Unit 126：Make age no barrier第126单元：年龄不是障碍Sharon Lear learned to downhill ski,a sport which had previously terrified her,in Colorado at the age of 38.科罗拉多州的雪伦·李尔在她三十八岁时学会了先前令她恐惧的下坡滑雪。Deborah Martin of San Diego,going on 60,spends her summer vacations riding her bicycle up and down the steep slopes of the Colorado Rockies.圣地亚哥年近六十的黛伯拉.马汀则利用暑假到科罗拉多州境内的落基山脉里陡峭的斜坡上骑越野脚踏车。And then there's Manny Wein,now in his 90s,who has been running the 26-mile Los Angeles Marathon for the past five years.接着是九十多岁的曼尼·韦恩在过去五年来都参加了长达二十六英里的洛杉矶马拉松赛，The rest of the time,he lifts weights,swims or dances.其余的时间他则用来举重、游泳和跳舞。Contrary to old-fangled notions,your level of fitness can continue to grow throughout your lifetime.和一些老旧的观念不同的是，你的体能状况在一生中可以持续地成长。One weight-training program for men in their 60s and 70s showed that they were able to increase their muscle size by an average of 11 percent and their strength by 170 percent-after just 12 weeks.一项针对六十余岁及七十余岁的人所做的重量训练计划显示，在仅仅十二周后，这些人平均在肌肉的尺寸上增加了百分之十一，而在力道上则增加了百分之一百七。