sleepwhenidle I'd lost about 7 stone and wanted to get fit, so I got my nerve together and joined a gym and for the first time in my life took them up on their introductory PT sessions. He gave me an enjoyable yet wimpy weights regime.
I found I really enjoyed putting the weights up week after week and then started the Google... And then it kind of all fell in to place - 'free' calorie burning just by simply being present (muscles I mean).
And I'm a skiier and rider, as I said before my posture improved greatly and I had greater core strength and balance across my torso. The muscles in my legs and abs meant that my skiing was better (not technically perhaps, but I had more stamina and confidence). And the horse didn't fuck around as much when I had thighs of steel! ;)
There's also perhaps the fact that I am essentially lazy and uncoordinated. Weights do not require fancy footwork and even if I do my 'full' weights work-out and HIIT I can still be in and out in an hour.
Like so many others I saw bums wobbling week after week on the bikes... And I saw the women on the machines looking sculpted and strong - didn't take too much to put 2+2 together.
As an aside though, I have always been very strong and I build muscle easily, so perhaps this is better suited to my body than a woman who is very, very slight and weighs 6 stone wet.
Oh dear, I'm waxing lyrical about something I can't yet do.
Btw, I would put my almost non-existent baby bumps down to strong abs. My mw told me with number 1 that it was difficult to feel the baby due to the muscle mass.