Acta Gymnica, 2019 (vol. 49), issue 4
Assessment of the body response to specific fatigue exercise protocol SAFT90 in U16 soccer players
Barbora Sládečková, Michal Botek, Jakub Krejčí, Michal Lehnert
Acta Gymnica 2019, 49(4):157-163 | DOI: 10.5507/ag.2019.017 
Background: SAFT90 is a specific multidirectional fatigue protocol that imitates the internal and external load of soccer match-play. Objective: The aim of the study was to evaluate the impact of SAFT90 on lactate production, heart rate (HR) and rate of subjective perceived exertion (RPE) expressed by Borg scale (6-20). Methods: Fourteen male elite junior soccer players (age 15.9 ± 0.2 years, stature 180.8 ± 5.5 cm, body mass 69.8 ± 5.8 kg, body fat 8.1 ± 3.2%, VO2max 57.6 ± 4.7 ml ⋅ kg-1 ⋅ min-1, maximum heart rate 192.8 ± 4.6 beats ⋅ min-1) participated...
The effect of observing different information on learning the basketball jump shot
Saleh Rafiee, Amir Dana
Acta Gymnica 2019, 49(4):164-173 | DOI: 10.5507/ag.2019.015
Background: Absolute and relative information may have different roles during motor learning through observation.Objective: This study aimed to address the effect of observing different information on the learning of the basketball jump shot. Methods: For this purpose, 30 participants were included in the study and divided into three groups (Full Body, Arm, and Wrist) according to the information they observed. Full Body group observed information relating to all body parts, Arm group observed information relating to the throwing arm, and the Wrist group observed the information relating to the throwing wrist. All information was presented in the point...
Does the duration of static stretching acutely interferes on the strength endurance performance?
Aline Alves da Silva, Emerson Luiz Teixeira, Vitor de Salles Painelli
Acta Gymnica 2019, 49(4):174-180 | DOI: 10.5507/ag.2019.019
Background: Stretching may promote detrimental effects on power output and maximal strength, but its direct effect on strength endurance remains unclear, as well as the influence of stretching duration. Objective: We aimed to evaluate the direct effect of static stretching of the quadriceps muscle, as well as the stretching duration, on the strength endurance during a unilateral knee extension exercise. Methods: Fifteen strength-trained men (age 28 ± 3 years, height 1.70 ± 0.09 m, body mass 70 ± 5 kg, training experience 5 ± 1 years) took part in a randomized counterbalanced cross-over study. Participants' total number of...
Validity and reliability of a bilateral assessment of locomotor skills in children
Franjo Lovric, Igor Jelaska, Cain C. T. Clark, Michael Duncan, Durdica Miletic
Acta Gymnica 2019, 49(4):181-188 | DOI: 10.5507/ag.2019.018
Background: There is a paucity of empirical research on motor asymmetry in healthy children using currently available assessments. Objective: This study sought to develop bilateral tests for quantitative and qualitative assessment of locomotor skills in typically developing children and assess their validity and reliability. Methods: A sample of 78 children (35 girls, age 7.34 ± 0.53 years) underwent testing using three newly constructed bilateral tests: side rolling, single leg skips and single leg hops. Results: Between-subject reliability (Cronbach alpha: .97 to .98, .98 to .99, .98 to .99, respectively), within-subject reliability (coefficient...
Healthy lifestyles and body mass index as correlates of body image dissatisfaction in primary schoolchildren
Luis Calmeiro, Carlos Pereira
Acta Gymnica 2019, 49(4):189-196 | DOI: 10.5507/ag.2019.016
Background: Body image is a representation of the self that develops from an early age. Such representations are likely to be associated with lifestyle choices. Objective: The purpose of this study was to explore the relationships between health behaviours (i.e., physical activity, screen time and adherence to the Mediterranean diet), body mass index (BMI) and body image dissatisfaction among primary schoolchildren. Methods: A total of 782 pupils (age 7.92 ± 1.36 years), 405 boys (age 8.01 ± 1.38 years) and 377 girls (age 7.95 ± 1.33 years) from the Southeast region of Portugal, answered a survey containing the Mediterranean Diet Quality...
Hydration status and the differences between perceived beverage consumption and objective hydration status indicator in the Czech elite deaf athletes
Iva Klimešová, Jakub Krejčí, Michal Botek, Filip Neuls, Barbora Sládečková, Michal Valenta, Svatava Panská
Acta Gymnica 2019, 49(4):197-202 | DOI: 10.5507/ag.2019.020
Background: Although there is a well documented negative effect of dehydration on exercise performance, athletes commonly start their exercise inadequately hydrated. This fact suggests that athletes do not adequately replenish their fluids and we can also speculate that they are unable to properly estimate their beverage intake. Objective: To evaluate the hydration status, the beverage intake, and differences between perceived adequate fluid intake and laboratory indicator of hydration status in elite deaf athletes. Methods: It was a cross-sectional study. The research group consisted of 62 male athletes organized in the Czech Deaf Sports Federation...