Table 1.

The PSI results of the first experiment. Data is represented as mean ± STD (unit is g, gravitation).

Body Movement	PSI of the Chest	PSI of the Upper Arm	p-Value	Average Ratio of Arm to Chest
AP (20°)	0.09 ± 0.06	0.10 ± 0.08	0.61	1.1
AP (40°)	0.17 ± 0.08	0.23 ± 0.10	<0.001 ***	1.4
AP (60°)	0.24 ± 0.07	0.38 ± 0.09	<0.001 ***	1.6
LR (20°)	0.06 ± 0.03	0.09 ± 0.05	<0.01 **	1.5
LR (40°)	0.14 ± 0.06	0.16 ± 0.07	<0.05 *	1.1
LR (60°)	0.20 ± 0.07	0.30 ± 0.11	<0.001 ***	1.5
HA	0.05 ± 0.03	0.23 ± 0.10	<0.001 ***	4.6
NS	0.01 ± 0.01	0.01 ± 0.01	<0.001 ***	1.0

* p < 0.05, ** p < 0.01, *** p < 0.001.