Table 2.

Selected datasets and their main features.

Acronym	Dataset Name	Smartphone Position	Accelerometer Metricb	Sampling Rate	Number of Users/Activ
KH	KU-HAR23	waist bag	m/s2	100 Hz	90/18
MS	MotionSense24	pocket	G	50 Hz	24/6
RW	RealWorld3	thigh/waista	m/s2	50 Hz	15/8
UCI	UCI-HAR25	waist bag	G	50 Hz	30/5
WDM	WISDM2	pocket	m/s2	20 Hz	51/18

^aThis dataset employs multiple smartphones placed in different locations during data collection (e.g., thigh, waist, shin, head, etc.). We used data collected by sensors placed at thigh (RW-Thigh) and waist (RW-Waist), which should be equivalent to a pocket and a waist bag.

^bAll datasets record gyroscope samples in rad/s.