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Wyszukujesz frazę "countermovement" wg kryterium: Temat


Wyświetlanie 1-8 z 8
Tytuł:
Public Capital and the Post-Communist Welfare State: The Case of Poland
Autorzy:
Rae, Gavin
Powiązania:
https://bibliotekanauki.pl/articles/1810832.pdf
Data publikacji:
2016-06-28
Wydawca:
Polskie Towarzystwo Socjologiczne
Tematy:
welfare state
post-communism
Polska
capital
Countermovement
Bourdieu
Polanyi
Opis:
This paper provides an overview of some of the main theories of the welfare state. It builds upon Polanyi’s theory of the double-movement and relates this to Bourdieu’s concept of multiple capitals. It argues that the welfare state can be understood as a form of public capital, both in an economic and sociological sense. The welfare state emerges and is maintained due to a social countermovement that at least partly removes areas of socio-economic life out of commodity relations. In turn this creates public capital, which is both economic and social. In the post-Communist countries most of this public capital was created during a period when almost the whole of economic and social life was controlled by the state. Once the Communist system collapsed, so the accompanying policy of full-employment and system of social welfare organised through state enterprises disappeared. This was met with a large rise in unemployment and labour deactivation, meaning that many social benefits were created during the initial years of the transition. Also, the post-Communist systems inherited large amounts of public capital in the form of public services such as health and education. Through the example of Poland this paper analyses how this public capital was initially maintained and even developed during the early transition period, but then how a process of commodifying it was later begun.
Źródło:
Polish Sociological Review; 2016, 194, 2; 155-170
1231-1413
2657-4276
Pojawia się w:
Polish Sociological Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Clinical implications of Squat Jump and Countermovement Jump among Young Females of United Arab Emirates : Comparative Biomechanical Analysis
Autorzy:
Saad Salama, Tasnim Yahia
Harb Abdelkawi Ali, Maryam Abdelkawi
Kandakurti, Praveen Kumar
Bose, Meruna
Muthukrishnan, Ramprasad
Hazari, Animesh
Powiązania:
https://bibliotekanauki.pl/articles/32443965.pdf
Data publikacji:
2024
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
squat jump
countermovement jump
young females
biomechanical analysis
United Arab Emirates
Opis:
Background: The countermovement jump (CMJ) and the squat jump (SJ) are two vertical jump (VJ) tests widely used to evaluate lower limb muscle strength and power, respectively. Biomechanical analysis of SJ and CMJ could help to predict the strength associated musculoskeletal clinical disorder which is most commonly seen among females such as patellofemoral pain syndrome, osteoarthritis etc. Therefore, the purpose of the study was to conduct and compare the biomechanical analysis of squat and countermovement jump using advanced motion analysis system and compare the changes among sedentary and active young females of the United Arab Emirates. Methodology: The experimental study was conducted at the Thumbay Physical Therapy and Rehabilitation Hospital, Gulf Medical University, Ajman, UAE. A total of 60 sedentary females, and 60 active females within age group 18-30 years were recruited under the convenience sampling method. The participants were randomly divided into two subgroups of 30 each for SJ and CMJ jump analysis respectively for sedentary and active group. Results: There was a statistically significant difference between the CMJ and SJ among the young females in UAE population (p < 0.05). The outcome variables such as jump height, and lower limb joint force were significantly reduced for SJ and CMJ in the sedentary group compared to active group. Majority of the variables showed moderate to severe effect size. Conclusion: Based on the study findings, it could be suggested that the “Sedentary Group” in the present study had poor muscle strength and ability to sustain the stress on the lower limb joints as also shown with lower mean total work. Since we have conducted the study on healthy non-athletes’ young females, the data could be used for further clinical correlation and comparison for lower limb muscle strength and power.
Źródło:
Central European Journal of Sport Sciences and Medicine; 2024, 45; 65-74
2300-9705
2353-2807
Pojawia się w:
Central European Journal of Sport Sciences and Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of selected biomechanical parameters in female team sports players
Autorzy:
Pietraszewski, B.
Struzik, A.
Powiązania:
https://bibliotekanauki.pl/articles/307048.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
countermovement jump
drop jump
RSI
torque
vertical jump
skoki
trening
biomechanika
Opis:
The aim of this research was to evaluate the biomechanical parameters of lower limbs and their influence on height of vertical jump. The research was conducted on a group of females practicing basketball and volleyball. The following equipment was used during the experiment: a force plate by Kistler, a Biometrics electrogoniometer and a specially designed chair to measure static torque by OPIW Opole. The results indicated that the jumping abilities of the examined athletes were poor. No statistically significant correlations were observed between knee static torque and heights of vertical jumps: CMJ and DJ. The authors suggest modification of the McClymont index (RSI) to evaluate the selection of platform height during plyometric training. Such modification would enable better choice of loads and better training control of the subject.
