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    Wyświetlanie 1-12 z 12
    Tytuł:
    Physical Capacity of Occupationally Active Population and Capability to Perform Physical Work
    Autorzy:
    Bugajska, J.
    Makowiec-Dąbrowska, T.
    Bortkiewicz, A.
    Gadzicka, E.
    Marszałek, A.
    Lewandowski, Z.
    Konarska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/91177.pdf
    Data publikacji:
    2011
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    physical capacity
    maximal oxygen consumption (VO2max)
    work requirements
    Opis:
    The aim of this study was to determine what proportion of occupationally active Poles have working capacity that enables them to tolerate hard and very hard physical work. For this purpose physical capacity of 1188 occupationally active subjects (524 women and 664 men), aged 18–64 years was examined. Their maximal oxygen consumption (VO2max) was determined indirectly on the basis of their heart rate during an incremental exercise test on a bicycle ergometer. It was found that hard occupational physical work was an excessive load for almost 40% of men and women. This paper discusses how this load should be decreased with planned, appropriately long rest breaks. The percentage of persons for whom their hard physical work becomes an excessive load increases with age to such a degree that a new assessment of individual capability for such work is recommended for persons over 40 years old.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2011, 17, 2; 129-138
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of Aerobic Capacity and Determination of Its Associated Factors Among Male Workers of Industrial Sector of Iran
    Autorzy:
    Daneshmandi, H.
    Fard, A. R.
    Choobineh, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/89945.pdf
    Data publikacji:
    2013
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    ergocycle test
    Astrand protocol
    aerobic capacity
    VO2 max
    pracownicy sektora przemysłowego
    wydolność tlenowa
    Iran
    Opis:
    Introduction. The aim of this study was to estimate maximal aerobic capacity (VO2 max), to determine its associated factors among workers of industrial sector of Iran and to develop a regression equation for subjects’ VO2 max. Methods. In this study, 500 healthy male workers employed in Shiraz industries participated voluntarily. The subjects’ VO2 max was assessed with the ergocycle test according to the Åstrand protocol. Required data was collected with a questionnaire covering demographic details (i.e., age, job tenure, marital status, education, nature of work, shift work, smoking and weekly exercises). Results. The subject’s mean VO2 max was 2.69 ± 0.263 l/min. The results showed that there was an association between VO2 max and age, BMI, hours of exercise and smoking, but there was no association between VO2 max and height, weight, nature of work and working schedule. On the basis of the results, regression equations were developed to estimate VO2 max. Conclusion. Final regression equation developed in this study may be used to estimate VO2 max reliably without the need to use other laboratory instruments for aerobic measurement.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2013, 19, 4; 667-673
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance on a Work-Simulating Firefighter Test Versus Approved Laboratory Tests for Firefighters and Applicants
    Autorzy:
    Von Heimburg, E.
    Medbo, J. I.
    Sandsund, M.
    Reinertsen, R. E.
    Powiązania:
    https://bibliotekanauki.pl/articles/90966.pdf
    Data publikacji:
    2013
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    endurance
    fire fighting
    gender
    blood lactate concentration
    VO2
    strength tests
    straż pożarna
    wiek
    wytrzymałość zmęczeniowa
    test umiejętnościowy
    strażak
    doświadczenie zawodowe
    Opis:
    Aim. Firefighters must meet minimum physical demands. The Norwegian Labour Inspection Authority (NLIA) has approved a standardised treadmill walking test and 3 simple strength tests for smoke divers. The results of the Trondheim test were compared with those of the NLIA tests taking into account possible effects of age, experience level and gender. Methods. Four groups of participants took part in the tests: 19 young experienced firefighters, 24 senior male firefighters and inexperienced applicants, 12 male and 8 female. Results. Oxygen uptake (VO2) at exhaustion rose linearly by the duration of the treadmill test. Time spent on the Trondheim test was closely related to performance time and peak VO2 on the treadmill test. Senior experienced firefighters did not perform better than equally fit young applicants. However, female applicants performed poorer on the Trondheim test than on the treadmill test. Performance on the Trondheim test was not closely related to muscle strength beyond a minimum. Conclusion. Firefighters completing the Trondheim test in under 19 min fit the requirements of the NLIA treadmill test. The Trondheim test can be used as an alternative to the NLIA tests for testing aerobic fitness but not for muscular strength. Women’s result of the Trondheim test were poorer than the results of the NLIA treadmill test, probably because of their lower body mass.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2013, 19, 2; 227-243
