Effect of Clothing on Work Load in Large-Scale Greenhouse under Hot Environment
【Supercategory：7. DESCENTE SPORTS SCIENCE Subcategory：7.42 Vol.42】
ABSTRACT
We investigated the effect of clothing environment on workload for tomato cultivation work in a greenhouse. The WBGT （Wet bulb globe temperature） , ECG （Electrocardiogram） , tympanic temperature, subjective evaluation such as comfort, subjective work intensity and temperature and humidity in clothes were measured. The following six clothing conditions were used: shirt only, shirt only with mask, cooling vest over the shirt, cooling vest under the shirt, cloth with fans, and cooling vest under the cloth with fans. As a result, the followings were obtained. （1） The WBGT in a greenhouse was over 31 degrees even in the morning, and the risk of heat stroke was very high.（2） According to the %HRR （Percentage of Heart Rate Reserve） of ECG, wearing a mask tended to increase slightly the exercise intensity, and wearing a cooling vest or a cloth with fans tended to decrease the exercise intensity. （3） Subjective work intensity was assessed to be higher in wearing a mask and lower in wearing a cooling vest. （4） The results of the measurement of temperature and humidity inside the clothes showed that the cloth with fans kept the humidity inside the clothes low. It was confirmed that the clothes with fans was effective in lowering the temperature and humidity inside the clothes.
DECENTE SPORTS SCIENCE Vol.42/The DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
We investigated the effect of clothing environment on workload for tomato cultivation work in a greenhouse. The WBGT （Wet bulb globe temperature） , ECG （Electrocardiogram） , tympanic temperature, subjective evaluation such as comfort, subjective work intensity and temperature and humidity in clothes were measured. The following six clothing conditions were used: shirt only, shirt only with mask, cooling vest over the shirt, cooling vest under the shirt, cloth with fans, and cooling vest under the cloth with fans. As a result, the followings were obtained. （1） The WBGT in a greenhouse was over 31 degrees even in the morning, and the risk of heat stroke was very high.（2） According to the %HRR （Percentage of Heart Rate Reserve） of ECG, wearing a mask tended to increase slightly the exercise intensity, and wearing a cooling vest or a cloth with fans tended to decrease the exercise intensity. （3） Subjective work intensity was assessed to be higher in wearing a mask and lower in wearing a cooling vest. （4） The results of the measurement of temperature and humidity inside the clothes showed that the cloth with fans kept the humidity inside the clothes low. It was confirmed that the clothes with fans was effective in lowering the temperature and humidity inside the clothes.
DECENTE SPORTS SCIENCE Vol.42/The DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
| Researcher | *1 Toshio Matsuoka, *2 Yousuke Isoyama, *2 Hatsuyoshi Kitamura |
|---|---|
| University or institution | Mie Prefectural Industrial Research Institute*1, Mie Prefecture Agricultural Research Institute*2 |
Keywords
Climate in clothes, Heart rate, Sensory evaluation, Wet bulb globe temperature, Agricultural work