Wyniki wyszukiwania - Biblioteka Nauki

1

Acute Effects of Whole Body Vibration on Shoulder Muscular Strength and Joint Position Sense

100%

Hong J. , Velez M. , Moland A. , Sullivan J.

Journal of Human Kinetics

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2010

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tom 25

17-25

EN

Functional changes following whole body vibration (WBV) training have been attributed to adaptations in the neuromuscular system. However, these changes have mainly been observed in the lower extremity with minimal change to the upper extremity. The purpose of the study is to examine the acute effect of shoulder vibration on joint position sense and selected muscle performance characteristics (peak torque, time to peak torque, and power). Forty young individuals (19.84 ± 1.73 yrs, 171.41 ± 7.73 cm, 70.07 ± 9.32 kg) with no history of upper body injuries were randomly assigned to an experimental (Vibration) or control (No-Vibration) group. To assess shoulder proprioception, active and passive joint position senses were measured on both internal and external rotation of the shoulder. The muscle performance variables (peak torque and time to peak torque) were measured using isokinetic dynamometer with the velocity of 60°/sec. After three bouts of 1 minute vibration training, the experimental group demonstrated a significant improvement in the internal rotation peak torque, time to peak torque and external rotation time to peak torque (p<0.05). However, no-significant differences were revealed for joint position sense, external rotation peak torque, and time to peak torque between the groups. Our findings suggest that short bouts of vibration treatment have a significant effect on shoulder muscle characteristics.

2

The Long Lasting Effects of Whole Body Rotation Vibration in a Fitness Exercise Program on Flexibility and Motor Coordination in Young Females

100%

Tomasz T. , Maria Agnieszka N. , Mariusz Z. , Ludmila J. M. , Viktor S. M. , Stanisław S.

Baltic Journal of Health and Physical Activity

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2012

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tom 4

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nr 4

221-230

EN

Background: The aim of the study was to determine additional effects of 8 weeks’ whole body rotation vibration combined with a fitness exercise program of health-related training on chosen motor coordination abilities and flexibility in young females. Material/Methods: Thirty-seven young females aged 20-25 (students) voluntarily participated in the study. The training program included 24 training sessions which were performed over the course of 8 weeks (3 sessions a week) and was based on basic principles of health-related protocols. The program of sessions was performed by subjects of the experimental group with a working whole body vibration platform (20 Hz), whereas those of the control group performed the same exercises with a non-working (placebo) vibration platform. Chosen motor coordination abilities (body balance, reproducing of strength and whole body rotation angle) and flexibility (active and passive) were measured at the 4th and the 8th week. Results: This study showed additional effects of concomitant whole body vibration and physical exercises for 24 sessions of training (40-50 min). A significant increase in some values of the motor coordination ability (body balance, reproduction of strength and angle in rotation) and hip active and passive flexibility was shown in the experimental group vs. the control one. Conclusions: The results indicate that chronic rotation whole-body vibration, as an accompanying impact to a fitness exercise program, has additional positive effects on coordination and flexibility in young females.

3

The effect of short- and long-term vibration training on postural stability in men

88%

Piecha M. , Król P. , Juras G. , Sobota G. , Polak A. , Bacik B.

Acta of Bioengineering and Biomechanics

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2013

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tom Vol. 15, no. 3

29--35

EN

The study aimed to establish the short- and long-term effects of vibration on postural stability in young men. A single set of exercises and a 4-week vibration training were assessed for their impact on the center of foot pressure (COP) sway. The sample consisted of 49 male subjects randomly allocated to seven comparative groups, six of which exercised on a vibration platform whose parameters were set individually for the groups. Group VII was the control group. The stabilographic signal was recorded before the test commenced, after a single application of vibration, before the last set of exercises of the 4-week vibration training, immediately afterwards, as well as one week and one month after the training ended. The subjects were exposed to vibration 3 times a week for 4 weeks. Both a single application of vibration and the 4-week vibration training had an effect on all parameter values, but most changes were statistically insignificant. Group III was the only one where the COP sway in the anterior-posterior direction significantly increased after a single exposure to vibration and significantly decreased in both anterior-posterior and medio-lateral planes one week after vibration training compared with the pre-test recordings.

4

Effect of whole body vibration in energy expenditure and perceived exertion during intense squat exercise

75%

Bertucci W. , Arfaoui A. , Duc S. , Letellier T. , Brikci A.

