susan coleman.thanks for joining us. >> good morning, welcome. >> tell me what hydrospin is all about. who is it for? all fitness levels can do this? >> all fitness levels. we have from 30-something all the way to 70-somethings. it's good for joints, it's good to lose weight. you burn about 800-plus calories. >> 800-plus calories. >> we don't sit on these bikes. normally, we have all kinds of equipment, running back and forth. this is a total body workout. >> i love it, susan. this is awesome. a new mom. just had a baby six weeks ago. she wants to get fit for 2018. we're going to hear how she likes this class as we continue through the hour here on "news4 today." and there are very reasonable rates for folks in prince george's and montgomery county. you can use this aquatic center and come to these classes and get fit for 2018. back to you inside. >> molette, quick question. i know you checked out pretty cool workouts this week. do you have a favorite at this point? >> reporter: you know what, all o