Figure 4From: An evaluation of the 30-s chair stand test in older adults: frailty detection based on kinematic parameters from a single inertial unitMovement patterns of raw MTx signals (Z-position, X-orientation, Z-acceleration) for frail (a), pre-frail (b), and healthy subjects (c). The circle outlines the extra forward and backward lean for more frail subjects and the arrows features the time duration and X-orientation range.Back to article page