Intragastric pressure at gastric empty state was measured by radio capsule method during various exercises in three human subjects. The E. I. L. Type. 70. pressure sensitive radio capsule of England make was used in this experiment.
1) The empty intragastric pressure at rest was 30.0-33.0 cmH₂O and the gastric peristalsis was 2-3 sec. in frequency and less than 3 cmH₂O in amplitude.
2) The resting gastric peristalsis was disappeared immediately after the onset of deep respiration or exercise. The pressure raised to maximum 76.0 cmH₂O at the end of deep abdominal inspiration.
3) The intragastric temperature raised during various exercises and increasing grade was showed in Table of the text.

Heart rate and R-R intervals of ECG during sleep were examined in healthy young men. Heart rate per minute were gradually decreased when the subject fell asleep. Whole through one night sleep data there were two typical heart rate variation patterns, namely stable stage and fluctuating stage. Sleep stages determined by EEG, EOG and EMG of chin corresponded with these two patterns; slow wave stage (Stage III/IV) showed the stable pattern, REM Stage and Stage I showed the fluctuating pattern, Stage II both patterns. The fluctuating pattern showed higher heart rate level.
Further studies computed R-R intervals and its variations of ECG revealed 4 typical patterns on the variations, and well corresponded with sleep patterns determined by the above methods. R-R interval varied from 1.39 to 0.67 sec during sleep. R-R interval variation befor onset of sleep showed lightly rythmical periodicity (20-40 sec) and small fluctuation (0.1 sec) (awaking pattern) . R-R intervals after onset of sleep extended gradually, fluctuating midly (0.1 sec) and did not show any periodicity (transient pattern) . R-R interval reached its maximum level then. At slow wave stage (S-III/IV) R-R interval showed mild fluctuation as the transient strage, and did not show any periodicity (stable pattern) . At REM stage and S-I it showed large fluctuation (more than 0.2 sec) and significant periodicity (10-30 sec) . At S-2 if the stage was in the course of deepening the sleep, it showed stable pattern and if it was in the course of lightening the sleep it showed fluctuating pattern.

1) Tension development during rapidly grip strength exertion of athletes and nonathletes was by Natori's method analyzed.
2) Subjects of athletes were 71 healthy men of 17-26 ages and of non-athletes were 54 healthy men of 17-30 ages. Athletes were 26 high school students of 17-19 ages, 22 physical education college students of 19-21 ages and 23 general adult men of 20-26 ages. High school students were 3 Sumo-men, 4 Judo-men, 6 Kendo-men and 13 Baseball-men. Physical education college students were 6 Handball-men, 9 Rugby-men and 7 Gymnasticsmen. General adult men were 11 Judo-men and 12 Kendo-men. Non athletes were 20 high school students of 17-18 ages, 6 university students of 19-21 ages and 28 general adult men of 21-30 ages.
3) Isometric grip strength manometer were used a new device, to improvement on Smedley's manometer straingauge added.
Tension development were amplifired and recorded by portable Visigraph (Sanei-Sokki Ltd.) with paper-speed of 10cm/sec.
4) In the each case was 3 portions of a whole curve of time course of tension and Pmax.P₁, P₂; log t₁, log t₂; tan θ, tan ψ estimated according Natori's method.
5) Except general adults of 26-30 ages of non-athletes were Pmax. of athletes greater than non-athletes.
Pmax, of a Judo-man of general adult was greatest 68.5kg, and Pmax. of a high school student of 17 age of non-athlete smallest 35.8kg.
6) Tan θ and tan ψ of athletes were greater than non-athletes.
Tan θ of a Sumo-man of high school student was greatest 0.3628 and tan θ of a Judoman of general adult was greater 0.3500, but tan θ of a high school student of non-athletes was smallest 0.1624.
Tan ψ of a Kendo-man of general adult was greatest 1.6308 and tan ψ of a Sumoman of high school student was greater 1.5769, but tan ψ of a high school student of non-athlete was smallest 0.5278.
7) Muscle strength of non-athletes may well increased to be about 25 age, so that Pmax. of general adults of non-athletes were greater and of high school students of nonathletes smaller.
But athletes exercised usually for athletic sports, so that Pmax, and tan θ, tan ψ independent of age was greater than non-athletes, these were an each event varied. Pmax. of Judo-men of general adults were relative greater and tan θ, tan ψ were greatest. Pmax. of Handboll-men were greatest but tan θ, tan ψ were relative smaller. Pmax. of Gymnas-tics-men were relative greater but tan θ, tan ψ were smallest. So that were varied pattern of time course of tension development of hand grip exertion an each event of athletics.