Acta of Bioengineering and Biomechanics

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2015

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tom Vol. 17, no. 1

87--93

EN

Purpose: The purpose of this study was to investigate the effect of whole body vibration in oxygen uptake during intense squatting exercise with an added weight and whole body vibration compared with the same exercise without vibration. Methods: Nine male subjects performed three trials of dynamic squatting with an additional load of 50% of their body weight during 3 min. One trial without vibration, one trial with the frequency of 40 Hz and amplitude of 2 mm and one trial with the frequency of 40 Hz and amplitude of 4 mm. Results: The results showed no difference between the three experimental trials in relative and absolute oxygen uptake. However, the metabolic power and energy expended in whole body vibration (2 mm) were significantly different from exercise without vibration. The data analysis also showed a significant difference in rating of perceived exertion with whole body vibration (4 mm) compared with the exercise without vibration. Results showed that the addition of vibration stimulus has an increase in the energy expenditure particularly with 40 Hz and 2 mm amplitude, suggesting that the high metabolic power during heavy resistance training could be increased by the addition of vibration stimulation. Conclusions: Involuntary contractions generated by the vibration can be used by coaches to increase the intensity of heavy resistance training or to increase the energy expended during the workouts if the goal is a decrease of body mass.

5

Technical Solutions Enabling the Physical Training of Astronauts During Long-Term Stays at Space Stations

75%

Żyłka M. , Żyłka W. , Klukowski K.

Advances in Science and Technology. Research Journal

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2023

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tom Vol. 17, no 4

36--45

EN

This article describes problems related to the adaptation of the human body to the state of weightlessness. International studies on changes in the parameters of the musculoskeletal and cardiovascular systems are analysed. The paper also presents technical solutions in the form of numerous devices enabling human functioning in microgravity conditions, without significant decrease in physical capacity, as well as muscle and bone atrophy. The chief purpose of this paper is to propose an innovative piece of equipment that applies two pneumatic actuators for training of lower bodily parts of astronauts in a space station. The equipment recommended in the article is of the authors’ own patent. Additionally, the authors put forward a proposition of how to control the patented device in a novel way.

6

Porównawcza ocena termowizyjna kończyn dolnych po terapii PNF oraz treningu wibracyjnym u dziecka z przepukliną oponowo-rdzeniową

75%

Talar A. D. , Łukowicz M. , Zalewski P. , Dejewska I.

Acta Bio-Optica et Informatica Medica. Inżynieria Biomedyczna

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2008

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tom Vol. 14, nr 3

199-203

PL

WSTĘP. Przepuklina oponowo-rdzeniowa jest wielosegmentową, wrodzoną wadą kręgosłupa spowodowaną niedorozwojem kręgów w procesie tworzenia się struktur rdzenia kręgowego i kręgosłupa w trzecim tygodniu życia zarodkowego dziecka. Poniżej miejsca uszkodzenia dochodzi do zaniku funkcji neurologicznych, zatem stan i samodzielność dziecka uzależnione są od poziomu lokalizacji wady. W celu poprawy funkcji kończyn dolnych wykorzystuje się różne metody kinezyterapeutyczne, w tym metodę NDT-Bobath (Neuro Developmental Treatment) metodę Vojty, PNF (Proprioceptive Neuromuscular Facilitation) itp. Badany jest również wpływ treningu wibracyjnego na poprawę funkcji układu mięśniowo-więzadłowego, kości, poprawę krążenia, równowagi, skoczności. CEL. Celem badania była termowizyjna analiza porównawcza dwóch form terapii: funkcjonalnej metodą PNF i wibracyjnej w przypadku pacjentki z niedowładem wiotkim kończyn dolnych. MATERIAŁ I METODA. Badaniu poddano siedmioletnią dziewczynkę z przepukliną oponowo-rdzeniową w odcinku lędźwiowo-krzyżowym. Dokonano oceny termowizyjnej efektów terapii kończyn dolnych: po 4 tygodniach ćwiczeń wg koncepcji PNF i 4 tygodni treningu wibracyjnego na platformie Galileo 2000. Badania termowizyjne wykonano za pomocą kamery termowizyjnej P640 firmy FLIR SYSTEMS. WYNIKI. Uzyskano wzrost temperatury kończyn dolnych, zwłaszcza lewej, lepiej unerwionej w przypadku terapii wibracyjnej, nie obserwowano zmian lub stwierdzono spadek temperatury po terapii PNF. WNIOSKI. Terapia wibracyjna przyczyniła się do stymulacji mięśni kończyn dolnych, zwłaszcza lewej, u dziewczynki z niedowładem wiotkim w przebiegu przepukliny oponowo-rdzeniowej, nie obserwowano takich efektów po terapii PNF.

