Acta Gymnica, 2018 (vol. 48), issue 4
Muscle activity during the incline shoulder press in relation to the exercise intensity
Katarzyna Stronska, Paulina Bojacz, Artur Golas, Adam Maszczyk, Adam Zajac, Petr Stastny
Acta Gymnica 2018, 48(4):141-146 | DOI: 10.5507/ag.2018.019 
Background: The incline machine shoulder press (IMSP) is an alternative resistance exercise to the bench press associated with throwing performance. The muscle activity during IMSP has not yet been described in females and at different exercises intensities. Objectives: The aim of this present study was to investigate changes in the activity of prime movers during the IMSP in relation to the exercise intensity in female athletes. Methods: Eight female athletes experienced in resistance training were screened for peak electromyography amplitude normalized for maximum voluntary isometric contraction during the IMSP with increasing loads of 40%, 60%,...
Playing tennis matches on clay court surfaces are associated with more perceived enjoyment response but less perceived exertion compared to hard courts
Bulent Kilit, Ersan Arslan
Acta Gymnica 2018, 48(4):147-152 | DOI: 10.5507/ag.2018.021
Background: A few studies have shown that different types of court surfaces can have different effects on tennis match performance in different age groups, however, no studies have researched on tennis match performance responses in young tennis players. Objective: The purpose of this study was to evaluate the effect of different court surfaces on psychophysiological responses, time-motion and match characteristics of young tennis players. Methods: Twenty-six young male tennis players (age 13.0 ± 0.3 years, body height 158 ± 8 cm, body mass 48 ± 7 kg) volunteered to participate in the study. Heart rate was monitored along with total...
The role of the YMCA in shaping modern sport and the Olympic Movement in Germany
Tomáš Tlustý
Acta Gymnica 2018, 48(4):153-160 | DOI: 10.5507/ag.2018.022
Background: This paper looks at the history of physical education and sport in the German Young Men's Christian Association (YMCA). Objective: The aim of this article is to show the contribution of the YMCA to the formation of modern sports and the Olympic movement in Germany. Methods: Standard historical methods are used therein. Everything is written in chronological order. Results: The first local German YMCA was established in 1883. It gradually began to assume responsibility for much of the physical education sphere in Germany, although sport had clearly not yet become a prominent part of German physical education. That did not change until the...
Influence of familiarization on preschool children's motor tests results
Bojan Međedović, Romana Romanov, Violeta Zubanov, Dušan Perić, Dušan Stupar, Zlatko Ahmetović
Acta Gymnica 2018, 48(4):161-166 | DOI: 10.5507/ag.2018.020
Background: Various field tests can be used to evaluate children's motor skills. Because of the complexity of their motor skills, which at their age are still in a very intensive stage of development, it is inadequate to use the same test protocol as in the adult population, as children receive and process information in a different way. Some evidence showed that familiarization with test protocols is important in children's motor skills evaluation process. Objective: The purpose of this study was to examine the influence of familiarization on motor test results for the assessment of motor skills in preschool children population. A controlled research...
Hydration status in Czech elderly adults: Gender and physical activity differences
Iva Klimešová, Julie Wittmannová, Liběna Kováčová
Acta Gymnica 2018, 48(4):167-174 | DOI: 10.5507/ag.2018.023
Background: Dehydration is the most common fluid and electrolyte problem among elderly people. The elderly leading an active lifestyle may be a risk group vulnerable to dehydration. Objective: The goals of the study were: to assess hydration status and the fluid intake, to determine gender differences in hydration status and fluid intake, and to determine the role of physical activity on hydration status in free-living elderly people. Methods: The research sample included 105 participants aged 67.2 ± 3.7 years (52% women) living independently in their own homes. Urine specific gravity (USG) was used to evaluate the hydration status (dehydration...
Changes of bone metabolism markers following additional isokinetic and isotonic training and its subsequent cessation in advanced level adolescent weightlifters
Mohamad Faiz Abdul Rahim, Shazlin Shaharudin
Acta Gymnica 2018, 48(4):175-181 | DOI: 10.5507/ag.2018.024
Background: Physically active people present overall accelerated bone turnover. However, less is known about the effects of different types of resistance training on bone metabolism markers among adolescent weightlifters. Objective: The purpose of this study was to investigate the effects of isokinetic training versus isotonic training of rotator cuff muscles and one month of cessation of training on blood bone metabolism markers among adolescent advanced level weightlifters. Methods: Sixteen adolescent male weightlifters (age 14.88 ± 1.31 years) who represented their state in Malaysia were weight-matched and randomly assigned into two training...