Paragraph ThreeResearchers tested obese men before and after they joined a one-year modest walking plan. The result: Their blood pressure improved and the amount of body fat around their abdomen — the dangerous kind of fat that leads to higher rates of heart disease and diabetes — significantly decreased.The amazing e_____ of modest walking on health.
【正确答案】：effect
【题目解析】：effect：影响、效果、作用。本段讲的是散步的作用。