EN

INTRODUCTION. Myelomeningocele is a multUevel dysplasia of spine of embryonic phase origin. Depending on the level of lesion the neurological dysfunction appears which causes gait disturbances, weakness of muscles, less of sensation and neurological bladder. There are numerous kinesiotherapeutic methods introduced, i.a. PNF, NDT - Bobath, Vojta, to improve the functioning of the child. Recently the application of vibration therapy is evaluated as a treatment method of improving the muscular-ligament system, t)ones structures, improvement of blood circulation, balance and the strength. AIM. The aim of this paper was the thermovisual comparative analysis of two treatment methods: vibration and PNF therapy applied in case of the patient suffering from flaccid paraparesis. MATERIAL AND METHOD. 7 year old child with myelomeningocele was treated with vibration therapy on Galileo table; 5 days a week for 4 weeks. Then, 4-week PNF therapy was applied - 30 minutes a day. The measurements were taken in many points on the dorsal and ventral side of both legs. P640 camera (FLIR SYSTEMS) was used. RESULTS. The increase of temperature of the lower limbs was noticed (especially left, better innervated) as a result of vibration therapy. There were no changes observed or the decrease of temperature was notices in case of PNF therapy. CONCLUSIONS. Vibration therapy proved to be effective in children suffering from flaccid paraparesis after myelomeningocele. Such changes were not observed after PNF therapy application.

7

Preliminary assessment of vibration impacts generated by the public transport systems on pregnant women based on subjective reactions

63%

Kromka-Szydek M. , Dziechciowski Z. , Tyrpin P.

Acta of Bioengineering and Biomechanics

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2018

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tom Vol. 20, no. 1

79--92

EN

Research efforts summarised in this study were a part of preliminary investigation to evaluate the impact of pregnant women’s exposure to vibrations generated by public transport system when using. Methods: The assessment of the problem and discomfort for pregnant women, caused by the public transportation is based on a questionnaire including questions relating to the women’s subjective feelings on well-being or discomfort when exposed to vibration during the ride in passenger cars or when using means of public transport. In the second stage of investigation, vibrations transmitted onto a sitting person during the tram or car ride were measured. Results: The survey shows that when travelling on a tram the women complained mostly of digestive or neurological disorders, during the car ride they suffered most acutely from digestive disorders, sensed enhanced foetus movements and reported problems with the osteoarticular system. Amplitude-frequency characteristics of the investigated vehicle types reveal that vibration amplitudes registered during the ride in a motor vehicle are higher than on tram (in the analysed frequency range). Furthermore, vibration accelerations in the z-axis direction registered during the tram ride exceed the vibration discomfort threshold, particularly for the 1/3 octave bands 5 and 6.3 Hz. These are frequency ranges corresponding to resonance frequencies of vital organs in the abdominal cavity (4.5–10 Hz). Conclusions: Correlating these results with frequencies reported in literature associated with subjective human responses to vibration, shows that pregnant women using public transport are likely to suffer from a variety of ailments caused by vibrations generated during the ride.

8

Energy experimental method verification dynamical model of human under whole body vibration

63%

Grygorowicz M. , Dobry M. W. , Tabaszewski M.

Vibrations in Physical Systems

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2010

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tom Vol. 24

137--142

EN

The article presents energetic experimental method of verification dynamical model of human under whole body vibration. There are two phases of this method. Base of the first one is laboratory measurements of strength stimulation power and energy flow. Measurement is made in point of connection actuator and seat loaded sitting operator for slow turn of standard frequency band for whole body vibration. The second phase its digital simulation of power distribution and energy flow in biodynamical structure of physical model human seated also at this some frequency. Compare e.g. two energy flow curves into biodynamical structure of human body and energy dose, which passed in this time to man, allows to assess the correctness of the structure and dynamical parameters of physical models.

9

Effects of Manual Handling, Posture, and Whole Body Vibrations on Low-Back Pain

63%

Meyer J. P. , Flenghi D. , Deschamps J. P.

