Fig. 4From: Supporting front crawl swimming in paraplegics using electrical stimulation: a feasibility studya IMU alignment and location on the left leg. The local x-axes are aligned with the longitudinal body axis. The z-axis points laterally to the left. b IMU alignment and location on the upper and lower back. The local x-axis is aligned with the longitudinal body axis, while the y-axis points to the rightBack to article page