Table 4.

Oxygen consumption of walking and sitting behaviors during sitting bouts with and without a walking break (mean ± SE).

	Bout 1	Bout 2	Bout 3	Bout 4
Total Gross O2 consumption	ml/kg/30 min	ml/kg/30 min	ml/kg/30 min	ml/kg/30 min
All	113.4 ± 4.0 b, c, d	122.4 ± 3. 9 a, c, d	132.9 ± 3.3 a, b, d	156.2 ± 3.8 a, b, c
Females	112.2 ± 5.3 b, c, d	124.7 ± 5.8 a, d	130.8 ± 5.0 a, d	155.9 ± 5.9 a, b, c
Males	114.5 ± 6.1 b, c, d	120.1 ± 5.2 a, c, d	135.0 ± 4.5 a, b, d	156.4 ± 4.7 a, b, c
Total Net O2 consumption	ml/kg/30 min	ml/kg/30 min	ml/kg/30 min	ml/kg/30 min
All	19. 8 ± 3.4 b, c, d	28.8 ± 3.3 a, c, d	39.3 ± 2.9 a, b, d	62.6 ± 2.9 a, b, c
Females	22.5 ± 4.9 b, c, d	35.0 ± 4.6 a, c, d	41.1 ± 4.0 a, b, d	66.2 ± 4.1 a, b, c
Males	17.0 ± 4.9 b, c, d	22.6 ± 4.6 a, c, d	37.5 ± 4.0 a, b, d	58.9 ± 4.1 a, b, c
Net Sitting O2 consumption	ml/kg/30 min	ml/kg/29 min	ml/kg/28 min	ml/kg/25 min
All	19. 8 ± 3.4 b, c	23.8 ± 3.1a	25.4 ± 2.5a	23.9 ± 2.0
Females	22.5 ± 4.9 b	29.7 ± 4.4a	25.7 ± 3.6	26.8 ± 2.6
Males	17.0 ± 4.9 c	17.9 ± 4.4	25.1 ± 3.6a, b	21.0 ± 6.7
Net PA O2 consumption		ml/kg/min	ml/kg/2 min	ml/kg/5 min
All	--	5.0 ± 0.3 c, d	12.7 ± 0.4 b, d	38.7 ± 1.5 b, c
Females	--	5.4 ± 0.4 c, d	13.0 ± 0.6 b, d	39. 4 ± 2.1 b, c
Males	--	4.6 ± 0.4 c, d	12.4 ± 0.6 b, d	38.0 ± 2.1 b, c

^a significantly different than bout 1 (p < .05).

^b significantly different tan bout 2 (p < .05).

^c significantly different than bout 3 (p < .05).

^d significantly different than bout 4 (p < .05).

Note. Bout 1 consisted of 30 consecutive minutes of sitting. Bout 2 consisted of 14 minutes of sitting, 1 minute of walking, and 15 minutes of sitting. Bout 3 consisted of 13 minutes of sitting, 2 minutes of walking, and 15 minutes of sitting. Bout 4 consisted of 13 minutes of sitting, 5 minutes of walking, and 12 minutes of sitting.