     Δ Change PA            0.000   0.000;0.000    **0.000**  PA, physical activity according to ACSM/AHA questionnaire; β, change in value; CI, confidence intervals; HRQOL SF-00, Health Related Quality of Life 00-Item Short Form Health Survey; Δ, the difference between 0-month value and start value.  ^a^Adjusted for PA level at baseline, age, sex, social situation, economy, education and smoking.  Statistical significance was set at *p*≤ 0.00.  