RESEARCH ON PHYSICAL FITNESS LEVEL NECESSARY FOR INDFEPENDENT LIFE IN ELDERLY PEOPLE

本研究的目的是描述日常生活中的能量消耗，腿部伸肌力量和乳酸阈值（LT）之间的关系，以明确老年人独立生活所需的体能水平。本研究对象为25名健康、独立生活的志愿者（男性6名，女性19名）。他们的平均年龄为67岁（范围从60岁到79岁）。(1)日常体力活动水平与身体素质的关系老年人日常生活活动水平较低，日常生活步行多为间歇性。每日能量消耗与LT和腿伸肌功率呈正相关。得出的结论是，老年人谁保持身体活跃的生活方式不经历老年人的有氧工作能力和肌肉功能（腿部伸肌力量）的下降。(2)日常体力活动对身体素质的影响我们检查了led伸肌功率，LT和计步器得分（步数）的变化，以确定身体素质的变化，这些变化受到年龄或日常体力活动引起的生理功能变化的影响。对健康老年人分别于术后1 ~ 2年进行下肢伸肌力、LT及计步器评分。下肢伸肌力量和LT无明显变化，但步数的减少与LT呈正相关。提示75岁以下老年人的体质与体力活动水平的相关性大于与年龄的相关性。

The purpose of this study was to describe the relationships among energy expenditure in daily living, leg extensor power, and lactate threshold (LT) to clear the physical fitness level necessary for independent life in older people. The subjects of this study were 25 volunteers (6 maled and 19 females).healthy and living independently. Their mean age was 67 years (range from 60 to 79 years).(1) Relationship between daily physical activity level and physical fitnessIt is proved that the activity level of dily living in elderly people is low and most of walking of dily living are intermittent. Daily energy expenditure correlated positively with LT and leg extensor power. It is concluded that elderly people who maintain a physically active life-style do not experience the decline in aerobic work capacity and muscle function (leg extensor power) in elderly people.(2) Effect of daily physical activity on physical fitnessWe examined the change of led extensor power, LT and pedometer score (number of steps) to ascertain the change of physical fitness which are influenced by a change of physiological function by ageing or daily physical activity. Leg extansor power, LT and pedometer score were measured in healthy elderly proples after one or two years. There were no significant change of leg extensor power and LT.But the decrease in number of steps correlated positively with LT.It was suggested that physical fitness is tends to be more related to physical activity level than to aging on elderly people below 75 years of age.