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Tytuł:
Heart rate variability – clinical significance87
Autorzy:
Urbanik, Dominika
Podgórski, Maciej
Mazur, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/551741.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Przyjaciół Medycyny Rodzinnej i Lekarzy Rodzinnych
Tematy:
heart rate
autonomic dysfunction
cardiovascular risk.
Źródło:
Family Medicine & Primary Care Review; 2018, 1; 87-90
1734-3402
Pojawia się w:
Family Medicine & Primary Care Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie elektromechanicznej folii EMFi do pomiaru tętna
Heart rate measurement using EMFi sensors
Autorzy:
Sondej, T.
Różanowski, K.
Dziuda, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/155338.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
pomiar tętna
balistokardiografia
sygnał EKG
pomiar bezkontaktowy
EMFi
heart rate
ballistocardiography
BCG
ECG
non-contact measurement
Opis:
W artykule przedstawiono sposób użycia elektromechanicznej folii EMFi do pomiaru częstości skurczów serca człowieka. Stanowisko pomiarowe składa się z dwóch sensorów EMFi, umieszczonych na typowym krześle biurowym, modułu referencyjnego do pomiaru EKG i SpO2 oraz karty DAQ. Wyznaczono wartość tętna dla sygnału EMFi i EKG. Błąd pomiaru tego parametru określony z serii pomiarów wykonanych w czasie 1 minuty i szacowany jako różnica między sygnałem pochodzącym z EMFi a sygnałem EKG wynosi < 1 %.
The Electro-Mechanical Film (EMFi) sensor for measurement of the human heart rate is presented. EMFi material is used to non-invasive technique for the assessment of the cardiac function called ballistocardiography (BCG). Construction and sensor operation are shown in Fig. 2. There was built a measurement setup from a typical office chair with ECG and SpO2 reference module (Fig. 4) for obtaining the ballistocardiogram . The EMFi signals from a subject sitting on the chair are recorded by a specially-designed amplifiers, analog filters and dedicated data acquisition card. A Matlab PC software was used for recording, data processing and displaying the results. EMFi sensors were mounted on the chair seat and backrest. The example signals are shown in Figs. 5, 6. The authors' method was evaluated by comparing the beat-to-beat heart rate (HRBB) values obtained from the EMFi sensors with the accurate reference values calculated from the reference ECG signal. The experimental results (calculated heart rate) are presented in Figs. 9, 10. The measurement error for the HRBB parameter, estimated as a difference between the EMFi and reference signal, is below 1 %, during 60-second recording.
Źródło:
Pomiary Automatyka Kontrola; 2012, R. 58, nr 3, 3; 264-267
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heart-rate Monitoring System Design and Analysis Using a Nios II Soft-core Processor
Autorzy:
Lim, C. K.
Jambek, A.B.
Hashim, U.
Powiązania:
https://bibliotekanauki.pl/articles/226033.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
pulse sensor
PPG
heart rate
FPGA
Nios II
Opis:
The heart rate of a person is able to tell whether they are healthy. A heart-rate monitoring device is able to measure or record the heart rate of a person in real time, whether it is an electrocardiogram (ECG) or a photoplethysmogram (PPG). In this work, a microprocessor system loaded with a heart-rate monitoring algorithm is implemented. The microprocessor system is the Nios II processor system, which interfaces with an analogue-to-digital converter (ADC) and a pulse sensor. A beat-finding algorithm is used in the microprocessor system for heart rate measurement. An experiment is carried out to analyse the functionality of the microprocessor system loaded with the algorithm. The results show that the detected heart rate is in the range of the average human being’s heart rate. The signal flow within the microprocessor system is observed and analysed using SignalTap II from Quartus’ software. Based on a power analysis report, the proposed microprocessor system has a total power dissipation of around 218.26 mW.
Źródło:
International Journal of Electronics and Telecommunications; 2016, 62, 3; 283-288
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Circadian Rhythm of Heart Rate, Urinary Cortisol Excretion, and Sleep in Civil Air Traffic Controllers
Autorzy:
Zużewicz, K.
