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    Wyświetlanie 1-6 z 6
    Tytuł:
    Test of Firefighter’s Turnout Gear in Hot and Humid Air Exposure
    Autorzy:
    Holmer, I.
    Kuklane, K.
    Gao, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/90221.pdf
    Data publikacji:
    2006
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    body temperature
    heat stress
    physiological strain
    protective clothing
    odzież ochronna
    straż pożarna
    pożar
    temperatura powietrza
    temperatura ciała
    stres
    zagrożenia zawodowe
    strażak
    Opis:
    Five students of a rescue training school cycled at 50 W for 20 min at 20 oC before walking at 5 km/hr up to 30 min in a climatic chamber at 55 oC and 30% relative humidity. 4 different types of clothing ensembles differing in terms of thickness and thermal insulation value were tested on separate days. All subjects completed 28–30 min in light clothing, but quit after 20–27 min in 3 firefighter ensembles due to a rectal temperature of 39 oC or subjective fatigue. No difference in the evolution of mean skin or rectal temperature was seen for the 3 turnout ensembles. Sweat production amounted to about 1000 g in the turnout gears of which less than 20% evaporated. It was concluded that the small differences between the turnout gears in terms of design, thickness and insulation value had no effect on the resulting heat physiological strain for the given experimental conditions.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2006, 12, 3; 297-305
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physiological Evaluation of Chemical Protective Suit Systems (CPSS) in Hot Conditions
    Autorzy:
    Ilmarinen, R.
    Lindholm, H.
    Koivistoinen, K.
    Helisten, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/90435.pdf
    Data publikacji:
    2004
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    chemical protective suit
    hot conditions
    physiological strain
    odzież ochronna
    substancje szkodliwe
    straż pożarna
    zagrożenia chemiczne
    stres
    ratownictwo
    Opis:
    This job-related experiment investigated physiological strain in subjects wearing impermeable chemical protective suit systems (CPSSs) weighing about 28 kg. Two types of CPSSs were studied: the self-contained breathing apparatus was carried either inside or outside the suit. Eight healthy and physically fit male firefighter instructors aged 32 to 45 years volunteered for the study. The test drill, performed at a dry, windless ta of 40 °C, was divided into 2 consecutive work sessions of 14.5 min (a 20-min rest between) including typical operational work tasks. Considerable thermal and maximal cardiovascular strain and intense subjective discomfort measured in the firefighters emphasize the need to limit working time in hot conditions to only 10-12 min while wearing CPSSs. The present results indicate that the exceptionally heavy physical load and psychological stress during operations in chemical emergencies must be considered in the assessment of the cardiovascular capacity of ageing firefighters using CPSSs.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2004, 10, 3; 215-226
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany wybranych wskaźników fizjologicznych oraz ocena stresu cieplnego pod wpływem kąpieli w saunie suchej i mokrej u młodych zdrowych kobiet
    Changes in selected physiological indicators and thermal stress assessment under the influence of baths in a dry and wet sauna in young healthy women
    Autorzy:
    Pilch, Wanda
    Piotrowska, Anna
    Czerwińska-Ledwig, Olga
    Zuziak, Roxana
    Maciejczyk, Marcin
    Tota, Łukasz
    Bawelski, Marek
    Pałka, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/2162643.pdf
    Data publikacji:
    2019-12-03
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    temperatura ciała
    sauna sucha
    sauna mokra
    stres cieplny
    odczuwanie temperatury
    obciążenie fizjologiczne
    body temperature
    dry sauna
    wet sauna
    heat stress
    temperature sense
    physiological strain
    Opis:
    Wstęp Kąpiele w saunie suchej i w łaźni parowej ze względu na różny stopień obciążenia cieplnego wywołują też różne reakcje organizmu. Duża wilgotność powietrza w saunie mokrej utrudnia parowanie potu ze skóry. Ponadto dynamika pocenia się jest różna u kobiet i mężczyzn. Celem pracy była analiza zmian wskaźników fizjologicznych oraz porównanie wpływu sauny suchej i mokrej na odczucie komfortu cieplnego ocenianego w skali termicznej Bedforda, a także zbadanie wielkości obciążenia fizjologicznego (physiological strain index – PSI) i skumulowanego wskaźnika obciążeń cieplnych (cumulative heat stress index − CHSI) u młodych zdrowych kobiet. Materiał i metody W badaniach wzięło udział 10 kobiet w wieku 22−24 lat. Pomiary w obu typach sauny prowadzono w fazie folikularnej cyklu miesięcznego. Każda sesja trwała 60 min i składała się z trzech 15-minutowych ekspozycji cieplnych z 5-minutowymi przerwami na odpoczynek i schłodzenie