Źródło:
Acta of Bioengineering and Biomechanics; 2013, 15, 4; 103-108
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of potential elastic energy during the countermovement phase of a vertical jump based on the force-displacement curve
Autorzy:
Struzik, Artur
Zawadzki, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/306373.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
skoki
elastyczność
sztywność
rozciąganie
countermovement jump
elasticity
quasi-stiffness
stretch-shortening cycle
Opis:
Purpose: One inconvenience in finding experimental evidence for the relationship between potential elastic energy and vertical jump height is the difficulty of estimating the value of the stored potential elastic energy. Therefore, the aim of this study is to present a simple method of estimating the potential elastic energy stored by lowering the center of mass during the countermovement phase of a vertical jump. Methods: The research was conducted on 30 able-bodied male university students (age: 20 years, body height: 183.1 ± 7.9 cm, body mass: 80.3 ± 10.4 kg). Each participant performed 10 single countermovement jumps with arms akimbo to maximal height. Measurements employed a Kistler force plate. The value of potential elastic energy was estimated based on the curve of dependence of the ground reaction force on the vertical displacement of the jumper’s center of mass. Results: The mean value (±SD) of potential elastic energy collected due to lowering of the center of mass during the countermovement phase of a vertical jump was 183 ± 69 J. 24.3% of this value can be considered the part of the potential elastic energy (44 ± 21 J) that comes from the transformation of kinetic energy. The total change in gravitational potential energy due to lowering the center of mass was 240 ± 58 J. Conclusions: This estimation of potential elastic energy is only general and rough. However, certain estimations of potential elastic energy may offer some insight into the phenomenon relating vertical quasi-stiffness and the ability to store potential elastic energy with vertical jump height.
Źródło:
Acta of Bioengineering and Biomechanics; 2019, 21, 1; 153-160
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Path to a Countermovement? Forms of Integration in Polish Consumer Cooperatives
Autorzy:
Bilewicz, Aleksandra
Powiązania:
https://bibliotekanauki.pl/articles/1009356.pdf
Data publikacji:
2018-10-10
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
consumer cooperatives
embedded economy
forms of economic integration
reciprocity
countermovement
Karl Polanyi.
Opis:
This paper discusses Polish consumer cooperatives in terms of the embedded economy as understood by Karl Polanyi. The author compares today‟s “new” cooperatives, or informal groups of consumers that have been emerging in Poland since 2010, with the “old” consumer cooperative movement that existed between 1906 and 1939, as represented mainly by the “Społem” consumer cooperative union. Following Polanyi‟s understanding of the relationship between human economy and social institutions, I analyse reciprocity and redistribution as forms of economic integration in past and present cooperatives. Although the “new” cooperatives refer to the prewar cooperative traditions, their structure and economic operation differ vastly from the original model. I argue that the present structure of consumer cooperatives does not provide a base for symmetry and centricity – “supporting structures” for reciprocity and redistribution – although some of the new cooperatives do offer solutions for those deficits. This paper also discusses the nature of class barriers in the contemporary and historical consumer-cooperative movement, and relates this issue to Polanyian notions of countermovement and class interest.
Źródło:
Praktyka Teoretyczna; 2018, 27, 1; 133-167
2081-8130
Pojawia się w:
Praktyka Teoretyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lower extremity power in female soccer athletes : a pre-season and in-season comparison
Autorzy:
Pietraszewski, B.
Siemieński, A.
Bober, T.
Struzik, A.
Rutkowska-Kucharska, A.
Nosal, J.
Rokita, A.
Powiązania:
https://bibliotekanauki.pl/articles/307077.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
skoki
trening plyometryczny
energia
biomechanika
countermovement jump
drop jump
plyometric training
relative power
Opis:
Purpose: Lower extremity power is an important physical capacity of a soccer athlete. Power represents, and can be modified by, the training of strength and speed. Pre-season and in-season training differs in the relative emphasis on these two quantities. It is nevertheless desirable that the mechanical power remain the same or become higher during the in-season period. The purpose of this study was to identify changes in quantities related to “explosive strength” and to check whether, in collegiate female soccer players, pre- and inseason lower extremity power will remain unaltered. Methods: Twenty collegiate female soccer players, representing all field positions, participated. Lower extremity power was assessed by a series of drop jumps executed from four different heights (15, 30, 45, and 60 cm). Mechanical power was calculated using subject’s mass, jump height, and acceleration due to gravity. This value was further normalized by body mass of each athlete to obtain the relative (or normalized) mechanical power. Results: The normalized lower extremity mechanical power was highest when landing from the 30 cm height for both pre- and inseason periods. However, contrary to expectations, it turned out lower during the in-season than during the pre-season test, even though no significant differences were found between the corresponding jump heights. Conclusions: It is concluded that altered, perhaps inadequate, training strategies were employed during the in-season period. Besides, advantages of adding the relative mechanical power as a season readiness indicator are underlined compared with relying on the jump height alone.
Źródło:
Acta of Bioengineering and Biomechanics; 2015, 17, 3; 129-135
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of force-length curve for determination of leg stiffness during a vertical jump
Autorzy:
Struzik, A.
Zawadzki, J.
