Haven't yet...I did the 3 mile with the ab belt last night, and will do the 3 mile with wieghts tonight. I have been alternating belt and weights. After the first 3 mile with the wieghts boy was a sore so the last could nights I have had to take it easy with the wieghts and belt. But I am not letting it stop me. 4 pounds and 4 wiegh ins to go before my first goal of 10 pounds by Easter, so walk, walk, walk I go.