International Journal of Occupational Safety and Ergonomics

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1998

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tom Vol. 4, No. 4

449--470

EN

To determine the effect of occupational stress on low-back pain (LBP), a cross-sectional study has been carried out, by interviews, on workers exposed to 3 stresses: manual handling (MH, 82 women and 264 men), whole body vibrations (WBV, 274 men), and static postures (278 women). Anthropometric data, occupational stress, LBP severity and frequency, and a psychological evaluation of these groups were compared to those of a control population of 208 workers (104 men and 104 women). The results show that 30% of the population had never suffered from LBP. Age and the body mass index of the workers were the parameters most closely associated with LBP. Women involved in MH had higher frequency and severity of LBP than their reference population. Men involved in MH or exposed to WBV had higher frequency of painful episodes than their reference population. Workers exposed to one of the stresses were on sick leave for LBP more often, and for longer periods, than workers in the reference group. The results show that individual factors are often decisive in the onset of LBP. Nevertheless, in the more serious LBP cases, occupational stress is an aggravating factor for LBP and its consequences.

10

Dolegliwości bólowe w dolnej części kręgosłupa u rolników indywidualnych narażonych na działanie wibracji ogólnej

63%

Solecki L.

Medycyna Pracy

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2014

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tom 65

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nr 1

55-64

EN

Introduction: Work-related lower back disorders , which involve the lumbo-sacral region, as well as injuries of the lumbar section of the spine, are a serious and constantly growing problem in Europe. Whole body vibration is one of the major hazardous factors suspected of the development of back pain. Material and Methods: The study covered a selected group of males, 98 farmers (aged 55.3±10.1) from the area of 7 communes in the Lublin Region, engaged in the mixed agricultural production (plant-animal). The control group consisted of 40 academic workers (university and research institute employees) aged 48.9±9.6 years. A questionnaire concerning low back pain (in the lumbar region) designed by the researchers of the Institute of Rural Health in Lublin was used as a major research tool. The degree of farmers' exposure to whole body vibration was evaluated based on the parameter known as a cumulative vibration dose (d) (years×m2×s -4). Results: The measurements showed that the cumulative vibration dose for the selected group of farmers (98) remained within the range of 2.90-9.68 (years×m2×s -4), in the time interval between 15-50 years of work in conditions of exposure to vibration. The survey confirmed that private farmers exposed to whole body vibration considerably more frequently complained of back pain (92 farmers, 94% of the total number of respondents), than academic workers (control group not exposed to whole body vibration (25 researchers, 63%); p < 0.0001. Also the frequency of back pain in all the three time intervals of employment (15-25, 26-35, 36-50 years) is significantly higher in the group of farmers than in the control group (p < 0.05). Conclusions: The frequency of back pains experienced by farmers during the entire period of occupational activity increases with a growing dose of whole body vibration (p = 0.005). In the incidence of chronic pain an upward tendency was observed (statistically insignificant). Med Pr 2014;65(1):55–64

PL

Wstęp: Zarówno schorzenia, jak i urazy odcinka lędźwiowego kręgosłupa są w Europie znaczącym i wciąż rosnącym problemem. Jednym z istotnych czynników szkodliwych, sugerowanych jako przyczyna powstawania bólów pleców, jest wibracja ogólna. Materiał i metody: Badaniom została poddana wytypowana grupa mężczyzn - 98 rolników w wieku 55,3±10,1 roku z terenu 7 gmin w województwie lubelskim, zajmujących się mieszaną produkcją rolniczą (roślinno-zwierzęcą). Grupę porównawczą stanowili pracownicy umysłowi - 40 osób w wieku 48,9±9,6 roku. Podstawowym narzędziem badawczym była ankieta dotycząca dolegliwości bólowych występujących w dolnej części kręgosłupa (odcinek lędźwiowy). Stopień narażenia rolników na wibracje ogólne oceniano w oparciu o zastosowany parametr zwany skumulowaną stażową dawką drgań [lata×m2×s -4]. Wyniki: Przeprowadzone pomiary wykazały, że skumulowana stażowa dawka drgań (d) dla wybranej grupy badanych rolników (98 osób) mieści się w zakresie 2,90-9,68 (lata×m2×s -4) w przedziale lat pracy w narażeniu na wibrację: 15-50 lat. Badania ankietowe wykazały, że rolnicy indywidualni eksponowani na wibrację ogólną znacznie częściej skarżą się na bóle pleców (92 osoby, 94% ogółu badanych rolników) niż pracownicy z grupy porównawczej (25 osób, 63%) (p < 0,0001). Również częstość bólów pleców we wszystkich trzech przedziałach lat pracy (15-25 lat, 26-35 lat, 36-50 lat) jest statystycznie istotnie wyższa w grupie rolników niż w grupie porównawczej (p < 0,05). Wnioski: Wraz ze wzrostem wchłanianej dawki drgań ogólnych wzrasta częstość odczuwanych bólów pleców u rolników w okresie całego życia zawodowego (p = 0,005). W przypadku występowania bólów przewlekłych obserwowano trend wzrostowy (nieistotny statystycznie). Med. Pr. 2014;65(1):55–64

11

Assessment of annual exposure of private farmers to whole body mechanical vibration on selected family farms of plant production profile

51%

Solecki L.

