Accelerometer Derived Activity Counts and Oxygen Consumption between Young and Older Individuals

Table 3

Relative oxygen uptake (mL·kg·min⁻¹), heart rate, averaged activity counts, and measured MET values at rest and during treadmill walking in young (𝑛=16) and elderly subjects (𝑛=14).

		Rest	Treadmill speed (m·min^−1)
			27	54	80	94, 2% grade
Young	V̇O2	3.9±0.3	7.6±0.6^#	9.4±0.6^#	12.4±0.9^#	16.0±1.3^#
	HR	67.3±6.9	78.9±7.7^#	84.6±6.7^#	93.3±8.3^#	107.4±13.9^#
	MET		1.9±0.2^#	2.4±0.3^#	3.2±0.3^#	4.14±0.4^#
	AC		209±130^#	1188±444^#	2998±739^#	3689±803^#
Elderly	V̇O2	3.5±0.5^∗	8.6±1.4^∗#	11.0±1.7^∗#	14.7±2.0^∗#	18.5±2.2^∗#
	HR	69.8±9.8	86.7±10.9^∗#	93.8±10.5^∗#	109.2±15.4^∗#	119.9±14.6^∗#
	MET		2.5±0.4^∗#	3.3±0.6^∗#	4.3±0.7^∗#	5.5±0.9^#
	AC		412±352^#	1267±532^#	2805±891^#	3506±1032^#

V̇O₂: relative oxygen consumption (mL·kg·min⁻¹); HR: heart rate (bts·min⁻¹); AC: averaged activity counts (counts·min⁻¹).
*Significantly different from young group, 𝑃<0.05.
^#Significantly different among speeds, 𝑃<0.05.