http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Titis Wijayanto (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Titis Wijayanto,Valentina Kunti Bratadew,Ghani Furqon Abdul Rahma,Moony Sinawang,Harendra Surya Prakasa 대한산업공학회 2019 Industrial Engineeering & Management Systems Vol.18 No.4
It has been reported that internal precooling via fluid ingestion is useful for hyperthermia prevention during exercise;however, its application in the occupational setting is unclear. This study aims to compare the effect of pre-coolingusing cold fluid and crushed ice ingestion on thermoregulatory responses during simulated occupational activity in ahot and humid environment. Nine healthy males completed treadmill exercise for 30-min at an intensity of 65% ofpredetermined HRmax in a chamber set at 36.6±0.8ºC of air temperature and 72±6% of relative humidity. Before theexercise, they preceded ingested 7.5 ml kg-1 body mass of cold drink (4ºC), crushed ice (-2ºC), or mineral water(28ºC) for pre-cooling. Ingesting crushed ice before the activity significantly lowered the pre-activity tympanic temperature than the cold beverage. Also, crushed ice ingestion showed more significant effects in lowering heart rate andimproving heat sink at the post-activity phase compared to cold beverage ingestion. These findings suggest thatcrushed ice ingestion may be more practical to minimize physiological and subjective thermal strain during occupational activity than ingesting cold fluid.
-
Wakabayashi, Hitoshi,Wijayanto, Titis,Lee, Joo-Young,Hashiguchi, Nobuko,Saat, Mohamed,Tochihara, Yutaka BioMed Central 2014 Journal of Physiological Anthropology Vol.33 No.1
<P><B>Background</B></P><P>This study investigated the effect of hydration differences on body fluid and temperature regulation between tropical and temperate indigenes exercising in the heat.</P><P><B>Methods</B></P><P>Ten Japanese and ten Malaysian males with matched physical characteristics (height, body weight, and peak oxygen consumption) participated in this study. Participants performed exercise for 60 min at 55% peak oxygen uptake followed by a 30-min recovery at 32°C and 70% relative air humidity with hydration (4 times each, 3 mL per kg body weight, 37°C) or without hydration. Rectal temperature, skin temperature, heart rate, skin blood flow, and blood pressure were measured continuously. The percentage of body weight loss and total sweat loss were calculated from body weight measurements. The percentage change in plasma volume was estimated from hemoglobin concentration and hematocrit.</P><P><B>Results</B></P><P>Malaysian participants had a significantly lower rectal temperature, a smaller reduction in plasma volume, and a lower heart rate in the hydrated condition than in the non-hydrated condition at the end of exercise (<I>P</I> <0.05), whereas Japanese participants showed no difference between the two hydration conditions. Hydration induced a greater total sweat loss in both groups (<I>P</I> <0.05), and the percentage of body weight loss in hydrated Malaysians was significantly less than in hydrated Japanese (<I>P</I> <0.05). A significant interaction between groups and hydration conditions was observed for the percentage of mean cutaneous vascular conductance during exercise relative to baseline (<I>P</I> <0.05).</P><P><B>Conclusions</B></P><P>The smaller reduction in plasma volume and percentage body weight loss in hydrated Malaysians indicated an advantage in body fluid regulation. This may enable Malaysians to reserve more blood for circulation and heat dissipation and thereby maintain lower rectal temperatures in a hydrated condition.</P>
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