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tom 17

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nr 2

243-250

12

The vibration energy absorption of tractor operator exposed to vertical whole-body vibration under work of the aggregate tractor-round baler

51%

Kromulski J. , Szczepaniak J. , Gajek D. , Mac J. , Wojciechowski J. , Zawada M.

Journal of Research and Applications in Agricultural Engineering

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2020

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tom Vol. 65, nr 1

14--20

EN

Humans are most sensitive to whole body vibration (WBV) within the frequency range of 1 to 20 Hz. Whole-body vibration can cause fatigue, stomach problems, headache. After daily exposure over a number of years, whole-body vibration can affect the entire body and result in a number of health disorders. Workers driving tractors or other vehicles are especially at risk of being exposed to WBV. On the basis of the guidance provided in ISO 2631-1 to relate vibration exposure with the risks of health effects are established based on absorbed power. The 4-DOF dynamic model developed by Wan and Schimmels is recommended for the study of biodynamic responses of seated human subjects under vertical whole body vibration. This model of the human body is used to estimate the absorbed power distributed in head, upper torso, lower torso and thighs. The vibration energy (power) absorption of seated human that is exposed to vertical whole-body vibration are investigated under work of the aggregate tractor-round baler.

PL

Ludzie są najbardziej wrażliwi na drgania o działaniu ogólnym w zakresie częstotliwości od 1 do 20 Hz. Drgania o działaniu ogólnym mogą powodować zmęczenie, problemy żołądkowe, ból głowy. Po codziennej, wieloletniej, ekspozycji na drgania o oddziaływaniu ogólnym może zostać powstać szereg zaburzeń zdrowotnych. Pracownicy prowadzący ciągniki lub inne pojazdy są szczególnie narażeni na kontakt z drganiami o oddziaływaniu ogólnym. Na podstawie wytycznych zawartych w normie ISO 2631-1 istnieje powiązanie narażenia na wibracje z ryzykiem skutków zdrowotnych na podstawie pochłoniętej mocy drgań. Model biodynamiczny o czterech stopniach swobody 4-DOF opracowany przez Wana i Schimmelsa jest zalecany do badania reakcji siedzącego kierowcy na pionowe drgania o oddziaływaniu ogólnym. Model ten pozwala wyznaczyć pochłoniętą moc drgań w poszczególnych elementach ciała człowieka: głowa, górną część tułowia, dolną część tułowia oraz uda. Model ten zastosowano do badania absorpcji mocy drgań przez operatora agregatu ciągnik-prasa zwijająca

13

Preliminary recognition of whole body vibration risk in private farmers' working environment

51%

Solecki L.

Annals of Agricultural and Environmental Medicine

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2007

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tom 14

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nr 2

EN

The objective of the study was the preliminary recognition of whole body mechanical vibration risk among farmers in the rural work environment. The study covered 15 farms using cultivated land of the size of over 10 ha, carrying out mixed production (plant-animal), equipped with agricultural tractors, and a basic set of tractor-mounted agricultural machinery, with a partial contribution of self-propelled agricultural machines. The scope of the study covered the measurements of effective vibration RMS acceleration (equivalent, maximum, minimum, peak) frequency corrected on the seats of agricultural vehicles in the three spatial directions of vibration (X, Y, Z). These measurements were realized while performing various fi eld and transport work activities during the period of the whole year. A analysis of the peak, maximum and minimum vibration accelerations confi rms that in the agricultural occupational environment there occurs a considerable variation of the vibration values registered. This is also evidenced by high values of the Crest Factor, sometimes exceeding a score of 10. Analysis of the registered equivalent values of vibration acceleration (frequency corrected) from the hygienic aspect showed that vibration occurring on the seats may create risk for farmers’ health while performing such work activities as: tedding and raking of hay, fertilizers spreading, soil aggregation, grass mowing and cultivation. Analysis of the spatial distribution of the measured, frequency corrected vibration accelerations indicates that considerably the highest acceleration values occur in the vertical plane (direction – Z). Literature data clearly confi rm an unfavourable effect of whole body vibration present in agricultural vehicles on discomfort and the occurrence of back pain in the operators, especially in the low back region (lumbar spine), as well as degenerative changes in the spine.