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Aktywność fizyczna determinantą zdrowia populacji

100%

Ucieklak-Jeż P. , Bem A.

Ekonomia. Wrocław Economic Review

2017

tom 23

nr 4

305 - 318

In this paper we verified and analysed the relationship between: (1) cycling (in minutes) and doing another sports, in a typical week, and social determinants of health; (2) moving on foot in public space and social determinants of health; (3) physical activity associated with the performance of work and the social determinants of health; (4) physical activity and health assessment, long-term health problems, diseases and chronic ailments, and athleticism. We constructed three research hypotheses: (H1) residents of densely populated areas (large cities) are physically active; (H2) the longer the time average intensity of physical activity, the healthier the population; (H3) the healthiest group are people physically active. The first hypothesis was positively verified — inhabitants of large cities often spend a lot of time at work, are stressed and need some physical activity. The second hypothesis was confirmed only partially: Chi square = 1692,469; Yul φ = 0,322; Q-Kendalla = 0,297 indicate that there is a statistically significant relationship between the amount of time spent on sports and health. The longer time spent on sport, the better health. The third hypothesis was also confirmed — active physical enjoy better health.

The influence of sounds on posture control

63%

Siedlecka B. , Sobera M. , Sikora A. , Drzewowska I.

Acta of Bioengineering and Biomechanics

2015

tom Vol. 17, no. 3

95--102

Purpose: It is still not clear which parameters of sound are the most significant for body reactions and whether the way of sound reception plays a role in body control. The purpose of this study was to determine the influence of frequency, spectrum and loudness of sounds on posture control in healthy women and men. Methods: The study subjects were 29 young adults who were submitted to a 60-second standing test in the bipedal stance on the force platform (AMTI). During the tests, 3 sinusoidal sounds with various timing and 2 musical sounds (guitar and piano) of the frequency 225 Hz, 1000 Hz and 4000 Hz were applied through headphones. The centre of pressure (COP) amplitude was registered. The sway area and COP mean velocity were computed. Results: It was found that high frequency sounds contributed to a significant decrease of sway area values. No significant influence of low frequency sounds on posture control was observed. The influence of the sound spectrum (timbre) on posture control is limited; only the crescendo spectrum improves the body stability in the bipedal stance and not the music spectrum as guitar and piano. The loudness of sound, although extremely high, is not the cause of postural control changing in relation to lower loudness. No effect of gender was found in terms of body stability under different sound conditions. Conclusion. Based on the results, it can be argued that, in general, in a bipedal stance in terms of stability high sound frequency improves posture control, whereas sound spectrum and intensity show a limited impact.