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effects of a 10-week step aerobics training on vo 2 max, isometric strength and body composition of young women
    Autorzy:
    Drobnik-Kozakiewicz, Izabela
    Sawczyn, Michał
    Zarębska, Aleksandra
    Kwitniewska, Anna
    Szumilewicz, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/1054679.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
    Tematy:
    VO2 max
    body composition
    isometric strength
    step aerobics
    Opis:
    Health status is partly determined by physical fitness level. Physical fitness can be developed through different physical activities under condition that regularity and intensity are maintained on optimal level. One of such physical activities is step aerobics - one of the most popular collective fitness forms offered in fitness clubs. The objective of this study was to evaluate the influence of step aerobics training on VO2max, isometric strength and body composition of young female students. Female students aged 19-21 of University of Physical Education and Sport in Gdańsk were subjects in this study. VO2max, isometric strength of elbow flexors and knee extensors, as well as body composition, were measured week before and week after a ten-week step aerobics training. For statistical analysis, basic descriptive statistics and student’s t-test were applied for dependent variables. After ten weeks of training there were no statistically significant changes in body composition, probably due to lack of calorie intake control. Significant changes were observed in isometric strength of elbow flexors but no changes in isometric strength of knee extensors. There was a compensation in isometric strength noted between left and right leg after ten weeks of training, where left leg was weaker than the right leg before training. Significant changes were noted in VO2max values, which increased from 42.04 ml/kg/min-1 to 45.71 ml/kg/min-1. Step aerobics training can sufficiently increase VO2max in young females and has a potential in developing strength of upper extremities. When body composition is the main purpose, diet should be taken under consideration.
    Źródło:
    Central European Journal of Sport Sciences and Medicine; 2013, 4, 4; 3-9
    2300-9705
    2353-2807
    Pojawia się w:
    Central European Journal of Sport Sciences and Medicine
    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:
    Case study: the exercise profile of a Polish representative in mountain running
    Autorzy:
    Borysiuk, Zbigniew
    Piechota, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/1055129.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
    Tematy:
    VO2max
    individual training
    long distance running
    periods in sports training
    Opis:
    This study is aimed at analysing the variability of oxygen parameters in subsequent annual training cycles at championship training level in mountain running. The study employed the following indirect methods: the Astrand Test, Conconi Running Test, and also a direct method (Bruce Test). Research material is a young, talented 28-year-old athletic mountain runner. Research results were obtained within 4-5 years period, which were as follows: VO2max 83-90ml/kg/min - increased on average to 2-3 ml / kg / min per year, HR max 172-177 beats / min, PPA 158-169 beats / min. The case study was carried out within the framework of longitudinal research and was used to collect data for the formulation of a specific exercise profile in a new, dynamic sports discipline. The research aims to serve as an example of a novel method of conducting training microcycles to the cyclic lifting aerobic capacity athletes.
    Źródło:
    Central European Journal of Sport Sciences and Medicine; 2014, 5, 1; 35-45
    2300-9705
    2353-2807
    Pojawia się w:
    Central European Journal of Sport Sciences and Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of 3D kinematic and electromyographical parameters on cycling economy
    Autorzy:
    Sinclair, J.
    Hebron, J.
    Atkinson, S.
    Hurst, H.
    Taylor, P. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/306495.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    rower
    sport
    ekonomia
    VO2
    cycling
    economy
    Opis:
    Purpose: Economy is considered to be a key factor for the determination of performance in endurance events such as cycling. There have been no investigations which have related cycling economy to simultaneous measurements of 3D kinematics and muscular activation. This study examined selected biomechanical and neuromuscular parameters which have the strongest association with cycling economy. Methods: Twenty-five trained cyclists (31.27±3.19 years) completed steady state cycling time trials at a workload of 180 W. Simultaneous measurements of 3D kinematics and electromyographical parameters were obtained. Continuous measurements of expired gases were used to provide a measure of cycling economy. Results: A multiple regression analysis showed that key parameters of peak knee extension velocity and mean activity of the rectus femoris muscles were significant predictors of VO2 during steady state cycling (P<0.01). Conclusion: This study has documented the key biomechanical parameters pertinent to cycling economy. As economy has been shown to influence aerobic performance, future work should focus on optimising these parameters to improve cycling economy.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2014, 16, 4; 91-97
