Table 2.

Changes in ventilatory and cardiovascular variables from baseline during dynamic upright roll at 0.25 Hz and 0.5 Hz in the young and older subjects

Variable	0.25 Hz			0.5 Hz
	Young	Older	P value	Young	Older	P value
	(n = 14)	(n = 12)		(n = 14)	(n = 12)
▵Inspiratory time (ms)	−131 ± 44*	−28 ± 49	0.024	−289 ± 90*	−159 ± 66*	0.273
▵Expiratory time (ms)	−346 ± 58*	−48 ± 51	0.001	−504 ± 79*	−209 ± 78*	0.015
▵Ventilation (1 min−1)	0.5 ± 0.4	0.3 ± 0.4	0.633	1.4 ± 0.6*	0.7 ± 0.4*	0.353
▵Tidal volume (ml)	−36 ± 13*	−7 ± 22*	0.263	−38 ± 15*	−40 ± 28	0.981
▵HR (beats min−1)	−2 ± 1	−4 ± 1*	0.201	−1 ± 1	−3 ± 1*	0.157
▵MAP (mmHg)	−4 ± 2*	−3 ± 1*	0.566	−3 ± 1*	−4 ± 2*	0.452

Values are mean ±s.e.m.P value represents the interaction term from the ANOVA (age x intervention).

^*P < 0.05 for change from baseline.