- Quitting smoking
- Becoming more physically active
- Losing weight
- Eating less fat
According to the International Journal of Epidemiology, the answer is more physical activity.
The Department of Welfare and Social Statistics in Stockholm, Sweden, studied 3,843 adults, first in 1980 and 1981. Then researchers went back to those same people between 1988 and 1989 to interview as many of them as could be found.
After looking at health factors like obesity, smoking, hypertension and sedentary behavior -- all of which could be harmful -- the researchers concluded that an inactive lifestyle is the single greatest risk to our health.