D.G.
S. - one of the things I add to my exercises is weighted agility gloves from www.drazathletics.com. It's like doing 2 things at once (we mom's are used to that). I wear them when I power walk, I wear them when I do an exercise video. It ads a little weight to the hands - much easier than carrying 2 lb weights in my hands when I walk/run.
Good luck