|Takafumi Maeda||Last modified date：2019.06.10|
Professor / Physiological Anthropology / Department of Human Science / Faculty of Design
|Takafumi Maeda||Last modified date：2019.06.10|
|1.||Toshihiro Otsuka, Masaru Itoyama, Masato Yano, Takafumi Maeda, The effects of indoor carbon dioxide concentrations on arousal level and task performance, 15th Conference of the International Society of Indoor Air Quality & Climate, Indoor Air 2018, 2018.07.|
|2.||Takafumi Maeda, Shota Tsuruzono, Etika Vidyarini, Effects of Pre-Cooling on Physiological Responses and Mental Task Performance in a Hot Environment, International Conference of Occupational Health and Safety 2019, 2019.04.|
|3.||Kentaro Matsumoto, Yusuke Kobori, Hitoshi Wakabayashi, Mami Matsushita, Toshimitsu Kameya, Takafumi Maeda, Masayuki Saito, Study on multiple organs coordination for non-shivering thermogenesis and vasomotor control in mild cold environment in human, 7th International Conference on the Physiology and Pharmacology of Temperature Regulation, 2018.10.|
|4.||Etika VIDYARINI, Shota TSURUZONO,Takafumi MAEDA, Comparison of Physiological Responses and Mental Task Performance between Indonesian and Japanese in Air Temperature Step Changes, 日本生理人類学会第78回大会, 2018.10.|
|5.||Etika Vidyarini, Shota Tsuruzono, Takafumi Maeda, Effect of temperature step changes on physiological responses and mental task performance in Indonesian subjects, 日本生理人類学会第77回大会, 2018.06.|
|6.||Linran Ruan, Nobuko Hashiguchi, Masanobu Hayashi, Hiroko Koga, Takashi Nonaka, Takafumi Maeda, Effects of bathing on psychophysiological responses in the elderly and the young males, The 17th International Conference on Environmental Ergonomics, 2017.11, To many Japanese, taking a hot bath is an essential part of their daily life. However, there have been hot bath-related illness and deaths among the elderly populations, especially during winter. The purpose of this study was to clarify the variation in physiological and psychological responses of the elderly and the young males during and after taking a hot bath. Ten healthy old men (70.2±4.1 years old) and ten healthy young men (22.6±0.84 years old) participated in this experiment. They stayed in a sitting posture with sweat pants and bathrobe in the pre-room (air temperature:20°C relative humidity:50%) for 60 min. And then they took off the clothes and moved to the bathroom, subsequently stayed in the bathtub for 8 minutes. The water temperature was set at 40°C and 42°C on separate days for each participant. We measured blood pressure, heart rate, skin and rectal temperature, thermal sensation, and thermal comfort periodically before, during and after bathing. Systolic blood pressure(SBP) of the elderly significantly increased just after getting into hot water and significantly decreased during bathing. However, SBP of the young did not change. In addition, SBP of the elderly decreased further in the standing position soon after getting out of the bathtub but immediately increased by changing into sitting posture. Besides, heart rates (HR) of the elderly were not changed by bathing, but that of the young were significantly increased during bathing at 42°C. HR were increased by standing and decreased by sitting in both age groups, and the change in HR of the young was wider than the elderly. The results suggested that the weakened cardiovascular functions such as heart pump ability, blood vessel flexibility, and baroreflex sensitivity of the elderly might induce the large change in blood pressure and small change in heart rate, resulting in higher risk of accidents for the
elderly to take a hot bath during winter..
|7.||Takafumi Maeda, Relationship between endothelium-dependent vasodilation and cold-induced vasodilation, The 17th International Conference on Environmental Ergonomics, 2017.11.|
|8.||Etika Vidyarini, Takafumi Maeda, Effect of transient changes of air temperature on subjective response of office worker in tropical country. Case study: Jakarta, Indonesia., International Conference of Occupational Health and Safety 2017 "Occupational Health and Safety Trends and Challenges in Developing Countries", 2017.11.|
|9.||Takafumi Maeda, Ryo Takahashi, Effects of indoor air temperature and local thermal stimuli on mental task performance., International Conference of Occupational Health and Safety 2017 "Occupational Health and Safety Trends and Challenges in Developing Countries", 2017.11, Individual heating and cooling system are required at office where many various persons are staying to their work, because there are large individual differences in the comfortable range of air temperature. Local heating and cooling by contact are used for individual air conditioning in offices and heating and cooling of electric vehicles. Although it was reported the effect of local heating/cooling by contact on thermoregulation and subjective votes, it is unknown the effect of local heating/cooling by contact on mental work performance. The purposes of the present study were to clarify the effects of indoor air temperature and local heating in cold and local cooling in hot on the mental task performance and psychophysiological responses.
In the experiment 1, eight healthy male subjects stayed in climatic chamber for 40 minutes, which set air temperature conditions (16, 21, 26, 31, or 36 °C) and moderate relative humidity (50%RH) following 26 °C and 50%RH in a pre-room for 30 minutes. Subjects performed calculation task for 5 min four times during experimental room. Physiological measurements were skin temperatures, skin blood flow, and blood pressure. Subjective votes such as thermal sensation, thermal comfort, and arousal level were also measured using the visual analog scale. In local cooling test (experiment 2), five males were sitting rest for 50 min in 25 and 35°C, and then they were locality cooled at neck or lower legs by cold gel pack for 20 min. In local heating test (experiment 3), eight males were sitting rest for 50 min in 16, 21, 26°C, and then they were locality warmed at abdomen by heating system for 40 min.
