I was doing spinning classes twice a week, and in between that doing body pump and bosu class. I started the spinning class back at the end of January to help me with the hills around the neighborhood we live in, and I can honestly say it has! Last year, I was having to walk part way up hills, lol. I also have lost around 9 pounds so far! I did one yesterday after not taking a class for about 3 weeks or so, since I have been riding outside, and I ended up leaving half way through.