Background. There is evidence of physical exercise effect on the adolescents’ balance and strength; however it is not known how aforementioned variables respond to physical exercise with different loads and intensities. Therefore, the aim of the study was to assess the impact of single bout of physical exercise of different intensity on adolescents’ body balance and muscular strength.Methods. Thirty healthy, physically active 11–13-year-old adolescents were randomly allocated to one of the two groups. Both groups performed single bout of physical exercise of high- or low-intensity climbing up and down-stairs. Postural sway and maximum voluntary contractions (MVC) were assessed before and after physical exercise. Results. No statistically significant impact of low or high intensity exercise was found at adolescents’ MVC. High intensity exercise influenced bigger postural sway with eyes closed compared to eyes open ( p < .05). After high-intensity exercise there was a significantly greater postural sway with eyes closed than with eyes open (p < .05). Conclusions. High and low intensity physical exercise had no impact on the adolescents’ maximum voluntary contraction, whereas high intensity exercise deteriorated body balance with eyes closed.
Research background and hypothesis. Physical fitness problems in biathlon are quite extensively discussed, but biathlon shooting in Lithuania is not analyzed enough. The special literature lacks information about the shooting parameters that leaders demonstrate in the world biathlon championships. Moreover, shooting parameters in different age and gender groups have not been analyzed enough. The hypothesis that shooting parameters in adult, youth and junior age group biathletes would differ was tested. Research aim. The aim of our study was to analyze shooting parameters of biathletes in various age groups in 2011–2012 world championships and reveal fundamental differences in the aspects of age and gender. Research methods. Research participants were youths (age: 17–18 years), juniors (age: 19–20 years) and adults (age: 21–41 years), male and female biathletes. The number of subjects was 2175. Descriptive statistical methods were used for data analysis.Research results. Data analysis revealed the main differences in shooting parameters between adult, junior and youth groups, male and female biathletes. Also, comparison of shooting parameters between biathletes in various age groups and leaders in the same group was carried out. Discussion and conclusions. Our research revealed that the highest shooting accuracy was observed in adult male and female biathlete groups (p < 0.025). The shooting accuracy of junior and youth female biathletes was higher than that in the junior and youth male groups (p < 0.05). The longest average shooting time was in youth group (p < 0.001). The shooting time of biathletes in adult group was the shortest. We found that male biathletes in various age groups performed shots in less time compared to female biathletes (p < 0.05). Research results revealed that shooting parameters among leaders statistically significantly differed comparing them with the average shooting parameters in the group (p < 0.05).
Research background and hypothesis. Increase in physical capacity and fitness can lead to additional improvements in health status, which is so important for healthy aging. Most scientists emphasize the physical activity decline in people of all ages. Therefore, it is important to assess health-related physical capacity and encourage people of various ages to improve their health, physical fitness and the quality of their life. Hypothesis – a significant decline in physical capacity of the elderly will be identified during the research period.Research aim – to identify the variation dynamics of physical capacity indices of elderly people.Research methods. 60–69-year-old males and females were selected for the data analysis (n = 244). The anthropometric data and the physical capacity test results of trunk flexion, sit ups, balance and 1000 meter run were analysed. Physical capacity tests were carried out on the basis of the ‘Eurofit’ test methodology. The methods of descriptive statistics were used for the data analysis.Research results. Body balance (43.8%) and aerobic capacity (20.8%) of the elderly males significantly declined (p < 0.05) during the experimental period. However, improvement in the flexibility of males 16.5% (p < 0.05) was identified. The capacity of trunk flexor muscles of elderly females improved significantly by 39.3%, while the balance – by 18.1% (p < 0.05). Analysis of the results in reference to gender showed that the balance, the capacity of trunk flexor muscles and aerobic capacity of elderly females increased significantly in comparison with males (p < 0.05). Nevertheless, the flexibility variation of males was higher than the one of females (p < 0.05) at the end of the research period.Discussion and conclusions. The balance and aerobic capacity of elderly males significantly decreased, whereas the flexibility improved. The capacity of trunk flexor muscles and balance of elderly females resulted in a statistically significant increase. In reference to the gender aspect it was determined that the majority of physical capacity results of elderly females statistically significantly developed more than the physical capacity results of males.
Skirtingo amžiaus ir lyties suaugusiųjų motorinės sistemos nuovargio po nepertraukiamo izometrinio krūvio skirtumai (MG 440; Medicor, Budapest, Hungary) . Eksperimentą sudarė nepertraukiamas, 30 s trunkantis izometrinis krūvis, kuriam atlikti reikia maksimalių keturgalvio šlaunies raumens susitraukimų, su įterpto impulso (P100TT) metodika, kuria apskaičiuojamas centrinės aktyvacijos rodiklis (CAR). Po eksperimento praėjus 5 ir 10 min įvertintas valingos (MVJ) ir nevalingos (20 Hz, 100 Hz) jėgos atsigavimas. Tyrimo rezultatai parodė, kad pradinės jaunų tiriamųjų nevalingos jėgos, MVJ ir CAR reikšmės buvo didesnės nei senyvo amžiaus tiriamųjų. Taip pat vyrai pasiekė didesnę MVJ ir aukštesnį CAR nei to paties amžiaus moterys (p < 0,05
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