There was an inverse U-shape relationship between air temperature and mental work performance. And the highest performance was observed at slightly cool conditions which were 21 and 26°C in experiment 1. Mental task performance were improved by both neck and lower leg cooling in a hot environment (experiment 2) and by abdomen heating in a cold environment (experiment 3). Peripheral vasodilation in a hot was suppressed by local cooling and peripheral vasoconstriction in a cold was improved by local heating. These results suggested that local cooling in a hot and local heating in a cold induced the increment of cerebral blood supply during mental task, resulting in the improvement of mental task performance..
|10.||Takafumi Maeda, Effects of seasonal change in basal metabolic rate on the seasonal difference in cold-induced thermogenesis., 2017 Symposium of the Society for the Study of Human Biology & International Association of Physiological Anthropology "Human Biology of Climate Change", 2017.09.|
|11.||Takafumi Maeda, Ryota Takayashiki, Relative humidity and secretory immunoglobulin A, The 1st APACPH Bangkok Region Conference and The 8th International Public Health Conference, 2017.05, Background/Objectives: Infection disease are more prevalent in winter than in summer due to the low humidity condition. However, it was not clear that the relationship relative humidity and secretory immunoglobulin A. The purposes of this study were to clarify the effect of relative humidity on secretory immunoglobulin A.
Methods: Eight healthy male subjects stayed in a climatic chamber for 180 minutes, which set moderate air temperature (25 °C) and three humidity conditions (30, 60, and 90%RH). Saliva samples were collected using the sterilized tube and straw at 0, 90, and 180 min. Secretory immunoglobulin A concentration in saliva samples were determined using the ELISA kits.
Results: It found that secretory immunoglobulin A levels was significantly decreased in 30%RH, significantly increased in 60%RH, and not change in 90%RH during exposure for 180 minutes, and secretory immunoglobulin A level at 180-min during exposure were significantly higher in 60 and 90%RH than in 30%RH condition.
Conclusions: The present study revealed that secretory immunoglobulin A levels decreased in the low relative humidity in the winter season, and increased by humidification in moderate relative humidity. These results suggested that oral immunity function was improved by humidification in winter..
|12.||Takafumi Maeda, Ryota Takayashiki, Effects of relative humidity on secretory immunoglobulin A and cortisol in saliva., The Fifth International Conference on Human–Environment System, 2016.11.|
|13.||Takafumi Maeda, Masanobu Hayashi, Individual Variation in Thermogenesis during Cold Exposure, 20th Congress of the European Anthropological Association, 2016.08.|
|14.||Takafumi Maeda, Cold Adaptability in Human, Immune Function and Environmental Condition, Thermal Stimuli and Mental Task Performance, Research Seminar of NUTRIM School of Nutrition and Translational Research in Metabolism in Maastricht University, 2016.01.|
|15.||Takafumi Maeda, Phenotype of Cold-Induced Thermogenic Resposes, The 12th International Congress of Physiological Anthropology, 2015.10.|
|16.||Koji Kobayashi, Takafumi Maeda, Takeshi Yoneshiro, Mami Matsushita, Masayuki Saito, Relationship between Brown Adipose Tissue Activity and Subcutaneous Tissue Temperature of Supraclavicular Region during Mild Cold Exposure, The 12th International Congress of Physiological Anthropology, 2015.10.|
|17.||Takafumi Maeda, Shoichi Takano, Koji Kobayashi, Effect of Seasonal Variation in Basal Metabolic Rate on Cold-Induced Thermogenesis, International Symposium on Human Adaptation to Environment and Whole-body Coordination, 2015.03.|
|18.||Aritoshi IIDA, Takafumi MAEDA, Shintaro YOKOYAMA, Masashi KURAMAE, Peripheral circulatory responses to oppression, The 4th International Conference of Human-Environment System, 2011.10.|
|19.||Yasuaki OKADA, Takafumi MAEDA, Hiroshi ISHIBASHI, Shinya MORIOKA, Shintaro YOKOYAMA, Masashi, KURAMAE, Relationship between vascular function and thermoregulatory responses to heat and cold exposure; effect of aerobic training, The 4th International Conference of Human-Environment System, 2011.10.|
|20.||Shinya MORIOKA, Takafumi MAEDA, Yasuaki OKADA, Hiroshi ISHIBASHI, Suguru HIROTA, Masashi KURAMAE, Shintaro YOKOYAMA, The relationships between second derivative plenthysmography on thermoregulatory responses to heat stress., The 4th International Conference of Human-Environment System, 2011.10.|
|21.||Takafumi MAEDA, Suguru HIROTA, Hiroshi ISHIBASHI, Yasuaki OKADA, Shintaro YOKOYAMA, Masashi KURAMAE, Disappearance of seasonal variation in the basal metabolic rate in Japanese males, The 10th International Congress of Physiological Anthropology, 2010.09.|
|22.||Takafumi MAEDA, Tetsuhito Fukushima, Masashi KURAMAE, Shintaro YOKOYAMA, Relationship between Vascular Function and Vasoconstrictive Response to Cold, The 13th International Conference of Environmental Ergonomics, 2009.08.|