It is often said the recent trend in work pattern and life-style has resulted in physical inactivity for industrial workers, leading to an increase in the risk of cardiovascular diseases. A study was conducted to evaluate benefits of a corporate health and fitness program on employees' health. The present report describes benefits of long-term corporate fitness program on employees' health with the results of health examinations, consisting of health checkup and physical fitness test for male employees over 35 years old. From the study, the following results were obtained;1) The rate of workers with obesity, hypertriglyceridemia and hyperuricemia increased, especially among younger workers, during these ten years.2) It was revealed, however, that the rate of workers with hypercholesterolemia and abnormal liver function decreased among middle-aged workers.3) A decrease was witnessed in the number of hypertensive workers. And the level of physical fitness of examiners improved during these ten years.4) Despite the higher average age of employees, the rate of sick leave decreased. The above results show that the corporate fitness program have proven effective in improving employees' health and in having preventive effects against cardiovascular diseases.

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The impact phenomena of a tennis ball on a rigid surface are experimentally investigated by high-speed video camera. It is found that the maximum values of deformations of a ball increase with the incident velocity of a ball, while the collision time and the values of the restitution coefficient decrease with the incident velocity.
The dynamical model including both elastic and damping properties is proposed to explain our experimental results. We have found that our model can well reproduce the experimental values of the restitution coefficient, the collision time and the time history of the deformations.
We also investigate theoretically the rebound velocity,the collision time and the displacement of a ball when it collides with a accelerated rigid surface.

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To study the effects of kendo uniform and protectors on body temperatures during exercise in a hot environment, we compared three trials ; the exercise with shorts at a dry bulb temperature of 25.4(SD ; 0.5)°C and a wet bulb temperature of 21.2(1.8)°C, the exercise with shorts at a dry bulb temperature of 30.5(0.4)°C and a wet bulb temperature of 23.6(1.3)°C, and the exercise with kendo uniform and protectors at a dry bulb temperature of 30.5(0.5)°C and a wet bulb temperature of 24.2(1.4)°C. Four male college kendo fencers performed 30min bicycle exercise at the intensity of 90% of ventilation threshold (135±23watt). There were no significant differences in the rates of change in heart rate, blood pressure, body weight, hematocrit, serum total protein concentration, serum osmolarity, and plasma concentrations of catecholamine and vasopressin among the three trials. In the trial with kendo uniform and protectors, however, tympatic temperature and skin temperatures during exercise were significantly higher than those in the other trials. We conclude that the exercise with kendo uniform and protectors in a hot environment may result in the marked increases in body temperatures, even though the exercise would be mild, and the degrees of circulatory responses and dehydration would not be affected by the wear during the exercise.

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The brain injury during a sports activity are caused by the percussion which involves collision to the head. To construct a protective environment for such collisions are one of the most important factors for the biomechanical problems. In this investigation, we will experiment the collision of a human head of the testee by using Judo Tatami mats within the safety limits. We propose the mathematical model which can computer simulate the experiment model which will make the reappearance of the head collision phenomenon, and also the head collision phenomenon itself by using the measurements of the impact force and the acceleration from the experiment.

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The "Japan Society of Sports Industry" was founded in order to develop the " Marriage" of sport and industry also by the help of science. Since according to a pragmatic point of view science can be linked to every aspect of reality it is consequent to speak of sport industry science. Therefore it is the purpose of this analysis (1) to explain the importance of this relatively new aspect of sport science. (2) It has to be defined where the position of sport industry science within sport science is and (3) how sport industry science can be structured. An answer to these three purposes will consititute a theoretical framework needed for this new dimension of sport science. It is the responsibility of sport science to deal with new and actual aspects like the combination, relation and cooperation of industry and sport. The scientific dimension has to look for a proper development in this regard. This is a pragmatic and realistic point of view and perception of science in general and sport science in specific. Very often this understanding is lacking. Positively seen it is the purpose of this analysis to realise in the case of sport industry science the slogan "practice guided theory and theory guided practice". The following analysis therefore tries to define the position of sport industry science within sport science. This is done in three parts. Firstly some basic issues like purpose of the analysis, terminology and aims/objectives of sport science are discussed. Secondly the body of knowledge of sport science and the research methodology for sport science are analysed in order to serve as explanation for sport industry science. Thirdly the position of sport industry science in explained by developing a theoretical framework for this scientific aspect. Consequently it is hoped that this theoretical framework can help to clarify andenhance the task and work of the "Japan Society of Sports Industry".

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