Abstract: The invention provides a gym system including a plurality of stationary devices. The plurality of stationary devices is configured to establish a host monitor zone for exchanging received signal strength indicator (RSSI) values from at least one exercise portable sensor of exercise portable sensors, thereby avoiding the wireless pairing fails. The at least one of the stationary devices process the RSSI values under the host monitor zone to determine a distance status in relation to a location between the at least one exercise portable sensor and the at least one of the stationary devices to avoid the wireless pairing fails between the at least one exercise portable sensor and the at least one stationary device, so that the at least one exercise portable sensor is paired with a corresponding one of the stationary devices in a stationary device-specific exercise area.