Associations between Tactile Sensory Threshold and Postural Performance and Effects of Healthy Aging and Subthreshold Vibrotactile Stimulation on Postural Outcomes in a Simple Dual Task

Table 2

Means and standard deviations of postural performance, control, and cognitive response time of younger adults (YA) and older adults (OA) with and without vibration.

	ITTB		APPlength (in cm)		MLPlength (in cm)		COP (in cm)		COP (in cm)
	YA	OA	YA	OA	YA	OA	YA	OA	YA	OA
No vibration	1.4 ± 1.8	2.6 ± 4.2	10.2 ± 2.8	17 ± 7.9	4.1 ± 1.6	6.2 ± 2.1	4.7 ± 1.4	7.1 ± 1.0	3.3 ± 1.2	5.2 ± 1.3
Vibration	1.6 ± 3.1	2.4 ± 3.6	10.3 ± 3.9	16.9 ± 6.8	4.27 ± 2.3	1.6 ± 3.1	4.7 ± 1.3	6.8 ± 1.1	3.4 ± 1.0	5.0 ± 1.1
	RMSAP (in cm)		Strategy score		ES		ApEn		Response time
	YA	OA	YA	OA	YA	OA	YA	OA	YA	OA
No vibration	.42 ± .2	.58 ± .1	98.5 ± .7	98.0 ± 1.0	92.0 ± 5.8	92.0 ± 2.3	0.62 ± .1	0.68 ± .2	1.7 ± .1	2.1 ± .3
Vibration	.41 ± .2	.59 ± .2	98.5 ± .7	98.0 ± 1.1	93.0 ± 3.0	92.6 ± 1.4	0.62 ± .1	0.69 ± .1	1.8 ± .1	2.2 ± .3