I definitely want to look into doing pilates when the weather gets bad or when I get too unbalanced to enjoy bicycling for fun. I generally prefer incorporating exercise into daily life, such as using a rotary mower instead of a power mower, people-powered transportation rather than gasoline powered transportation, etc. to going to the gym to work out, but now that I'm going to be an older mother I really do want to start taking better care of my body.
When my teens were toddlers and preschoolers, most of my mommy friends were in their forties and I remember how they would mostly sit and talk at the park while I could easily shift gears from talking to running around and playing with the kids. I also loved getting down on my hands and knees, putting both toddler/preschoolers on my back, and playing horsey. I roughoused with my boy until he was 12 or 13.
Many times when I was younger, I said that I absolutely wanted to be "done" having kids by the time I was 35. My main reason was that I didn't think I would be physically up to the kind of active play I enjoyed with my kids in my 20s.
Now I understand that it doesn't have to be that way and if we take care of our bodies, age doesn't have to mean less activity. I actually enjoy exercise much more now than I did when I was younger. I'm willing to work on keeping my body in shape so that I can enjoy playing horsey at 46, swinging on the swings at 50, and maybe hiking the Appalachian Trail or going on a cross-country bicycle trip with both daughters and some grandkids at 60.