Reported frequency of physical activity in a large epidemiological study: relationship to specific activities and repeatability over time

Table 2 Various reported physical activities at follow-up in relation to frequency of activity at baseline

	Hours and excess MET-hours ^a per week spent doing various activities reported ~3 years after baseline
	walking		cycling		gardening		housework
	hours mean	MET-hours mean (SD)	hours mean	MET-hours mean (SD)	hours mean	MET-hours mean (SD)	hours mean	MET-hours mean (SD)
Baseline reported frequency of strenuous physical activity		n = 589,632		n = 589,632		n = 589,632		n = 589,632
Never	3.9	9.7 (12.8)	0.1	0.9 (5.7)	2.4	7.3 (9.9)	14.4	28.8 (23.0)
< Once per week	4.4	11.1 (12.1)	0.2	1.5 (6.8)	3.1	9.4 (10.8)	13.8	27.5 (21.2)
Once per week	4.8	12.0 (12.4)	0.3	1.9 (7.7)	3.3	9.8 (11.0)	13.5	27.0 (21.1)
2 to 3 times per week	5.2	13.1 (13.2)	0.4	2.8 (9.8)	3.5	10.5 (12.1)	13.3	26.6 (21.0)
4 to 6 times per week	5.9	14.8 (14.9)	0.6	4.4 (13.1)	3.8	11.4 (13.9)	13.4	26.7 (21.6)
Daily	7.5	18.6 (20.4)	0.6	4.4 (16.5)	4.1	12.3 (15.7)	15.4	30.9 (25.7)
Correlation coefficient		0.18		0.15		0.15		-0.03
P for trend		< 0.0001		< 0.0001		< 0.0001		< 0.0001
Baseline reported frequency of any physical activity		n = 589,896		n = 589,896		n = 589,896		n = 589,896
Never	3.2	7.9 (12.7)	0.1	0.6 (4.9)	2.2	6.7 (9.8)	14.7	29.3 (23.7)
< Once per week	3.3	8.2 (11.2)	0.1	0.9 (4.7)	2.6	7.9 (9.8)	13.7	27.3 (21.8)
Once per week	3.7	9.2 (11.3)	0.2	1.3 (6.1)	2.8	8.4 (10.0)	13.5	27.0 (21.6)
2 to 3 times per week	4.4	11.0 (11.5)	0.3	1.8 (7.6)	3.0	9.1 (10.6)	13.4	26.8 (20.8)
4 to 6 times per week	5.2	13.0 (12.1)	0.4	2.7 (9.1)	3.2	9.6 (11.2)	13.5	27.0 (20.5)
Daily	6.5	16.3 (15.9)	0.4	2.6 (10.9)	3.6	10.8 (13.0)	14.8	29.6 (23.3)
Correlation coefficient		0.31		0.11		0.14		0.01
P for trend		< 0.0001		< 0.0001		< 0.0001		0.002

^a Excess MET-hours: metabolic equivalent hours of energy expenditure in excess of basal metabolic rate; see Methods for details.

ISSN: 1471-2288