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessing peak aerobic capacity in Dutch law enforcement officers
    Autorzy:
    Wittink, Harriet
    Takken, Tim
    de Groot, Janke
    Reneman, Michiel
    Peters, Roelof
    Vanhees, Luc
    Powiązania:
    https://bibliotekanauki.pl/articles/2177371.pdf
    Data publikacji:
    2015-05-18
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    aerobic capacity
    VO2peak
    prediction equations
    maximal exercise test
    bicycle protocol
    law enforcement officers
    Opis:
    Objectives To cross-validate the existing peak rate of oxygen consumption (VO₂peak) prediction equations in Dutch law enforcement officers and to determine whether these prediction equations can be used to predict VO₂ₚₑₐₖ for groups and in a single individual. A further objective was to report normative absolute and relative VO₂ₚₑₐₖ values of a sample of law enforcement officers in the Netherlands. Material and Methods The peak rate of oxygen consumption (ml×kg⁻¹×min⁻¹) was measured using a maximal incremental bicycle test in 1530 subjects, including 1068 male and 461 female police officers. Validity of the prediction equations for groups was assessed by comparing predicted VO₂ₚₑₐₖ with measured VO₂ₚₑₐₖ using paired t-tests. For individual differences limits of agreement (LoA) were calculated. Equations were considered valid for individuals when the difference between measured and predicted VO₂ₚₑₐₖ did not exceed ±1 metabolic equivalent (MET) in 95% of individuals. Results None of the equations met the validity criterion of 95% of individuals having ±1 MET difference or less than the measured value. Limits of agreement (LoAs) were large in all predictions. At the individual level, none of the equations were valid predictors of VO₂ₚₑₐₖ (ml×kg⁻¹×min⁻¹). Normative values for Dutch law enforcement officers were presented. Conclusions Substantial differences between measured and predicted VO₂ₚₑₐₖ (ml×kg⁻¹×min⁻¹) were found. Most tested equations were invalid predictors of VO₂ₚₑₐₖ at group level and all were invalid at individual levels.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2015, 28, 3; 519-531
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of energy boost and springblade footwear on running economy and substrate oxidation
    Autorzy:
    Sinclair, Jonathan
    Dillon, Stephanie
    Powiązania:
    https://bibliotekanauki.pl/articles/1055239.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
    Tematy:
    Running
    VO2
    economy
    footwear
    Opis:
    The current study aimed to investigate the influence of energy boost, spring and conventional footwear on running economy and substrate usage. Ten male runners completed 5 min steady state runs in energy boost, spring and conventional footwear. Running economy and percent contribution of carbohydrate to total calorie expenditure were assessed. Participants also subjectively indicated which shoe condition they preferred for running. Differences between footwear were examined using repeated measures ANOVA. The results showed firstly that running economy was significantly improved in the energy return (33.36 ml.kg.min -1) compared to spring (34.83 ml.kg.min -1) and conventional footwear (34.65 ml.kg.min -1). In addition, percent carbohydrate was significantly lower in the energy return (74.51%) in comparison to the spring (78.56%) and conventional (78.52%) footwear. As running economy was improved and carbohydrate utilization reduced in the energy return footwear, this study indicates that they may be associated with improvements in running performance.
    Źródło:
    Central European Journal of Sport Sciences and Medicine; 2016, 16, 4; 77-84
    2300-9705
    2353-2807
    Pojawia się w:
    Central European Journal of Sport Sciences and Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical investigation of vanadium oxide film with surface microstructure
    Autorzy:
    Hong, W.
    Wang, Z.
    Chen, Q.
    Sheng, C.
    Gu, G.
    Luo, P.
    Xie, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/174416.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    vanadium oxide
    VO2
    film
    surface microstructure
    photonic band edge
    dispersion material
    Opis:
    This paper presents a method to design a surface microstructure of vanadium oxide to enhance optical absorption. This method, using a density of eigenfrequency, can be calculated by a planar wave expand method, to indicate the absorption efficiency of a dispersion material, which can be used as an approach method for further design. Based on this, a nanostructure-based vanadium oxide film is designed and simulated to validate this method. The simulation results show that the tendency of density of eigenfrequency is corresponding to the tendency of optical absorption enhancement. Moreover, this structure can achieve high optical broadband absorption when the material dispersion is considered. High optical absorption enhancement can be achieved by adjusting the geometrical parameters; our maximum overall enhancement absorption ratio was 31.84% at the metal phase, which can be attributed to the enhancement effect of a photonic band edge.