Powiązania:
https://bibliotekanauki.pl/articles/306593.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
asymetria
sprężystość
kwazizerowa sztywność
koszykówka
asymmetry
countermovement jump
elasticity
quasi-stiffness
basketball players
Opis:
Purpose: The aim of this study was to present the methodology for estimation of a leg stiffness during a countermovement jump. The question was asked whether leg stiffness in the countermovement and take-off phases are similar to each other as demonstrated in previous reports. It was also examined whether the stiffness in left lower limb is similar to the one in right lower limb. Methods: The research was conducted on 35 basketball players. Each participant performed three countermovement jumps with arm swing to the maximum height. Measurements employed a Kistlerforce plate and a BTS SMART system for motion analysis. Leg stiffness (understood as an inclination of the curve of ground reaction forces vs. length) was computed for these parts of countermovement and take-off phases where its value was relatively constant and F(∆l) relationship was similar to linear. Results: Mean value (±SD) of total stiffness of both lower limbs in the countermovement phase was 7.1 ± 2.3 kN/m, whereas this value in the take-off phase was 7.5 ± 1 kN/m. No statistically significant differences were found between the leg stiffness in the countermovement and the take-off phases. No statistically significant differences were found during the comparison of the stiffness in the right and left lower limb. Conclusions: The calculation methodology allows us to estimate the value of leg stiffness based on the actual shape of F(∆l) curve rather than on extreme values of ∆F and ∆l. Despite different tasks of the countermovement and the take-off phases, leg stiffness in these phases is very similar. Leg stiffness during a single vertical jump maintains a relatively constant value in the parts with a small value of acceleration.
Źródło:
Acta of Bioengineering and Biomechanics; 2016, 18, 2; 163-171
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The reliability and minimal detectable change of various physical performance tests among youth basketball players
Rzetelność i czułość baterii testów sprawności motorycznej koszykarzy w kategorii 'kadet'
Autorzy:
Krawczyk, Marcin
Siedlik, Daniel
Powiązania:
https://bibliotekanauki.pl/articles/2098308.pdf
Data publikacji:
2022-07-29
Wydawca:
Państwowa Wyższa Szkoła Zawodowa w Tarnowie
Tematy:
¾ Court Test
Lane Agility Test
skok bez zamachu
zeskok
sprawność fizyczna
koszykówka młodzieżowa
Countermovement Jump
Drop Jump
physical performance
youth basketball
Opis:
W trakcie meczu koszykówki główne czynności ruchowe, które wykonują zawodnicy to: bieg, skoki, bieg sprinterski oraz zmiany kierunku biegu. Wymienione czynności ruchowe powinny stanowić główną treść testów sprawności motorycznej w koszykówce. Rzetelność oraz zdolność do wykrywania minimalnej zmiany sprawności (Minimal-Detectable Change – MDC) w próbach stosowanych w koszykówce były rzadko raportowane. Celem opracowania jest wypełnienie tej luki i próba zaprezentowania wyników rzetelności i MDC często stosowanych testów sprawności motorycznej w badaniach, ale u koszykarzy w kategorii ‘kadet’. W tym celu przeprowadzono badania w grupie 14 koszykarzy w wieku 15,3 ±1,04 lat. Przeprowadzono próby skoczności, biegu po linii prostej oraz biegu ze zmianą kierunku. Na podstawie wyników tych prób obliczono wskaźnik siły reaktywnej, pędu sprintu oraz wskaźnika utylizacji cyklu rozciąganie–skurcz. Rezultaty badań własnych ujawniły, że najwyższe wyniki rzetelności osiągnięto dla uśrednionych wyników z próby drugiej oraz trzeciej. Dobrą możliwość wykrycia minimalnej zmiany sprawności odnotowano dla wszystkich prób, z wyjątkiem wskaźnika utylizacji cyklu rozciąganie–skurcz były na akceptowalnym poziomie. Zastosowanie procedury w niniejszym badaniu może stanowić praktyczne wskazówki w celu analizy zmian sprawności motorycznej koszykarzy.
During a basketball game, the main motor activities performed by the players are running, jumping, sprinting and changing the direction of the run. These motor activities should constitute the main content of the battery of physical performance tests in basketball. Reliability and the minimal detectable change (MDC) in tests used in basketball are rarely reported in literature. The aim of the study was to fill this gap and an attempt to show the reliability and MDC of various tests among basketball players in the Cadet category. For this purpose, research was carried out in a group of 14 basketball players aged 15.3 years. Jumping tests, sprint test and a change of direction test were carried out. Based on the results of these tests, the index of reactive force, sprint momentum and the utilization index of the stretch-shortening cycle were calculated. The reliability and MDC of all tests, with the exception of the utilization rate of the stretch-shortening cycle, were at an acceptable level. In practical terms using of the procedure described in this study may provide valuable guidance in the analysis of changes in basketball players' physical performance.
Źródło:
Health Promotion & Physical Activity; 2022, 19, 2; 19-25
2544-9117
Pojawia się w:
Health Promotion & Physical Activity
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-8 z 8

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