This is a study of teaching swimming, by some materials, such as ‘a series of wheels for diving’, for 18 handicapped children (11 autistic and 7 mentally retarded boys). A purpose of this study is to clarify the relationship between the type of developing process of swimming skill and their physical and mental abilities. The results were as follows.
1. The process types in developing swimming skill were classified by 4 groups. (1) Group A boys feared water at first, but gradually showed persistency for learning to swim, and at last became accomplished swimmers. (2) Group B were able to learn to swim for some purpose, and also became accomplished swimmers. (3) Group C were able to swim, enjoyed playing in the water, but had no interest in swimming. (4) Group D children were fearful of the water, and could gain little skill.
2. By statistical analysis, the groups with high swimming skill level (A+B) differed significantly from those with low swimming skill (C+D), in the standard physical fitness as well as language and social skills by the Tsumori Developmental Schedule. In general, there were high correlations between language and physical strength/fitness.
Although the developmental process depends on the degree and type of handicap, there is great variation in individual development. So, it is necessary to study in detail the teaching process based upon the condition of the individual.

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The purpose of this study was to examine how the effect of variable practice had influence on motor performance in school children and college students, by using a grading task of a standing broad jump.
Subjects of the constant condition practiced a jump of the 2/6 maximum jumping distance 60 times in the acquisition phase. Subjects of the random condition practiced a jump of the 1/6, 2/6, and 4/6 maximum jumping distance 60 times in random order in the acquisition phase. In the transfer phase, on the other hand, subjects of both conditions practiced a jump of the 3/6 maximum jumping distance 10 times Samples were 60 females and 60 males consisting of 20 members of three age groups; 9 and 12 years old children and college students (ages 19-23). Each age group was divided into two condition groups.
Though the constant group outperformed the random group in the acquisition phase, the random group outperformed the constant group in the transfer phase. Children were more effective for performance than college students in the transfer phase. And female college students were more effective for performance than male college students in the transfer phase.

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The purpose of this study is to determine the peak age (peak height velocity age) and investigate growth distance curves and velocity curves evaluated by Wavelet Analysis whih we presented as an efficient procedure of analysis for this purpose. Ninety eight longitudinal data of height (age 6 to 17 years old) were obtained retrospectively from health examination records in 1983. When considering growth distance data of height as time series data, the relationship between growth distances (y) and time (ages, t), y=F (t) and the f(t){the first derivative of the F(t)} were interpolated by using Analysing Wavelet of Yves. Meyer from time series data {(ti, yi): i=1, 2, 3, …n}. Therefore, the growth distance curves evaluated by Analysing Wavelet ψ (t) were drawn from a numeric calculation by H-P UNIX Work station. As the result, the peak age was identified, and the objective measure of maturity rate in height growth was attempted to evaluate in accordance with PHV age. Further, the growth velocity curves as the first derivative of growth distance curves evaluated by Wavelet Interpolation showed that appearances of both mid-growth spurt and after-growth spurt were confirmed clearly. However, the phase of after-growth spurt has been a little discussed in many studies untill recent day, so, further investigations have to be done with regard to the phase of its appearance.

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The purpose of this study is to clarify the developmental phase of patellar reflex function. The reflex time is measured by electric counter which is linked with the electoroswitch hammer that hits the patellar ligament. The subjects are 1275 males and females aged 4 to 21 years.
The reflex time ranges from 72 to 169 milliseconds with the normal distribution curve. However, the knee stretch reflex function does not necessarily develop with age. This is probably because the patellar reflex function develops synchronously as the standing ability develops during infancy.

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