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    Wyświetlanie 1-6 z 6
    Tytuł:
    Physical fatigue measured by functional MRI
    Autorzy:
    Truszkiewicz, Adrian
    Aebisher, David
    Ożog, Łukasz
    Bartusik-Aebisher, Dorota
    Powiązania:
    https://bibliotekanauki.pl/articles/454820.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
    Tematy:
    functional MRI
    physical fatigue
    physiological condition
    temporary and chronic fatigue
    Opis:
    Introduction. Physical fatigue is a physiological condition that can be measured by functional Magnetic Resonance Imaging (fMRI). Aim. Therefore, this work aims to present the research results currently reported in the scientific literature between the years 2014 and 2018 in the field of chronic fatigue syndrome using the functional MRI method. Material and methods. Analysis of literature. Results. We reviewed here the differences between temporary and chronic fatigue.
    Źródło:
    European Journal of Clinical and Experimental Medicine; 2018, 3; 239-244
    2544-2406
    2544-1361
    Pojawia się w:
    European Journal of Clinical and Experimental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fatigue development mechanisms during increased intensity exertion
    Autorzy:
    Klich, Sebastian
    Powiązania:
    https://bibliotekanauki.pl/articles/1054635.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
    Tematy:
    central fatigue
    free tryptophan
    peripheral fatigue
    physical exertion
    serotonin
    Opis:
    During motor preparation, the attention is paid more and more frequently to the complex significance of fatigue in the case of the achieved sport outcome. The complexity of this process has not been utterly explained so far. It is important to acquire the profound knowledge about the central and peripheral fatigue while explaining this mechanism, because they remain in the background of the human body malfunction. It needs to be emphasized that both fatigue mechanisms should not be analyzed separately, because they are subordinated to one another. The changes mechanism in central nervous system (CNS) influenced by physical exertion leads to reticular formation impairment. This in turn results in analytic and decision making process malfunction. The proper functioning of these centers depends on appropriate neurotransmitters concentration. The short tryptophan to serotonin metabolic pathway plays a significant role in the central fatigue development. The concentration increase of this hormone leads to CNS malfunction, which causes the above mentioned changes. The purpose of this paper was to show, based on the current literature data, the predisposing mechanisms and factors in the development of fatigue.
    Źródło:
    Central European Journal of Sport Sciences and Medicine; 2013, 1, 1; 39-45
    2300-9705
    2353-2807
    Pojawia się w:
    Central European Journal of Sport Sciences and Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The levels of physical activity and fatigue among teachers in Poland and the United Kingdom in the first year after the COVID-19 pandemic
    Autorzy:
    Zalewska, Anna
    Gałczyk, Monika
    Sobolewski, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/31340286.pdf
    Data publikacji:
    2024-05-21
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    Polska
    fatigue
    exercise
    public health
    physical exertion
    United Kingdom
    Opis:
    Background The COVID-19 disease has a negative impact on the psychophysiological health of populations worldwide, including a decrease in overall physical performance and an increase in fatigue. Fatigue was one of the main symptoms reported by patients and persisted for several weeks after infection with COVID-19. Although the phenomenon of fatigue is still poorly understood, physical activity can be a supportive factor in combating feelings of fatigue and lack of energy. The purpose of this research was to assess the physical activity (PA) and fatigue levels of teachers in Poland and the United Kingdom in the first year after the COVID-19 pandemic. Material and Methods The online research was carried out among 410 teachers from Poland and the United Kingdom. The PA level was assessed using the International Physical Activity Questionnaire (IPAQ). The level of fatigue was measured using the Modified Fatigue Impact Scale (MFIS). Results Polish teachers, regardless of sex, are more physically active (the differences relate mainly to walking and moderate activity). When assessing the level of fatigue, there is a significant difference between men and women – the former indicate a higher degree of fatigue, with the difference between the sexes being particularly large in the Polish community. Quite clearly, there is an association between less activity (except walking) and more fatigue. All models show a statistically significant effect of total fatigue on total effort. Physical activity is not very strongly correlated with age but the level of fatigue increases with age. Conclusions The problem of teacher fatigue is unfortunately widespread. They should be encouraged to engage in as much PA as possible during the day. When planning and targeting fatigue reduction campaigns, PA should be encouraged and variables such as age, sex should be taken into account.