    Źródło:
    Optica Applicata; 2017, 47, 4; 601-609
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cardiopulmonary exercise tests of adolescent elite sport climbers – a comparison of the German junior national team in sport climbing and Nordic skiing
    Autorzy:
    Schöffl, Isabelle
    Wüstenfeld, Jan
    Jones, Gareth
    Dittrich, Sven
    Lutter, Chris
    Schöffl, Volker
    Powiązania:
    https://bibliotekanauki.pl/articles/2098221.pdf
    Data publikacji:
    2021-02-25
    Wydawca:
    Państwowa Wyższa Szkoła Zawodowa w Tarnowie
    Tematy:
    cardiopulmonary exercise testing
    adolescent athlete
    VO2peak
    cardiopulmonary capacity in climbing
    Opis:
    Introduction: All the research investigating the cardiopulmonary capacity in climbers is focused on predictors for climbing performance. The effects of climbing on the cardiovascular system in adolescents climbing at an elite level (national team) have not been evaluated.Material and methods: Retrospective analysis of the cardiopulmonary exercise test (CPET) performed on a cycle ergometer during the annual medical examination of the entire German Junior National climbing team on one occasion and for a selected subgroup on two occasions spaced two years apart. The data from the subgroup was compared to an age- and gender-matched control of Nordic skiers from the German Junior National Nordic skiing team.Results: 47 climbers (20 girls, 27 boys) were examined once. The VO2peak achieved by the athletes was 41.3 mL kg−1 min−1 (boys) and 39.8 mL kg−1 min−1 (girls). 8 boys and 6 girls were tested twice over a period of 27.5 months. The parameters of the exercise test measured on both occasions were significantly lower than those of the 8 male and 6 female Nordic skiers. There was no change with respect to any variables (e.g. VO2peak, peak work load, peak heart rate, peak lactate or O2 pulse) over the examined period.Conclusions: The elite climbers investigated in this study showed comparable VO2peak values to athletes from team and combat sports. The Nordic skiers to which they were compared showed significantly higher values consistant with the fact that this is an endurance sport. Even though the cardiopulmonary measurements of the Nordic skiers still improved after two years of training, no adaptations could be observed in the elite climbers.
    Źródło:
    Health Promotion & Physical Activity; 2021, 14, 1; 1-8
    2544-9117
    Pojawia się w:
    Health Promotion & Physical Activity
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The relationship between field test results measuring physical fitness levels in olympic boxing competitors and their athletic performance
    Związek pomiędzy wynikami polowych testów wydolności fizycznej u zawodników boksu olimpijskiego a wynikiem sportowym
    Autorzy:
    Kowalik, Norbert
    Powiązania:
    https://bibliotekanauki.pl/articles/2152257.pdf
    Data publikacji:
    2021-12-17
    Wydawca:
    Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica
    Tematy:
    boxing
    team
    physical capacity
    VO2max
    results in sport
    boks
    kadra
    wydolność fizyczna
    wyniki sportowe
    Opis:
    Background. The aim of the study was to find physical discriminants in Polish senior league elite boxers Material and methods. 13 competitors from the senior national team of average age and body mass participated in the study. The applied methods of assessment included FMS and CMJ tests, 3kg medicine ball throw and 1200m shuttle run. Results. Statistical analysis of the studied biomechanical variables compared with the results of the Polish Senior Championships and the yearly rank list did not reveal any significant correlation. Conclusions. The lack of a clear physical indicator may indicate that the determinants of success in sports depend on other competitors’ traits. On the other hand, the small sample size may be the reason of the lack of statistical significance. An adequate level of physical capacities may allow effective use of the athlete’s vast potential, however, it is not the only decisive factor affecting success in boxing.
    Wstęp. W pracy poszukiwano fizycznych wyróżników jakimi charakteryzowali się najbardziej utytułowani zawodnicy polskiej kadry narodowej seniorów. Materiał i metody. 13 zawodników kadry narodowej seniorów w średnim wieku i masie ciała. Wykonano test FMS, CMJ, rzut piłką lekarską 3 kg, bieg wahadłowy 1200 m. Wyniki. Analiza statystyczna badanych zmiennych biomechanicznych oraz wyników podczas Mistrzostw Polski Seniorów oraz roczną listą rankingową nie wykazała istotnej zależności. Wnioski. Brak jednoznacznego fizycznego wskaźnika może świadczyć, iż determinantów sukcesu sportowego należy szukać także w innych cechach zawodnika. Z drugiej strony niewielka liczebność próbki odpowiada za brak istotności statystycznej. Odpowiedni poziom zdolności fizycznych może pozwolić na efektywne wykorzystanie szerokiego potencjału sportowca, ale nie jest jedynym i decydującym czynnikiem wpływającym na sukces w boksie.
    Źródło:
    Polish Journal of Sports Medicine; 2021, 37(4); 217-222
    1232-406X
    2084-431X
    Pojawia się w:
    Polish Journal of Sports Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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