wodą. Temperatura w saunie suchej wynosiła 91±1,2°C, w mokrej – 59±1,3°C; wilgotność powietrza, odpowiednio: 18±0,7% i 60,5±0,8%. Dokonano pomiarów masy ciała, ciśnienia skurczowego (systolic blood pressure − SBP) i rozkurczowego (diastolic blood pressure − DBP), częstości skurczów serca (heart rate − HR), temperatury rektalnej ($ \text{T}_\text{re} $) i odczuć termicznych według skali Bedforda. Wyliczono współczynniki obciążenia fizjologicznego: PSI oraz CHSI. Wyniki Po saunie suchej średnie ubytki masy ciała badanych kobiet były istotnie wyższe niż po kąpieli w saunie mokrej. Po zabiegu w saunie mokrej zaobserwowano istotnie większe przyrosty $ \text{T}_\text{re} $ oraz HR. Oba zabiegi powodowały wzrost SBP. Podczas obu kąpieli ciśnienie rozkurczowe ulegało obniżeniu. Subiektywne odczucie uciążliwości zabiegu oraz PSI i CHSI było większe podczas kąpieli w saunie mokrej. Wnioski Ekspozycja cieplna w saunie mokrej stanowi większe obciążenie dla organizmu młodych kobiet niż taki sam zabieg w saunie suchej, a zmiany badanych cech są większe od tych, które zaobserwowano u mężczyzn poddanych podobnym obciążeniom termicznym. Med. Pr. 2019;70(6):701–710
    Background There are differences between dry and wet sauna baths because of the heat load and human body’s reactions. High humidity in a wet sauna makes evaporation of sweat from the skin surface more difficult. In addition, the dynamics of sweating is different in men and women. The aim of the study was to assess changes in physiological indicators and to compare the impact of dry and wet saunas on the thermal comfort feeling, which was assessed using the Bedford thermal scale, and the physiological strain index (PSI) and the cumulative heat stress index (CHSI) in young healthy women. Material and Methods Ten women aged 22−24 years took part in the study. A session in each sauna lasted 60 min and consisted of 3 thermal 15-min exposures, in 5-min intervals for rest and cooling with water. The temperature in the dry sauna was 91±1.2°C and in the wet sauna 59±1.3°C, while the humidity was 18±0.7% and 60.5±0.8%, respectively. Body weight, systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate (HR), rectal temperature ($ \text{T}_\text{re} $) and the thermal sensation (Bedford scale) were also measured. The PSI and CHSI values were both calculated. Results The average weight loss after a dry sauna bath was significantly higher than after a wet sauna bath. Significantly higher increases in $ \text{T}_\text{re} $, as well as in HR were observed after treatment in the wet sauna, compared to the dry sauna. Both treatments resulted in an increase in SBP and a decrease in DBP. The arduousness of thermal discomfort and the levels of PSI and CHSI were skurgreater in the wet sauna bathing than in the dry sauna. Conclusions Heat exposure in the wet sauna creates a greater burden for young women’s bodies than the same dry sauna treatment, and the changes observed in the examined traits were higher than in men subjected to similar thermal loads. Med Pr. 2019;70(6):701–10
    Źródło:
    Medycyna Pracy; 2019, 70, 6; 701-710
    0465-5893
    2353-1339
    Pojawia się w:
    Medycyna Pracy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Long-distance Running and its Effects on Cardiorespiratory Adaptation and Physiological Strain in Marathon Runners
    Autorzy:
    Przybyła, Katarzyna
    Żebrowska, Aleksandra
    Posmysz, Anna
    Manowska, Beata
    Pokora, Ilona
    Żak, Agata
    Powiązania:
    https://bibliotekanauki.pl/articles/1054890.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
    Tematy:
    marathon
    physiological strain index
    spirometry
    Opis:
    Popularity of long-distance running has increased as well as number of female and male marathon runners. Whilst research into physiological characteristics of endurance trained athletes has significantly increased there are only few studies on the risk factors for respiratory failure in marathon runners. Therefore, the aim of the study was to evaluate the differences in respiratory function and the physiological strain in the response to exercise stress in marathon runners. Twenty three subjects (aged 36.1 ±11.6 years) participated in a marathon running. Prior to the run and after its completion, body mass and composition, spirometry and body temperature were measured. Based on pre- and post-run temperature and changes in heart rate, the physiological strain index (PSI) was calculated. Long-distance running significantly decreased the temperature of body surfaces (p < 0.05); no significant effects were observed regarding aural canal temperature and physiological strain index (PSI). Compared to resting values, post-marathon spirometry revealed a significant decrease in post-marathon forced expiratory volume (p < 0.05), peak expiratory flow (p < 0.05) and maximal expiratory flow values (p < 0.05). In conclusion, the long-distance running results in functional changes within the respiratory system which may limit the adaptive potential and decrease exercise tolerance.
