Japanese Journal of Physical Fitness and Sports Medicine
Online ISSN : 1881-4751
Print ISSN : 0039-906X
ISSN-L : 0039-906X
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Volume 27, Issue 4
Displaying 1-4 of 4 articles from this issue
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  • MAXIMAL AEROBIC POWER AND HEART RATE DURING USUAL ACTIVITIES OF SEDENTARY WORKERS IN URBAN DISTRICTS
    MICHIKATSU KONNO, TOSHIKI CHIWATA, MAKOTO YASUNAGA
    1978 Volume 27 Issue 4 Pages 135-139
    Published: December 01, 1978
    Released on J-STAGE: December 10, 2010
    DOIhttps://doi.org/10.7600/jspfsm1949.27.135
    JOURNAL FREE ACCESS
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    Measurements of heart rates during usual activities, maximal aerobic power and skinfold thickness were carried out as a basic research for the comparative study of the optimal load for successful living in modern society or in future ages. 18 urban sedentary male workers who came to work by car and were 19-38 years of age were selected as subjects.
    The mean and S.D. of the maximal aerobic power was 35.8±5.2ml/kg/min, and those of 15 subjects (83%) were below 40ml/kg/min. The means of 12-hr heart rates during usual activities ranged within 71.5-95.0 beats/min. The mean and S.D. of the maximal heart rate during usual activities was 113±10 beats/min; 61±4% of their maximal heart rates during exhaustive exercises. Significant correlation was found between the maximal heart rate during usual activities and maximal aerobic power.
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  • MOVEMENT-ASSOCIATED CORTICAL POTENTIAL PRECEDING VOLUNTARY MOVEMENT
    YOSHIAKI NISHIHIRA, TATSUMORI FUJITA, HIDEO ARAKI
    1978 Volume 27 Issue 4 Pages 140-148
    Published: December 01, 1978
    Released on J-STAGE: December 10, 2010
    DOIhttps://doi.org/10.7600/jspfsm1949.27.140
    JOURNAL FREE ACCESS
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    The purpose of the present experiment is to identify, in detail, results of the preceding experiment of authors that the amplitude of N1 potential was dominant over motor cortex area contralateral to moving limb, with bipolar lead and is to investigate negative potential appearing the scalp preceding voluntary movement depends on a precaution stimulus or on readiness of movement execution only.
    In addition to, discussing' the difference of CNV (Contingent Negative Variation) and N1 potential is, also, the purpose of the present experiment.
    The present experiment gave the following results.
    1. The results obtained with monopolar lead were that the amplitude of N1 potential was maximal at lead placement Cz in all movement.
    2. The results obtained with bipolar lead were that the amplitude of N1 potential showed, relatively, lower tendency in the combination within central area and showed, relatively, higher tendency in the combination of other lead placement to central area.
    3. Judging from all the scalp, the amplitude of N1 potential showed high tendency at central area.
    4. In particular, clear difference was identified between the latency of CNV and that of N1 potential.
    5. As showing much the same amplitude except for lead placement Cz, CNV extended from central area over the scalp.
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  • THE EFFECT OF PHYSICAL TRAINING ON COLD TOLERANCE
    TSUTOMU ARAKI, YOSHIAKI TODA, YOSHIMITSU INOUE, AKIRA TSUJINO
    1978 Volume 27 Issue 4 Pages 149-156
    Published: December 01, 1978
    Released on J-STAGE: September 30, 2010
    DOIhttps://doi.org/10.7600/jspfsm1949.27.149
    JOURNAL FREE ACCESS
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    A study was performed to elucidate the effect of physical training on the cold tolerance in human beings. Physically well trained men (T group) and untrained ones (U group) were exposed to cold stress in summer and winter. Each subject was dressed in experimental clothes and exposed to 10°C DB for 60 minutes in both seasons. Moreover, he was exposed in the semi-nude to 20°C DB in summer and to 17°C DB in winter for 60 minutes. During the period of exposure to cold, rectal and mean skin temperatures and respiratory metabolic rate were measured. To confirm the training effect further, the untrained men were asked to follow an experimental training program of daily routine which consisted of about 7 km outdoor running for 40 consecutive days in July and August. Before and after the training, they were exposed to the same cold stress as in the aforementioned summer experiments and subjected to the same measurement. Resting metabolic rate was higher in the T group than in the U group. Although no significant group differences were shown in the metabolic rate during the period of exposure to cold, the rate of increase from the resting value was lower in the T group than in the U group. There were no group differences in rectal or mean skin temperature during this period. When the untrained men were subjected continually to physical training, the resting metabolic rate was higher and the rate of increase from the resting value during the period of exposure to cold lower after the training than before. It was concluded that physical training could be a means to increase the cold tolerance.
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  • [title in Japanese]
    1978 Volume 27 Issue 4 Pages 167-259
    Published: December 01, 1978
    Released on J-STAGE: September 30, 2010
    DOIhttps://doi.org/10.7600/jspfsm1949.27.167
    JOURNAL FREE ACCESS
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