A garment for wearing during monitoring of muscle activity of a subject includes a torso portion defining an interior space configured and adapted to accommodate and cover at least a portion of the subject's torso. The torso portion defines an exterior space external to the interior space. A plurality of access fittings are defined in the torso portion. Each access fitting is configured and adapted to accommodate access to skin of the subject adjacent a muscle group to be monitored by a sensor unit external to the torso portion, such that at least a portion of the sensor unit remains external to the torso portion with the sensor unit accessing the skin via the access fitting.