Prospective association between anxiety and/or depression symptoms at phase 1 (1985–1988) and physical activity practice at recommended levels at phase 2 (1989–1990) or 3 (1991–1993) among participants with physical activity level under the recommended levels at phase 1 (N = 5,385). Adjusted ORs were for sex, age, ethnicity, marital status, occupational grade, satisfaction with work, stressful life events score, smoking, alcohol intake and respiratory disease