Kwarecki, K.
Waterhouse, J.
Powiązania:
https://bibliotekanauki.pl/articles/90437.pdf
Data publikacji:
2000
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
heart rate
cortisol
sleep disorders
circadian rhythm
shift work
tętno
zaburzenia snu
praca zmianowa
Opis:
The examination of Air Traffic Controllers (ATCs) from the Warsaw Airport (Poland) included 24-hr ECG monitoring. The participants were 10 civil ATCs, 9 males and 1 woman. The study was carried out on a group of 19 ATCs during their duty periods, 14 of them working 12-hr shifts and 5 performing 24-hr duties. The participants collected urine every 4 hrs, and cortisol concentration was determined. Further, the survey included the quality and duration of sleep, and subjective fatigue in the 62 participants. In ATCs, shift work modifies natural rhythms of the circulatory system and decreases the ability for intensified mental work at night. In consequence ATCs experience frequent sleep disorders.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2000, 6, 3; 383-392
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tętno jako wskaźnik obciążenia pracą w fermie krów mlecznych
The heart rate as the index of workload in the dairy farm
Autorzy:
Groborz, A.
Juliszewski, T.
Powiązania:
https://bibliotekanauki.pl/articles/286462.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
tętno
ergonomia
wskaźnik
rezerwa tętna
heart rate
ergonomics
heart rate reserve
Opis:
W artykule przedstawiono analizę tętna podczas pracy personelu, zatrudnionego w oborze krów mlecznych. Badaniami objęto 15 osób, pracujących w jednym gospodarstwie województwa śląskiego. Na podstawie pomiarów tętna określono wskaźnik wykorzystania rezerwy tętna.
In the article is showed the heart rate analysis during work of personnel employing in the dairy farm. Research included 15 persons, which was working in one farm of Silesian Province. On the basis of the heart rate measurements was characterized the heart rate reserve index.
Źródło:
Inżynieria Rolnicza; 2005, R. 9, nr 10, 10; 107-115
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza możliwości wykorzystania aparatury pomiarowej i programu komputerowego firmy POLAR do rejestracji tętna
Feasibility study of POLAR metods and computer program to heart rate meausurement
Autorzy:
Groborz, A.
Juliszewski, T.
Powiązania:
https://bibliotekanauki.pl/articles/288118.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Inżynierii Rolniczej
Tematy:
ergonomia
tętno
wskaźnik wykorzystania rezerwy tętna
ergonomics
heart rate
heart rate reserve index
Opis:
Tętno jest najłatwiejszym do zmierzenia i zarejestrowania wskaźnikiem reakcji układu krążenia na wysiłek (głównie fizyczny). Spośród metod pomiaru i rejestracji tętna powszechnie stosuje się obecnie bezprzewodowe mierniki. Zaletą tych mierników - np. firmy POLAR - jest łatwość obsługi. Miernik, składający się z dwóch elementów: opaski zakładanej na klatkę piersiową i zegarowego rejestratora na nadgarstku, nie przeszkadza w wykonywaniu pracy. Zarejestrowane wyniki przenoszone są przy pomocy interfejsu do komputera, gdzie mogą być wizualizowane w postaci wykresów czasowych oraz analizowane statystycznie. Programowanie rejestratora oraz różnorakie opcje analizy statystycznej tętna, umożliwiają ocenę wysiłku podczas pracy. Metoda ta wykorzystywana jest od kilku lat do ergonomicznych badań prowadzonych na Wydziale Agroinżynierii Akademii Rolniczej w Krakowie.
Heart rate is the index of a reaction of the circulatory system to effort (mainly physical), which is the easiest to measure and record. From among methods of heart rate measurement and record, cordless meters are commonly applied nowadays. One of the advantages of these meters - for example POLAR - that they are easy to use. The meter consists of two elements: chest band and wrist recorder, which do not interfere with work. The recorded results are transferred by interface to a computer, where they could be presented in the form of time charts, and analyzed statistically. The programming of the recorder and various options of the statistic analysis of heart rate enable researchers to evaluate physical effort during work. That method has been used for a few years in ergonomic research led by the Faculty of Agricultural Engineering at the Agricultural University of Krakow.
