填空题

At the age of 40s and 50s, people should emphasize a variety of activities for ______.

【参考答案】

cardio，weight training and flexibility

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填空题

If you can make readjustments in your fitness plan as you age, you can stay strong and flexible and ______.

填空题

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