استجابة التهوية الرئوية و متغيريها عند أداء جهد بدني متدرج الشدة في ظرفي حرارة مختلفين لدى الأطفال بعمر (10-12)‎ سنة

الملخص EN

The aim of the research is to identify the significance of the differences in the variables of pulmonary ventilation when moving from rest to physical exertion of graded intensity in children aged (10-12 years) between the temperate environment and the hot environment.

The researchers assumed that there were no statistically significant differences in the variables of pulmonary ventilation when moving from rest to effort with gradient intensity in children aged (10-12) years between the temperate environment and the hot environment.

The two researchers used the descriptive approach in a comparative style for its suitability and the nature of the study, as for the research sample, it consisted of (10) children of (10-12) years of age from primary school students in the (Al-Jawadin) primary school for the academic year (2019-2020) from Diwaniyah governorate, The final experiment was conducted under a condition of moderate ambient temperature (22 °C ± 1) and humidity ranging (20-30 %) on the research sample in complete rest and during physical exertion gradient using the Bruce protocol to reach the maximum oxygen consumption (air voltage with gradient intensity) in Physiology Lab at the College of Physical Education and Sports Sciences / University of Al-Qadisiyah, and to process the data, the researcher used the following statistical methods to arrive at the results (arithmetic mean, standard deviation, coefficient of variation, body mass index, body surface area, and variance analysis using repeated measurements).

The researchers reached the following conclusions : •The physical exertion of gradual intensity Under moderate and hot environment conditions It would cause a noticeable increase in the transition from the resting phase to the aerobic voltage phase, and from the aerobic voltage stage to the anaerobic threshold stage, and from the anaerobic threshold stage to the maximum oxygen consumption stage In the pulmonary ventilation variables (respiratory rate, respiratory volume, pulmonary ventilation).

Exercising in an elevated thermal environment would affect and cause a noticeable increase in pulmonary ventilation when moving from the resting phase to the aerobic phase, compared to the moderate thermal environment.

•Exercising in a hot environment would affect and cause a noticeable increase in pulmonary ventilation when moving from the resting phase to the aerobic voltage phase, compared to the moderate thermal environment conditions.

•Exercising in a hot environment did not affect the respiratory rate and the size of the breath in all stages of effort, and In pulmonary ventilation variable when the transition from the aerobic voltage stage to the anaerobic threshold stage, and from the anaerobic threshold stage to the stage of maximum oxygen consumption, compared with the temperate environment condition.