Źródło:
Inżynieria Rolnicza; 2005, R. 9, nr 14, 14; 109-117
1429-7264
Pojawia się w:
Inżynieria Rolnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Validation of automated detection of physical and mental stress during work in a Huhnermobil 225
Autorzy:
Quendler, Elisabeth
Trieb, Katharina
Nimmerichter, Alfred
Powiązania:
https://bibliotekanauki.pl/articles/989872.pdf
Data publikacji:
2017
Wydawca:
Instytut Medycyny Wsi
Tematy:
workload
heart rate
stress
Opis:
Introduction. The effects of the use of mobile henhouses and their equipment on the physical and mental stress of farmers in the organic egg production, and the reliability of the sensor-based detection of these in work processes are insufficiently known. There are neither measurement results nor key figures, according to operation and gender especially, available in the literature. Objective. The aim of this case study is to quantify the physical and mental stress of work processes on the basis of heart rate and the Baevsky Stress Index, as measured by the ECG- and activity sensor Movisens®, which is used mainly in the sports and rehabilitation sectors. To analyse the impact, daily routine work was divided into operations and the data collected for this purpose analysed descriptively and analytically. Conclusions. In summary, it can be concluded that measurement technology has the potential to capture the activityrelated exceedances of the endurance limit of the work severity by means of the heart rate reliably, to identify risk areas of employment and to quantify stress situations. The accuracy and reliability of data acquisition with Movisens® should be validated by a larger sample size and further measurements. In particular, the algorithm for calculating the data to quantify the mental and physical stress without movement needs to be improved significantly through further development.
Źródło:
Annals of Agricultural and Environmental Medicine; 2017, 24, 2
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The pattern of psychophysiological response to emotional stimulation in patients with chronic stuttering
Autorzy:
Humeniuk, Ewa
Tarkowski, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/2106009.pdf
Data publikacji:
2020-03-11
Wydawca:
Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica
Tematy:
speech
emotions
anxiety
heart rate
Opis:
The aim of the research was to identify the pattern of psycho - physiological response to emotional stimulation in adults with chronic stuttering. The need to tell a lie functioned as emotional stimulation. Reaction to the stimulus was defined as the change of electrodermal activity (EDA), heart rate (HR), thoracic breathing (TB), diaphragmatic breathing (DB) and respiratory rate (RR) observed 10 seconds before and after the emotional stimulation. Reactions were recorded using Professional Computer Polygraph PIK-02 manufactured by Areopag-Center. The subject group included 68 persons with chronic stuttering (PWS) (24 women and 44 men) as well as 62 healthy nonstuttering persons (PWNS) (18 women and 44 men). Adult patients with chronic stuttering were observed to increase the amplitude and reaction field as well as reduce the EDA latency. The researchers also noticed both increased HR and the range of its changes. Respiratory reactions included a lower amplitude of TB, higher increase and major changes within DB as well as minor changes in RR. Adult patients with chronic stuttering display a unique pattern of psychophysiological response to emotional stimulation, which is different from the one found in the control group.
