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To visualize skin temperatures during the dynamic and static arm exercises, a monochromatic thermograph was used.The thermoviewer JTG system presented a 5-monochromatic step-thermal display in centaral temperatures of 34.5 or 34.0°C and a temperature range of 2°C. The temperature resolving power of the system was 0.2°C. A 35 mm camera was used to take a synchronous thermogram of 2 sec scanning time.The experiments were carried out in August in an experimental room with an air temperature of 27.3±0.6°C, and a relative humidity of 50.5±4.3%.The skin temperatures of the forearm, upper arm and chest for five male subjects (18-25 yr) were observed before, during and after 5 min exercise on an arm ergometer at work intensities of 0, 2, 3 and 4 kg (dynamic exercise : a rate of 40 contractions/min as timed with a metoronome) .The following results were obtained.1) Changes in skin temperatures were observed in detail and over a wide area during the dynamic and static exercises.2) The upper arm skin temperature increased as soon as that of the shoulder fell immediately after the beginning of dynamic exercise.3) The decrease in skin temperatures on the chest, shoulder and upper arm appeared with static exercise.4) The fall in skin temperature increased and spread from forearm toward chest with the incresse in static work intensity.
Kashimura et al. (Wed,) studied this question.