Directions: In this section of the test, there are ten paragraphs. Each of the paragraphs is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Spell out the missing letters of the word on your Answer Sheet.
Researchers 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.
38. The amazing e______ of modest walking on health.
【正确答案】：effect