Źródło:
Acta Neuropsychologica; 2020, 18(1); 45-66
1730-7503
2084-4298
Pojawia się w:
Acta Neuropsychologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensitivity and specificity of using exercise heart rate in a thermoneutral environment to predict heat tolerance status
Autorzy:
Northway, Sarah
Jones, Douglas
Buono, Michael
Powiązania:
https://bibliotekanauki.pl/articles/2203015.pdf
Data publikacji:
2023-05-23
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
exercise
heat
heart rate
heat intolerance
heat tolerance testing
return to activity
Opis:
Objectives Following heat illness, a return to activity may require passing a heat tolerance test (HTT). However, there are several logistical limitations to the widespread use of the HTT. Thus, it would be advantageous to develop a test that could be conducted in a thermoneutral (~22°C) environment to predict heat tolerance status. The purpose of the current study was to determine the sensitivity and specificity of using the criteria of a heart rate (HR) ≥130 bpm following 30 min of thermoneutral exercise in detecting heat-intolerant and heat-tolerant individuals. Material and Methods Sixty-five subjects visited the lab on 3 separate days. The first visit consisted of completing a maximal oxygen uptake (VO2 max) test to assess cardiovascular fitness. For lab visits 2 and 3, subjects randomly completed a 2-hour walking treadmill test in either a hot (40°C, 40% relative humidity [RH]) or thermoneutral (22°C, 40% RH) environment. Results Forty-eight subjects were classified as heat-intolerant and seventeen subjects as heat-tolerant. Using the criterion of a HR ≥130 bpm at 30 min of exercise in the thermoneutral environment, specificity (54%) and sensitivity (100%) of passing the HTT was calculated. Secondary analysis using multiple regression revealed 3 significant variables for predicting ending HR during the HTT. They were: 1) absolute VO2 max (l/min), 2) age, and 3) HR at 30 min of exercise during thermoneutral exercise. Conclusions Exercise in a thermoneutral environment had a positive predictive value of 100%, thus, if a subject has a HR ≥130 bpm at 30 min of exercise in a thermoneutral environment, they are very likely to fail a subsequent 2-hour HTT in the heat and be classified as heat-intolerant. Therefore, prior screening has the potential to save time and money, along with providing safety to a heat-intolerant subject.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2023, 36, 2; 192-200
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect evaluation of physical education experimental program for physical rehabilitation groups using callanetics on progress level of students cardiovascular system with II-III degree of scoliosis
Autorzy:
Dubchuk, O.
Powiązania:
https://bibliotekanauki.pl/articles/2052242.pdf
Data publikacji:
2014
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
heart rate
blood pressure
students
scoliosis
Opis:
Nowadays there is a tendency of deterioration in young people health. Despite sharp rise in disease level of students there are no changes in current program of physical education for students of higher educational institution; it is significant problem of physical culture and sport field. It is also worth noting there is no special educational program for students who are referred to physical rehabilitation groups because of their health condition. So in the face of the deterioration of students' health condition there appears a need to search the effective methods of physical education which can facilitate the solving of an actual problem. The objective of research is determination of the effectiveness of Callanetics experimentally during educational process of students of the II-III level of scoliosis. For achieving this goal there were used the following methods of research: theoretical analysis and synthesis; testing of functional indicators of cardiovascular system (heart rate and blood pressure - systolic, diastolic and pulse); statistical data processing. The analysis of results gives evidence about effectiveness of physical educational experimental program using callanetics for physical rehabilitation groups with students of the II-III level of scoliosis. It is proved that this program has had a significant impact on the functional indicators of the cardiovascular system, it is also defined as the criterion of fitness level and adaptation abilities of an organism. The results can be used in further practice of physical education classes with groups of physical rehabilitation faculty.
Źródło:
Health Problems of Civilization; 2014, 08, 2; 35-39
2353-6942
2354-0265
Pojawia się w:
Health Problems of Civilization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physiological and biochemical parameters among a population of bakers exposed to environmental heat
Autorzy:
Al-Otaibi, Sultan T.
