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Wyszukujesz frazę "fitness" wg kryterium: Temat


Wyświetlanie 1-6 z 6
Tytuł:
Sustained Operations in Confined-Space Military Vehicles
Autorzy:
Delleman, N. J.
Colaciuri, V.
Wiederkehr, E.
Valk, P. J. L.
Powiązania:
https://bibliotekanauki.pl/articles/90042.pdf
Data publikacji:
2008
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
fitness
performance
active breaks
Opis:
This paper reports 2 baseline studies and 1 experiment performed in a confined-space military vehicle concerning the effects on fitness and performance of time in a sitting posture and workstation characteristics. On average physical fitness decreased by slightly more than 10% per hour, the observation performance decreased by ~30% per hour, and the technical performance (of gunners) showed a relatively small decrease, i.e., less than 5% per hour. So-called active breaks (changing sitting into standing and walking) led to a significant reduction in the decrease of physical fitness, almost reducing it to zero. Furthermore, the level of confinement was shown to affect physical fitness.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2008, 14, 3; 313-325
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Two-Dimensional Automatic Control Modeling of a Posture Control System
Autorzy:
Park, K. S.
Kim, U. H.
Powiązania:
https://bibliotekanauki.pl/articles/90283.pdf
Data publikacji:
1998
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
posture control model
posturography
perturbation
parameter identification
model fitness
stability
predictability
model kontroli
postura
posturografia
identyfikacja parametrów
fitness
Opis:
A posture control model has been developed on the basis of the 2-dimensional feedback control theory. Human postural characteristics were investigated in 5 healthy participants. Tests were performed with eyes open and eyes closed. After 5 s of quiet standing, each participant was unexpectedly pulled forward by 30 mm at his pelvis height and then released. Postural sway was measured over 20 s at a rate of 100 per second. Transfer functions to represent the posture control characteristic were identified by the least squares' method. These showed good results of the model's fitness, predictability, and stability. The response of the eyes-closed condition to perturbation is more oscillatory than that of the eyes-open condition. It seems that the model identified could be applicable to ergonomics, sports, or clinical situations.
Źródło:
International Journal of Occupational Safety and Ergonomics; 1998, 4, 4; 485-498
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Body Characteristic Index to Evaluate the Level of Risk of Heat Strain for a Group of Workers With a Test
Autorzy:
Lu, S.
Peng, H.
Gao, P.
Powiązania:
https://bibliotekanauki.pl/articles/89730.pdf
Data publikacji:
2014
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
heat environment
physical fitness
anthropometric characteristic
index
heat strain
środowisko cieplne
sprawność fizyczna
antropometria
Opis:
The purpose of this study was to develop a body characteristic index (BCI) based on the distribution of maximal oxygen uptake per body mass (VO2max/mass), body surface area per body mass (BSA/mass), and percentage of body fat (Fat%) to evaluate the relative level of individual physiological responses to heat strain in a group of workers. BCI was based upon the data obtained from 10 males and 10 females exercising for 60 min on a treadmill at 2 relative exercise intensities of 25% and 45% VO2max in mild, warm wet, and hot dry climate condition, separately. BCI was developed into 2 formulas, which were proved to be better predictors for heat strain responses than each individual characteristic, and more sensitive than body type to describe the distributions of individual characteristics and distinguish the differences in physiological responses to heat.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2014, 20, 4; 647-659
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Thermal Stress Treadmill Walk for Clinic Evaluation of Candidates for Hazardous Materials (HazMat) Duty
Autorzy:
Raymond, L. W.
Barringer, T. A.
Powiązania:
https://bibliotekanauki.pl/articles/90850.pdf
Data publikacji:
2014
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
heat stress
hazardous materials
medical evaluation
fitness for duty
electrocardiography
stres cieplny
materiały niebezpieczne
elektrokardiografia
Opis:
U.S. guidance for examining hazmat workers recommends stress testing be considered when heat stress is expected. However, the most common stress test—Bruce protocol treadmill electrocardiography (BPTE) wearing gym clothes—creates little thermal stress. Objective. Evaluate a novel thermal stress treadmill walk (TSTW). Methods. Body temperatures and heart rates during BPTE in 93 current and potential hazmat workers wearing gym clothes were compared with later values in 35 of these subjects while they were wearing thermally-restrictive “sauna suits” during a 45-min TSTW. Physiological strain index (PSI) was calculated from temperature and heart rate changes and compared with PSI values from hazmat simulations and climatic chamber exercises. Results. Tympanic temperature (TT) rose 0.5 °C (SD 0.5) during BPTE lasting 12.4 min (SD 2.9). PSI reached 6.0 (SD 1.3). TT rose 1.0 °C (SD 0.5) during TSTW, p < .01. PSI averaged 6.6 (SD 1.9) in 29 subjects who completed TSTW, versus 5.7 (SD 5.7) in the 6 subjects who did not. Ingested thermistor temperatures increased more than did TT during TSTW, yielding PSI of 7.0 (SD 1.5), equal to PSI values from climatic chamber exercises, i.e., 7.0 (SD 1.0). Conclusion. TSTW increased body temperature and PSI in 29 of the 35 subjects who completed it to levels matching those of operational simulations in climatic chambers and during hazmat exercises. This TSTW may be useful for evaluating candidates for hazmat duty.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2014, 20, 2; 281-293
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Age on Aerobic Capacity and Health Indicators of Three Rescue Groups
Autorzy:
Prieto, J. A.
Gonzalez, V.
Del Valle, M.
Nistal, P.
Powiązania:
https://bibliotekanauki.pl/articles/90737.pdf
Data publikacji:
2013
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
physical aptitude
fitness
VO2 max
body mass index
rescue groups
siłownia
sprawność fizyczna
wskaźnik masy ciała
Opis:
The aim of this study was to determine the relationship between age, aerobic capacity (VO2 max) and other health indicators among 3 rescue groups. The type of training and the subjective perception of physical fitness obtained via the Assessment Questionnaire of Physical Fitness were also analysed. To obtain VO2 max, 37 firefighters, 22 lifeguards and 59 mine rescue workers had a treadmill test. Their body mass index and body fat percentage were also calculated. The results show a significant decline in VO2 max of the older participants, which affects the effectiveness of rescue work. Furthermore, the training of all groups was inconsistent and based on individual needs. Variable training and the decline in VO2 max with age affected the effectiveness of the rescue tasks of each group.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2013, 19, 1; 19-27
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Refinery Firefighters: Assessing Fitness for Duty
Autorzy:
Fogleman, M.
Bhojani, F. A.
Powiązania:
https://bibliotekanauki.pl/articles/89911.pdf
Data publikacji:
2005
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
firefighters
fitness for duty
niebezpieczeństwo pożaru
miejsce zagrożone wybuchem
straż pożarna
rafinacja ropy naftowej
badanie zdrowia zawodowego
zdolność do pracy
strażak
Opis:
Firefighting is a hazardous and physically demanding activity. The demanding nature of the tasks involved in firefighting requires a high level of fitness both for the safety of the firefighting personnel as well as for the adequate performance of their tasks. Here, the characteristics (body weight, lung function, etc.) of a small group of refinery firefighters were investigated using exploratory factor analysis and discriminant analysis. The results indicated that there is a group of factors that characterize those individuals meeting minimum fitness requirements as described previously in the literature. The factors that were identified included those related to anthropometry (such as body composition and weight) and those related to physical capabilities (such as push-ups). Since these data are collected relatively easily in most occupational settings, they may offer an efficient surrogate method to determine fitness for duty among firefighters.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2005, 11, 2; 161-170
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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