An investigation of the realities of hiding obesity on young females and consideration of the effective exercise programs to improve their body composition and physical functions

在过去的几年里，许多年轻女性更喜欢苗条的身体，经常尝试减肥，而没有身体活动。作为一个结果，他们的身体质量指数（BMI）是平均的或低的，但他们的身体脂肪百分比更高。他们称之为“隐藏肥胖”。本研究的第一个目的是找出许多年轻女性身体状况差的原因。第二，对年轻女性身体组成和身体功能的影响是长期研究的。284名年轻女性（18- 22岁），1997年至1999年3年期间，我们学院所有新注册的学生都对身体、身体组成、异常功率（腿延伸功率）和飞行功率（PWC D275%Hrmax YD 2）进行了测量。身体成分是根据空气置换法估计的。结果显示，学生需要在身体成分中进行身体成分的改进，占全部和大多数的30%，他们隐藏肥胖。大约40%的人都有较低的腿能力。%脂肪和腿力量之间的负关系被识别。由于每周有一年的一半的练习班，这意味着腿力量的价值增加了显著。学生们一直在每周参加练习课程，参加额外的半年课程，展示了更多的高级有氧运动和有氧运动能力。然而，身体组成并没有得到改善。在那之后，参与是一个习惯性组合的训练方案，使有氧运动和力量训练（1-2次/周x12周）不仅因身体成分和血清成分而导致的显著改善。航空锻炼计划和组合锻炼计划（航空锻炼加强度训练）之间的差异是不清楚的。

In recent years, many numbers of young females prefer a slim body and often try weight loss by low calorie diets without physical activities. As a result, their body mass indexes (BMI) are average or low level but they have a rather high percent of body fat. They are called 'hiding obesity'. The first purpose of this study was to find out how many young females have poor body composition. Secondly, the effects of habitual exercise on young females' body composition and physical functions were investigated longitudinally. 284 young females (18-22yrs), all newly enrolled students at our college during the 3 years from 1997 to 1999 were measured for physique, body composition, anaerobic power (leg extension power) and aerobic power (PWCィイD275%HrmaxィエD2). Body composition was estimated by air displacement method. The results showed that the students requiring improvement in body composition amounted to 30% of all and most of them were hiding obesity. About 40% of all subjects had inferior leg power. The negative relationship between %fat and leg power was recognized.By having a weekly exercise class for half of one year, the mean value of their leg power increased significantly. The students who continually participated in a weekly exercise class for an additional half year showed more superior anaerobic and aerobic power. However, body composition did not improved. After that, the participation in a habitual combined training program consisting of aerobic exercise and stength training (1-2 times/week×12 weeks) caused significant improvements in not only physical strength but in body composition and serum components. The differences of the training effects between aerobic exercise program and combined exercise program (aerobic exercises plus strength training) were not clearly found.