Powiązania:
https://bibliotekanauki.pl/articles/2084914.pdf
Data publikacji:
2022-06-08
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
physiological
parameters
heart rate
biochemical
bakers
heat
Opis:
ObjectivesThe aim of this study was to determine the physiological and biochemical changes among bakers, induced by heat exposure at the workplace.Material and MethodsInformation was collected by means of a self-administered questionnaire. Vital signs were measured and recorded by a trained nurse before and after each work shift. A venous blood sample was drawn at the end of each work shift. The mean wet-bulb globe temperature (WBGT) index in the bakeries and offices was measured.ResultsThis was a cross-sectional study involving 137 bakers working in 20 bakeries, and 107 control subjects comparable in terms of age, race, marital status, years of service, income, and cigarette smoking. There was a significant weight loss and increase in the respiratory rate, the heart rate, and oral body temperature among the bakers compared to the control group. Sodium levels were significantly lower, while blood urea nitrogen levels were significantly higher, among the bakers than in the control group. There were unfavorably hot working conditions in the bakeries: the WBGT index in the bakeries was 37.4°C while the average WBGT for the offices was 25.5°C.ConclusionsThe changes in the physiological and biochemical parameters among the bakers were found to be associated with exposure to high environmental heat in the bakeries, as judged by the WBGT index. Preventive measures should be aimed at reducing the adverse effects of heat exposure among bakers and should be directed towards the man-machine-environment triad.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2022, 35, 3; 265-272
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Does body posture during tree felling influence the physiological load of a chainsaw operator?
Autorzy:
Grzywiński, Witold
Jelonek, Tomasz
Tomczak, Arkadiusz
Jakubowski, Marcin
Bembenek, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/990840.pdf
Data publikacji:
2017
Wydawca:
Instytut Medycyny Wsi
Tematy:
working posture
heart rate
forestry
feller
felling
Opis:
Introduction and Objectives. Holding determined body postures during work is connected with muscles activity. The more forced the posture, the larger the number of muscles taking an active part in holding and stabilizing the work posture. During logging, the greatest share of awkward (forced) working postures occurs in tree felling by chainsaw. Materials and Method. A group of 10 experienced fellers aged 47.5±7.3 (37 – 59-years-old) was studied. Heart rate (HR) was measured during simulation of felling activity in 4 working postures: back bent forward with straight legs (stoop), back bent forward with bent legs (flexed-stoop), squat and kneeling on one knee (half-kneel). Results. The lowest value of HR was noticed for squatting – 114.1 bpm, then for kneeling on one knee – 116.3 bpm. HR during felling in a standing posture with straight legs amounted to 121.5 bpm and for standing with bent legs 125.3 bpm. For all studied postures the differences in average HR values were statistically significant at p<0.01. Conclusions. A working posture during tree felling by chainsaw has influence on the level of physiological workload of an operator. Standing bent forward body postures cause higher heart response than squatting and half-kneeling.
Źródło:
Annals of Agricultural and Environmental Medicine; 2017, 24, 3
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in the Blood Pressure, Heart Rate and Body Mass of Physically Active Men in Response to Thermal Stress
Autorzy:
Podstawski, Robert
Bielec, Grzegorz
Borysławski, Krzysztof
Alföldi, Zoltán
Marzec, Arkadiusz
Powiązania:
https://bibliotekanauki.pl/articles/2026889.pdf
Data publikacji:
2022-03-31
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
dry sauna
blood pressure
heart rate
body mass loss
physical activity
Opis:
Background: Finnish sauna is presently the most popular type of thermal therapy in Europe. Saunas are widely available in aquaparks, SPA centers and hotels. In Scandinavian countries sauna is regarded not only as a form of treatment, but as a part of the national lifestyle. Objective: The aim of this study was to evaluate sauna-induced changes in systolic (SBP) and diastolic blood pressure (DBP), heart rate (HR) and body mass in healthy men. Methods: Thirty healthy men aged 20-49 years (mean age: 31.2±11.3 years) attended four 12-minute Finnish sauna sessions (temperature: 90°C, humidity: 14-16%) with 6-minute breaks in between sessions, including cold water immersion for 1 minute. The participants’ physical activity (PA) levels were evaluated with an IPAQ questionnaire. Sauna bathers’ body composition, BP and HR were measured before the first and after the fourth sauna session. Results: A significant (p < .001) decrease in SBP and DBP values was noted in response to sauna regardless of the bathers’ body mass, age and PA levels. The average HR increased significantly in younger, slimmer and more physically active participants. Sauna treatment induced a significant decrease in body mass loss regardless of all independent variables. Conclusions: Repeated 12-minute Finnish sauna sessions have a beneficial influence on the cardiovascular system. Finnish sauna can be recommended for healthy men with average and high PA levels as a means of decreasing BP. Body mass loss, on the other hand, is related to the loss of body fluids as a result of sweating.
