It is a well known fact that physical fitness is influenced by physical activity. The purpose of this study is to find the relationship of physical fitness to organized club training, obesity, leanness and a weekly physical education program. The subjects were women aged 18 and 19 years, and the total number of participants were 1064. The results showed that 49% of the subjects had not been engaged in any training, 25% have had snch experiences of 6 months up to 2 years, 20% of them, 2 up to 5 years and 6% of the total group had 5 years and over of organized club training. This last group was physically fit the most. There were significant differences between the group of 5 years and over of sports training and other three groups. But there was no significant difference in the level of fitness between the group of less than 2 years and group of non-training. The subjects whose Rohrer's indexes were above 160 and below 110 showed inferior in the physical fitness to the normal index group. The subjects had 90 minutes of physical education classes every week and the average heart rate during active 45-minutes among the selected subjects was formed to be 138±15 beats per minute. The classes were thus considered not to be strenuous. Then all the participants were divided into five groups according to their level of physical fitness. All subjects were tested in fitness in April and December. The tests showed there was a significant decline in the physically well conditioned students examined in April, but a significant increase in the physically poorly conditioned students. In conclusion, the average value of physical fitness of the 1064 participants seemed to have been lowered by the non-training group, the obese group, and the lean group. The weekly physical education classes were considered to have provided positive effect in physical fitness among the average and the poorly conditioned students.