Acta Universitatis Palackianae Olomucensis. Gymnica, 2013 (vol. 43), issue 2

Comparison of the values of measured hydratation of sporting youths with normative values

Petr Kutáč

Acta Univ. Palacki. Olomuc., Gymn. 2013 43(2): 7-13 | 10.5507/ag.2013.007

Backround: When measuring body composition, we monitor the fractionalization of body weight and the share of the individual elements in its aggregate value. The total body water (TBW) is a very important element in addition to the share of body fat (BF), muscle mass and bone minerals. Water is the largest element of the body weight and its sufficient amount (organism hydration) is a condition for maintaining the physiological functions of the person and thus has an immediate effect on the health of the individual. Objective: The aim of the study is to check the standard values of the percentage share of the representation of the total...

The impact of the initial stance position on lower limb joint kinetics in the taekwondo roundhouse kick

Daniel Jandačka, Isaac Estevan, Miroslav Janura, Coral Falco

Acta Univ. Palacki. Olomuc., Gymn. 2013 43(2): 15-22 | 10.5507/ag.2013.008

Background: To achieve good performance, taekwondo athletes should optimize the stance position of the foot on the ground. Objective: The aim of this study is to compare generated net joint power (hip, knee and ankle) during stance phase, magnitude of peak foot velocity of the attacking lower extremity and execution stance time produced from three stance positions (forward "0°", diagonal "45°", orthogonal "90°") in the taekwondo roundhouse kick. Methods: Ten taekwondo athletes participated in the study; their experience of practicing taekwondo ranged between 13.8 ± 5.8 years. The kinetics and kinematics of the athletes'...

Self-reported physical activity in perceived neighborhood in Czech adults - national study

Josef Mitáš, Karel Frömel, Svatopluk Horák, Jiří Nykodým, Oldřich Racek, Emil Řepka, Zdeněk Šebrle, Ladislav Bláha, Aleš Suchomel, Dana Feltlová, Igor Fojtík, Petr Valach, Tomáš Klobouk

Acta Univ. Palacki. Olomuc., Gymn. 2013 43(2): 23-30 | 10.5507/ag.2013.009

Background: International studies associate physical activity (PA) to other factors such as the environment, culture, and policy. External influences on lifestyle and PA, such as the effect of the physical and built environment, are discussed. Neighborhood environments seem to be one of the important aspects in prevention of unhealthy lifestyle and physical inactivity research. Objective: The main objective is to analyze the relationship between PA and neighborhood environment of the adult population of the Czech Republic. The study tries to define the basic correlates of PA in relation to environmental and other socio-demographic factors....

Power assessment of lower limbs and strength asymmetry of soccer goalkeepers

František Zahálka, Tomáš Malý, Lucia Malá, Tomáš Gryc, Pavel Hráský

Acta Univ. Palacki. Olomuc., Gymn. 2013 43(2): 31-38 | 10.5507/ag.2013.010

Background: Effective execution of vertical jump depends on the explosive power of lower limbs and their symmetrical integration mainly. Assessment of lower extremity bilateral asymmetries in soccer players is important for both injury prevention and performance. Objective: The aim of this study was to identify and compare parameters of lower limb power in three different jump tests in elite soccer goalkeepers. The next aim was to describe and compare strength asymmetries of force exerted by lower limbs in the take-off phase in all tests. Method: The research group consisted of 25 elite soccer goalkeepers (age 26.5 ± 9.1 years,...

Effect of modified method of autonomic nervous system activity assessment on results of heart rate variability analysis

Michal Botek, Jakub Krejčí, Filip Neuls, Jiří Novotný

Acta Univ. Palacki. Olomuc., Gymn. 2013 43(2): 39-46 | 10.5507/ag.2013.011

Background: Quickness and simplicity of examining procedures belong to the key criteria of decision-making process whether the spectral analysis of heart rate variability (SA HRV) would be implemented into the sports training routine as a diagnostic tool. Objective: The main aim of this study was to find out how results of the SA HRV are influenced when reducing duration of the first position of standardized orthoclinostatic maneuver (supine-standing-supine) from 5 minutes to 60 seconds. Methods: The sample consisted of 28 healthy persons divided into two groups (G1 - n = 14, 7 males and 7 females aged...

Some views of elite athletes on cooperation with the media and the media's influence on sports and private lives

Marko Zadražnik, Mojca Doupona Topič

Acta Univ. Palacki. Olomuc., Gymn. 2013 43(2): 47-54 | 10.5507/ag.2013.012

Background: Today, sport represents an element of the quality of life as it is often an indicator of a country's civilisational, societal and economic development. The public is mostly interested in elite sport which has effects for both society as well the lives of individuals as the public is not only interested in sports achievements but also in athlete's private lives. The border between the public and private is difficult to establish. The interlinked work of elite athletes and the media often results in misunderstandings as the media intrudes on the private lives of athletes, which in turn impacts both the private and professional lives...