Figure 1From: Can a physical activity monitor provide a valid measure of arm elevation angle? A study to assess agreement between the SenseWear Mini Armband and the universal goniometerTheoretical longitudinal accelerometer data associated with displacement of the SMA with respect to gravity. The longitudinal axis of the SMA is the theoretical line joining the top and bottom of the device. F: front (outer face) of device; B: back (inner face) of device.Back to article page