    Źródło:
    Medycyna Pracy. Workers’ Health and Safety; 2024, 75, 2; 103-112
    0465-5893
    2353-1339
    Pojawia się w:
    Medycyna Pracy. Workers’ Health and Safety
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Failure oriented diagnostic models in condition monitoring
    Uszkodzeniowo zorientowane modele diagnostyczne w monitorowaniu stanu obiektów technicznych
    Autorzy:
    Radkowski, S.
    Zawisza, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/327258.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    diagnostyka
    model diagnostyczny
    zmęczeniowe wyłamanie zęba
    diagnostics
    physical probabilistic model
    fatigue failure of tooth in gearbox
    Opis:
    Main aim of paper is to present problems of use of physical probabilistic models in task of decreasing of uncertainty of prognosis of raise and evolution of failure. Presented considerations are supported by example of fatigue analysis of tooth breaking in gearbox.
    Głównym celem pracy jest przybliżenie problematyki zastosowania fizykalnych modeli probabilistycznych w zadaniu zmniejszenia niepewności prognozy odnośnie powstawania i ewolucji uszkodzenia. Prezentowane rozważania oparte są na przykładzie zmęczeniowego wyłamania zęba w przekładni zębatej.
    Źródło:
    Diagnostyka; 2009, 4(52); 93-97
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of mutual aerobic and lower limb muscular activity during cycling
    Autorzy:
    Griskevicius, J.
    Daunoraviciene, K.
    Pauk, J.
    Troskovas, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/951811.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    IEMG
    aerobik
    aktywność fizyczna
    mięśnie
    iEMG
    aerobic capability
    physical activity
    veloergometry
    muscular effort
    lower limbs
    muscular fatigue
    Opis:
    The evaluation of physical activity is a complex task that requires performing an analysis of muscular activity and aerobic/anaerobic threshold and it is often difficult to observe and propose a single method. The purpose of the article is to evaluate a relation between aerobic capacity and activity of lower limb muscles via changes of muscle’s EMG signal during physical, sub-maximal veloergometric loading. The activity parameters of 5 lower limb muscles such as semitendinosus, rectus femoris, biceps femoris, gastrocnemius medialis, and tibialis anterior were measured and analyzed during the veloergometric exercise tests and the heart rate and the aerobic capacity were estimated from registered data. The obtained aerobic parameters allow setting an individual and overall voluntary physical capacity. The regression oxygen function presented allows analyzing and predicting the ability of subjects to generate energy while maintaining muscle activity during the exercise. The correlation between the consumption of oxygen and constant physical loading time is determined. It was found that comparing VO2max capabilities the physical effort in the male group was 16% higher than in women. Oxygen consumption and maximum muscle effort dependency on the load time was established. It was observed that the maximal muscular effort appeared before VO2max reached maximal limit in both groups. The maximal oxygen consumption is achieved in the middle or sometimes at the beginning (depending on load) of exercise while maximal muscular effort was found in several phases of cycling: at the beginning and at the end of loading time.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2015, 17, 3; 109-118
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interaction of Physical and Mental Work
    Autorzy:
    Singh, S.
    Aghazadeh, F.
    Ray, T. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/90541.pdf
    Data publikacji:
    2002
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    physical work
    mental work
    psychophysical methods
    acceptable load limit
    fatigue
    praca a choroby
    praca mięśni
    praca umysłowa
    obciążenie pracą umysłową
    obciążenie fizyczne
    zmęczenie
    zmęczenie fizyczne
    Opis:
    The objective of the research was to determine the effect of mental load on the physical capacity of an individual. An experiment involving 9 combinations of lifting tasks, 1 lowering task, and 3 treadmill tasks was conducted. Heart rate was measured and maximum acceptable weight of lift was determined using the psychophysical method. A simple multiplication task was used as the mental load. The output variables were determined with and without the mental task. The results indicate that the individual’s physical capacity decreased with the mental task while lifting from floor to knuckle and shoulder to reach lifting heights.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2002, 8, 4; 451-463
    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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