Biking and hiking really haven't kept me as firm as I like. After I had back surgery, I stopped doing squats and weights in my gym.

I recently started using the gym ball and bands, and cannot believe in just one month, twice a week, doing eight exercises X 2 sets, what a difference!!!

The bands come in Yellow (easiest), green, blue and black, in order of difficulty. Look up the monster exercise, it is really hard!