Table 1 Kinematic parameters calculated

Assessment of postural control

Medial-lateral displacement

(MLDisp)

Medial-lateral excursion of the COM during the 30 s bipedal phase.

90th percentile of the double integration of the acc signal [63] and an inverted pendulum model [60]

mm

Anterior-posterior displacement

(APDisp)

Anterior-posterior excursion of the COM during the 30 s bipedal phase.

mm

Assessment of gait

Cranio-caudal range

(CCrange)

Vertical COM movement, taking the average of walking forth (t1,t2)* and back (t7,t8)* over the 3-meter distance.

90th percentile of the double integration of the acc signal [64]

mm

Medial-lateral range

(MLrange)

Horizontal COM movement, taking the average of walking forth (t1,t2)* and back (t7,t8)* over the 3-meter distance.

mm

Assessment of turn-to-sit-to-stand

Turn-to-sit power

(PturnSit)

Mean power generated when turning around and sitting on the chair (t3,t4)*.

Estimated by the trajectory of the COM during movement, participant’s weight and height, and the time taken for stand-to-sit and sit-to-stand [66].

Watts

Sit-to-stand power

(Pstand)

Mean power generated by getting up from the chair (t5,t6)*.

Watts

Turn-to-sit jerk

(RangeJerkSit)

Range of over acceleration when turning around and sitting on the chair (t3,t4)*.

Obtained by subtracting the maximum minus the minimum of the Jerk during the gesture.

m/s³

Sit-to-stand jerk

(RangeJerkStand)

Range of over acceleration when getting up from the chair (t5,t6)*.

m/s³

Assessment of time

Total execution time

Time needed to complete all the phases of the test.

Sum of the split of walking (t1,t2 and t7,t8)* and sit (t3,t4)* to stand times (t5,t6)*.

seconds

Reaction time

Time elapsed from the acoustic signal to gait initiation (t0,t1)*.

seconds