Acta Gymnica, 2015 (vol. 45), issue 1

Physical activity of Czech adolescents: Findings from the HBSC 2010 study

Michal Kalman, Zdenek Hamrik, Erik Sigmund, Dagmar Sigmundová, Ferdinand Salonna, Czech National HBSC team

Acta Gymnica 2015, 45(1):3-11 | 10.5507/ag.2015.001

Background: It is well described that moderate-to-vigorous physical activity improves the health status of children and adolescents. Thus, monitoring the levels of physical activity together with the motives to perform is critical for future programs aiming to enhance physical activity in youth and young adults in the Czech Republic and further afield in other Central and Eastern European nations that are in transition. Objective: The aim of this study is to provide basic overview about moderate-to-vigorous physical activity (MVPA), vigorous physical activity (VPA) and motives to physical activity of Czech adolescents on the basis of gender and age...

Usefulness of training camps at high altitude for well-trained adolescents

Jiří Suchý, Jakub Opočenský

Acta Gymnica 2015, 45(1):13-20 | 10.5507/ag.2015.002

Objective: Opinions on the suitability of sports training at altitudes of 1800-2200 m above sea level (ASL) for increasing performance in youth are not unanimous. The objective of this study was to test the influence of a ten day altitude training camp on performance in well-trained adolescent cross-country skiers. Methods: A running test of 3 × 2 km (aerobic, anaerobic and critical intensity) was used with a rest interval of 10 minutes. The test was performed 4 times - an initial test at a lowland (900 m ASL) prior to departure for altitude, two tests at altitude (1850 m ASL), a final test ten days after returning to lower altitudes. The aerobic,...

Stability of internal response and external load during 4-a-side football game in an indoor environment

Karel Hůlka, Radim Weisser, Jan Bělka, Pavel Háp

Acta Gymnica 2015, 45(1):21-25 | 10.5507/ag.2015.003

Background: Small-sided games (SSG) are spontaneous forms of specific training where exercise intensity can be manipulated mainly by modifying external factors. When using the SSG, there is a risk that the variability of intensity between players and on repetition of SSG may lead to some players training at inappropriate exercise intensities. Objective: The purpose of this study is to determine intra-individual repeatability and inter-individual variability in exercise intensity in small-sided 4on4 football games. Methods: Twenty five highly trained junior football players (age 17.68 ± 1.52 years; BMI 23.8 ± 1.92 kg . m-2) participated...

The benefit of hippotherapy for improvement of attention and memory in children with cerebral palsy: A pilot study

Eva Krejčí, Miroslav Janura, Zdeněk Svoboda

Acta Gymnica 2015, 45(1):27-32 | 10.5507/ag.2015.004

Background: The research is based on an assumption that the hypokinesia induced by cerebral palsy (CP) leads to inhibition of some mental functions. The method we used to treat patients with CP, hippotherapy (HT), is a treatment using horses and belongs to proprioceptive-neuromuscular-facilitative methods. Objective: The aim of the research was to determine the benefit of HT on attention and memory of patients with CP. Methods: There were two groups of patients: short-term HT (n = 11; 8 females and 3 males, age 15.4 ± 5.3 years) and long-term HT (n = 9; 7 females and 2 males, age 10.8 ± 2.7...

The "Akopian" vault performed by elite male gymnasts: Which biomechanical variables are related to a judge's score?

Roman Farana, Jaroslav Uchytil, David Zahradník, Daniel Jandačka

Acta Gymnica 2015, 45(1):33-40 | 10.5507/ag.2015.005

Background: A vaulting performance takes a short time and it is influenced by and affects the quantity of mechanical variables. The significant relationships between the vaulting score and specific aspects of the gymnast's vault should conduct coaches to monitor these variables as a part of training or routine testing. Objective: The aim of the current study was to determine the biomechanical variables that are related to a successful performance of the Akopian vaults performed by top level male gymnasts during the World Cup competition. Methods: Fifteen top-level male gymnasts participated in this study. For the 3D analysis, two digital camcorders...

Analysis of muscle activity in various performance levels of Ollie jumps in skateboarding: A pilot study

Michal Vorlíček, Zdeněk Svoboda, Markéta Procházková

Acta Gymnica 2015, 45(1):41-44 | 10.5507/ag.2015.006

Background: Correct mastering of a basic Ollie jump is essential for development of other jumps in skateboarding. In scientific literature we can find a lack of scientifically proved knowledge that describes the difference in muscular activity on various levels of this jump performance. Objective: The aim of this study was to characterize muscular activity in the basic skateboard Ollie jump and to compare this activity with a more difficult modification of the switchstance Ollie jump (the same jump but changed position of limbs). Methods: Ten men experienced in skateboarding for several years, aged 20.0 ± 4.6 years participated in the study (height...