Members at Curves, a fitness center designed exclusively for women, rotate around a circuit of hydraulic resistance machines designed to work with female bodies and promote weight loss, protect against osteoporosis, and deal with arthritis. An experienced trainer is always nearby to help to manage participants’ machine maneuvering and muscle making. Instead of fiddling with weight stacks and losing momentum, the hydraulic machines use participants' own body weight, fitness level, and aerodynamic water bottles to create resistance that matches abilities, decreasing the risk of soreness or injury. Because traditional lift-and-lower motions create bulky muscles, each machine uses push-and-pull motions to create toned, lean muscles perfect for crushing a grapefruit without looking like you can. Between each weight station lies a recovery board where ladies cool down while walking, jogging, or running in place to keep up momentum. With each workout warrior at a different station, the only competition that exists is with one's own burgeoning muscles.