Unfortunately I haven't done any weight training since college. I do keep active so I'm not out of shape, but without the weight training I'm sure I've lost plenty of muscle over the years. I know I've read many times that as we get older, muscle training is actually more important than aerobic (though of course it's ideal to do both) but I have ignored the advice, using the excuse of a lack of time.

I should go look for a kettlebell at the store. Great idea!