Fig. 3
From: A Full-Body IMU-Based Motion Dataset of Daily Tasks by Older and Younger Adults

(a) Schematic images showing one movement repetition of the task (r01) of placing a towel on a hook and retrieving it. (b) The movement consists of two actions—placing and retrieving—and incorporates (c) motion in two directions, i.e., either forward to reach towards the target or in reversal to return to the neutral pose (see also color-coded arrows in (a) indicating motion direction). (d) Moreover, each action contains a phase where the object is transferred, either during forward motion until the target (hook) is reached for hanging the object, or during the reversal motion after the hook was reached to retrieve the object. (e) For data analysis, the time frames t1 − t5 are detected that divide the recorded data into motion segments (i.e., the placing action into segments s1 and s2, and the retrieving action into segments s3 and s4). Such movement segments allow for an analysis of the motion execution in relation to the motion direction and object involvement.