Is there a U-shaped relationship between physical activity in leisure time and risk of chronic low back pain? A follow-up in the HUNT Study

Table 1 Proportion of individuals with chronic LBP at end of follow-up, by baseline physical activity

Physical activity in leisure time (hours per week)		Women		Men
Light	Hard	Total	With chronic LBP at end of follow-up (%)	Total	With chronic LBP at end of follow-up (%)
<1	0	1526	331 (21.7)	1367	220 (16.1)
≥1	0	3629	735 (20.3)	1936	296 (15.3)
	<1^a	2100	419 (20.0)	2075	295 (14.2)
	1–2	1831	322 (17.6)	1924	221 (11.5)
	≥3	530	108 (20.4)	1150	157 (13.7)

ISSN: 1471-2458