of willpower and motivation, since running is tough for her and domotivating at such a slow pace.
And it doesn't work both ways with finding time for running, since I am running either when everybody sleeps (at 5AM), or at least when kids have their nap at noon during some weekend days. She is not helping me (in majority of instances) to find time for my running (I would be happy to do my toghest workouts at 5PM and not at 5AM, but I won't even dare to mention it), while I am constantly helping her to find it for her running. I am not complaining about her running, quite the contrary - I urge her to go out and at least walk some with our dog, if she doesn't feel like running. Yet I receive comments and bad looks for my interest in active sports.
In my case, I also rarely go out with friends, I had given up all time consuming hobbies (outside of running, which is limited to 70-90 minutes/day) like mountaneering, skiing, MTB, and rock climbing.
Mostly, I am convinced that it is due to my wife having to be around kids whole day (until I return from work) and it is getting on her brain, which results in a bit too aggresive behaviour. I am sure that many young fathers can relate.