[填空题]In their 20s and 30s, men should consider getting involved in various sports for body flexibility.

[填空题]In their 20s and 30s, men should consider getting involved in various sports for body flexibility.

[填空题]Reaching old age, men should try hard to maintain good bone density so as not to suffer ______.

[填空题]At the peak of their strength, men in their 20s sometimes also need to take up cardiovascular programs which can maintain their heart and lung health.

[单项选择]
Men who exercise often are less likely to die from cancer than those who (51) , new research published in the British Journal of Cancer revealed yesterday.
A team of scientists from the Karolinska Institute in Sweden looked (52) the effect of physical activity and cancer risk in 40,708 men (53) between 45 and 79.
The seven-year study found that men (54) walked or cycled for at least 80 minutes a day had a 84 percent lower risk of (55) from cancer than the men who did less exercise or nothing at all. (56) the period studied, 3,714 men developed cancer and 1,153 died from the disease. The researchers suggest that half an hour’s walking (57) cycling a day increased survival among these men by 33 percent.
The researchers surveyed men from two counties in central Sweden about their lifestyle and the amount of (58) activity t
A. on
B. for
C. at
D. by