Overweight and obesity are associated with increased risk for certain cancers. Overweight and obesity are increasing in countries at all income levels. Emerging evidence also indicates that being overweight is associated with increased risk of cancer recurrence and decreased cancer survival.
Physical activity alone (regardless of body weight, diet, and other factors) is associated with reduced risk of certain cancers. Because physical activity helps prevent excess body weight, it also contributes to reduced risk of cancers associated with overweight and obesity. Thirty-one percent of adults worldwide do not meet the World Health Organization recommendation of 150 minutes of moderate physical activity or the equivalent each week.
While personal lifestyle choices can reduce the risk of cancer, governments and civil society also have a responsibility to develop food and economic policies conducive to health, create environments that support physical activity, and develop interventions targeting children and youth.