Curl. >> all the time working your core, because you have to keep your balance. >> the entire time, this unit here, you can use as a stepper. so i would be stepping on and off this, from here you could even jog in the elevated position. really super, super workout. easy on your joints. and you can use it as a device whether you want to do pushups, situps. >> all you need is just one urban rebounder and you can have loads of fun by yourself in your house. j.b., thank you for being here. >> thank you. since we're talking about getting into shape, why not discuss some diets that will keep you t...