Members at Curves roll through a circuit of hydraulic resistance machines that have been 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 manage participants’ machine maneuvering and muscle making. Instead of fiddling with weight stacks and losing momentum, the hydraulic machines utilize body weight, decreasing the risk of soreness or injury. For 30 minutes, limbering ladies move around a circuit that positions machines inward so that they'll have a chance to share laughs and secret handshakes with fellow fitness frontierswomen. Because each workout warrior occupies a different station, the only competition that exists is with one's own burgeoning muscles and mind.