Table 1.

Experimental procedures used for ADL and FA for each subject in this study.

Activities		Procedures of Trials
Activities of Daily Living (ADL)	(a) Stand-Sit-Stand (SSS)	Trial 1 (standing postural calibration). All nine MTx sensor modules were attached. Calibration for each subject was needed to be performed in standing posture prior starting a new group of activities. Trials 2–4 (SSS_1, SSS_2, SSS_3). Each subject performed the stand-sit-stand activity. The chair height was 50 cm.
	(b) Walking (Walk)	Trial 5 (walking calibration). The same as Trial 1. Trials 6–8 (W_1, W_2, W_3). Each subject walked straight forward for 5 m, turned around and walked back to the starting point.
	(c) Stand-Sit- Lie (SSL)	Trial 9 (SSL calibration). The same as Trial 1 Trials 10–12 (SSL_1, SSL_2, SSL_3). Each subject performed the following activity: from standing position to sit on the edge of the mat (mat height was50 cm); then starting from the same sit position to lie down to the mat surface.
Fall Activities (FA)	(a) Right-sideway Fall (RF)	Trial 13 (fall calibration). The same as Trial 1. Trials 14–16 (RF_1, RF_2, RF_3). Each subject performed the following activity: starting from standing position, the subject performed a fall to subject's right-side down to the mat surface.
	(b) Forward Fall (FF)	Trials 17–19 (FF_1, FF_2, FF_3). Each subject performed the following activity: starting from standing position to fall down forward to the mat surface.
	(c) Backward Fall (BF)	Trials 20–22 (BF_1, BF_2, BF_3) Each subject performed the following activity: starting from standing position, the subject performed a backward fall down to the mat surface.