Źródło:
Central European Journal of Sport Sciences and Medicine; 2022, 37; 65-76
2300-9705
2353-2807
Pojawia się w:
Central European Journal of Sport Sciences and Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Conconi Test - Searching for the Deflection Point
Autorzy:
Hnizdil, Jan
Skopek, Martin
Nosek, Martin
Louka, Oto
Musalek, Martin
Heller, Jan
Powiązania:
https://bibliotekanauki.pl/articles/1922199.pdf
Data publikacji:
2019-08-07
Wydawca:
PPHU Projack Jacek Wąsik
Tematy:
anaerobic threshold
heart deflection point
heart rate
Opis:
The Conconi Test (CT) is an incremental exercise test characterized by stages of equal intensity. For analysis speed (S) and HR (heart rate) are used. The deflection point of the HR/S graph marks the point where the linear relation between S and HR changes to a curvilinear one. As Conconi stated HR at deflection point represents anaerobic threshold (AT) value. Purpose of this study was to extend our previous research dealing with reliability and validity aspects of CT. Material and Methods: During 10 years (2007-2017) we tested 2 500 subjects using Conconi protocol. Tested were mainly football players and smaller number of runners (long distance and cross country) different ages and fitness level. Some subjects were tested repeatedly during the years. Initial speed of the running treadmill test was determined in the range of 10 to 12 km·h-1, according subjects age and fitness level. Speed was increased gradually every 150 m of 0.5 km·h-1 to the maximum speed when further increases were impossible. HR was recorded at every 150 meters. From a graphical representation dependence HR on increasing running speed we tried to find apparent diversion from the curve of linearity, labeled by Conconi as "deflection point" (DP). Simultaneously respiration values were recorded. From these respiration data we determined the ventilatory threshold (VT2) as a metabolic marker of the onset of blood lactate accumulation. Results: We found 6 types of response HR to increasing speed. a) regular DP; b) linear regression r ≥ 0.98 - no DP; c) linear regression r < 0.98 - no DP; d) inversion character of deflection point; e) DP not corresponding with value of ANP; f) more than one DP. As an AT predictor compared with VT2, Conconi test overestimated this value (0.5 km·h-1). Conclusion: Using of Conconi test as a predictor of ANP has a limitation. ANP values determined by CT are overestimated (0.5 km·h-1). Test stability of CT is very low and there is evidence that DP is not 100% repeated physiology phenomena.
Źródło:
Physical Activity Review; 2019, 7; 160-167
2300-5076
Pojawia się w:
Physical Activity Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physiological workload of workers employed during motor-manual timber harvesting in young alder stands in different seasons
Autorzy:
Grzywiński, Witold
Turowski, Rafał
Jelonek, Tomasz
Tomczak, Arkadiusz
Powiązania:
https://bibliotekanauki.pl/articles/2085735.pdf
Data publikacji:
2022-08-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
forestry
heart rate
energy expenditure
logging
winter
summer
Opis:
ObjectivesThis study examined the physiological strain experienced by workers employed in motor-manual timber harvesting performed in winter and summer, and the applicability of heart rate indices for estimating energy expenditure.Material and MethodsThe heart rates (HR) of 2 teams consisting of 2 persons working simultaneously during felling and forwarding, in both winter and summer, were measured. Heart rate at work (HRwork), resting heart rate (HRrest), relative heart rate (%HRR), ratio of working heart rate to resting heart rate, and 50% level were used to estimate the physiological workload in particular jobs. The HRindex (HRwork/HRrest) equation was used to estimate the energy expenditure (EE). ResultsFor all jobs, significantly higher physiological workload and energy expenditure were recorded during winter.ConclusionsThe season significantly affects the physiological workload during logging operations. If there is no possibility of harvesting wood in summer, in order to limit the workload of workers during winter activity, attention should be paid to the proper organization of work and selection of workers.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2022, 35, 4; 437-447
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 51

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