Unit 3 A healthy life Nearly a million American youngsters， some as young as 6，rely onpersonal trainers to shape up塑身， lose weightor improve in sports. Many parents， worried about their children'sweight and fitness， say that working with a trainer motivates 激发 their kids and helps them build confidence. So they arewilling to spend the D|S40 to D|S60 an hour that trainers generally charge.,The Bostonbased group's latest figures， from 2005， show that 824，000 children between the ages of 6 and 17 use trainers.With many high school students not getting exercise at school， more parents are turning totrainers to help their children stay fit. More than onethird of American children are overweight andexperts warn of future health problems ahead from diabetes 糖尿病 to heart disease.,Kathleen Ballew said that her 7yearold son， Jordan Sims， who would begin second grade in the fall， couldbenefit from some oneonone time with a fitness professional. She had noticed that he needed help with balance and coordination 协调能力 in soccer and karate 空手道. She also observed that he did not want to do things that kids normally did， like climbing on park equipment. After Jordan had begun working out at Baylor Tom Landry Fitness Center in Dallas with a trainer about a year before， he moved more naturally and confidently. His trainer， Lauren Jacobson， works with about half a dozen kids under 18. She said she noticed that training helped build confidence and a senseof accomplishment， along withhelping kids get in better shape.1Section_ⅠWarming Up & Reading — Prereading ,ADVICE FROM GRANDADDear James，It is a beautiful day here and I am sitting under the big tree at the end o...
