...things change. slowly first. Even tho I'm still early on (16 weeks) it has been a very interesting and also a challenging experience already. I have, had, a very set regimen when it comes to my physical activities. My partner makes me push myself to the limit all the time, as I try to keep up with him, and I like that kind of stress/challenge. As the weeks go by with my pregnancy I was able to adapt my way of thinking. It was not about being my strongest anymore, not about keeping up and getting stronger. It became about staying healthy.
At first it felt strange and disappointing, that you couldn't do certain things as aggressive or intense anymore. With bouldering for example I am very careful to not tackle any too high boulders. I am a very clumsy person, who doesn't quite know how to fall properly. My limps just flop around uncontrollable. So now, having a responsibility to grow a healthy baby, I stick with very easy problems, minimizing risks of injury. Sometimes i would even just lay back and watch only or do some squats and push ups instead, if the hike to the boulders haven't already exhausted me.
And this is just one example which translates to all the things I love doing, and there a lot. What I found so far was pretty enlightening, tho obvious. As much as I enjoy competition or challenges and taking some risks, I find myself enjoying my activities in a more meditative way. I am more aware of my beautiful surroundings, body and soul seem to be better connected. I seem to go into any activity in a more relaxed way, less aggressive ("i have to get this route, i have to ride this trail"). Maybe that is the glow that people talk about that pregnant women seem to carry. The glow of relaxation, being more at peace (unless some of the unpleasant side effects are bothering you a lot. Tho i see a trend in active women having less of those, at least within my circle of people). Never forget to have fun and listen to your body and common sense.