    Źródło:
    Central European Journal of Sport Sciences and Medicine; 2016, 13, 1; 81-87
    2300-9705
    2353-2807
    Pojawia się w:
    Central European Journal of Sport Sciences and Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physiological strain in the Hungarian mining industry: The impact of physical and psychological factors
    Autorzy:
    Varga, József
    Nagy, Imre
    Szirtes, László
    Pórszász, János
    Powiązania:
    https://bibliotekanauki.pl/articles/2177421.pdf
    Data publikacji:
    2016-06-30
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    work-related complex stress
    physiological strain
    health protection and promotion
    work pulse
    work-related accidents
    workplace illumination
    Opis:
    Objectives The objectives of these investigations completed on workplaces in the Hungarian mining industry were to characterize the physiological strain of workers by means of work pulse and to examine the effects of work-related psychological factors. Material and Methods Continuous heart rate (HR) recording was completed on 71 miners over a total of 794 shifts between 1987 and 1992 in mining plants of the Hungarian mining industry using a 6-channel recorder – Bioport (ZAK, Germany). The work processes were simultaneously documented by video recording along with drawing up the traditional ergonomic workday schedule. All workers passed health evaluation for fitness for work. The effects of different psychological factors (simulated danger, “instrument stress,” presence of managers, and effect of prior involvement in accidents as well as different mining technologies and work place illumination) on the work pulse were evaluated. The statistical analysis was completed using SPSS software (version 13.0, SPSS Inc., USA). Results The work-related physiological strain differed between work places with different mining technologies in groups of 12–18 workers. The work pulse was lowest in bauxite mining (ΔHR = 22±8.9 bpm) and highest in drift drilling in dead rock with electric drilling machine (ΔHR = 30±6.9 bpm). During sham alarm situation the work pulse was significantly higher than during normal activities with the same physical task (ΔHR = 36.7±4.8 bpm vs. 25.8±1.6 bpm, p < 0.001). When work was performed under different psychological stress, the work pulse was consistently higher, while improving the work place illumination decreased the physiological strain appreciably (ΔHR (median, 25–75 percentiles) = 23, 20–26 bmp vs. 28, 25–31.3 bpm, p < 0.001). Conclusions Recording the heart rate during whole-shift work along with the work conditions gives reliable results and helps isolating factors that contribute to increased strain. The results can be used to implement preventive and health promotion measures.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2016, 29, 4; 597-611
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ergonomics in Practice: Physical Workload and Heat Stress in Thailand
    Autorzy:
    Yoopat, P.
    Toicharoen, P.
    Glinsukon, T.
    Vanwonterghem, K.
    Louhevaara, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/91204.pdf
    Data publikacji:
    2002
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    ergonomics
    heat stress
    physiological strain
    ciepło
    Tajlandia
    ergonomia
    obciążenie pracą umysłową
    stres
    praca w wysokiej temperaturze
    fizjologia pracy
    warunki pracy
    Opis:
    This study consists of assessments of the thermal environment and physiological strain in tasks associated with airport, construction, and metal jobs. The number of male and female participants was 108. Environmental heat stress was evaluated with the WBGT index. Physiological strain was evaluated by the relative cardiovascular load (%CVL) based on the measurements of heart rate. Also the increase of body temperature, weight loss, and perceived discomfort were determinated. At work sites the assessments lasted for 2 to 4 hrs for each participant. The mean physiological strain exceeded the level of 30%CVL. Severe peaks (over 60%CVL) were observed in specific tasks being in agreement with perceived discomfort ratings. The increase of body temperature and weight loss in most cases remained within acceptable limits. For the most strenuous tasks, various ergonomic improvements were developed in consultation with workers and managers.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2002, 8, 1; 83-93
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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