The ankle weights are a decent addition to your healthy lifestyle but I don't think they can supplement actual real intense exercise. Your legs are very strong and 2-5 pounds of extra weight doesn't do a whole lot except slow you down, and may actually decrease intensity.
If you are limited on time try taking just 20 min walks and incorporate some high intensity intervals into that walking routine. And bodyweight resistance training is very effective and can be done mostly at home.
When thinking about exercise always think quality not quantity.
It's lack of faith that makes people afraid of meeting challenges, and I believed in myself. ~Muhammad Ali
You must have long-range goals to keep you from being frustrated by short-range failures. ~Charles C. Noble
July 6th 2010: 225 lbs, 24% body fat
Nov 30th 2010: 181 lbs, 12% body fat
Dec 28th 2010: 177 lbs, 11% bf
Total weight loss 48 lbs.