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Circulatory and respiratory responses to muscular exercise in Czech and Norwegian children
Insights
Czech children exhibit superior physical fitness compared to Norwegian children, showing higher aerobic power and lung function. This difference in cardiorespiratory fitness becomes more pronounced with age.
Area of Science:
- Exercise Physiology
- Pediatric Health
- Comparative Anatomy
Background:
- Understanding ethnic and age-related differences in physical fitness is crucial for pediatric health.
- Previous research has not extensively compared cardiorespiratory and pulmonary function between Czech and Norwegian children.
Purpose of the Study:
- To compare the functional characteristics of the circulatory and respiratory systems in healthy Czech and Norwegian rural children.
- To investigate age and sex-related differences in work physiological variables and pulmonary volumes.
Main Methods:
- Randomized sampling of 8, 12, and 16-year-old boys and girls from Czech and Norwegian rural populations.
- Measurements included maximal aerobic power, maximal heart rate, submaximal heart rate for oxygen uptake, forced vital capacity (FVC), and forced expiratory volume in one second (FEV1).
- Maximal ventilation volumes and respiratory rate during exercise were also assessed.
Main Results:
- At 8 years, maximal aerobic power was similar; older Norwegian children showed lower physical fitness.
- Czech children (12 and 16 years) had lower submaximal heart rates for equivalent oxygen uptake.
- Czech children demonstrated significantly higher FVC and FEV1, with higher maximal ventilation volumes during exercise.
Conclusions:
- Czech children generally exhibit superior cardiorespiratory fitness and pulmonary function compared to Norwegian children, particularly in older age groups.
- While maximal heart rate and respiratory rate showed minimal variation, differences in aerobic capacity and lung volumes highlight potential environmental or lifestyle influences.
- These findings provide valuable insights into the physiological development and fitness levels of children in different European regions.
Abstract:
This paper presents a comparison between Czech and Norwegian rural healthy children with regard to the functional characteristics of the circulatory and respiratory system based upon work physiological variables and measurements of some pulmonary volumes. The study included randomised samples of boys and girls at the age of 8, 12 and 16 years, 66 Czech boys and 63 girls, 54 Norwegian boys and 57 girls. At the age of 8 years the maximal aerobic power was closely similar in both countries, but in the older age groups the Norwegian children exhibited lower physical fitness. The maximal heart rate was close to 200 min-1 on the average without any sex, age or ethnic differences. In agreement with the higher maximal aerobic power the 12 and 16 year old Czech children had lower submaximal heart rates for the same oxygen uptake than the Norwegian children. The forced vital capacity and forced expiratory volume in one second was significantly higher on the average in Czech than in Norwegian children but the latter, expressed in percent age of the former, averaged 87 to 91% without any sex, age or ethnic differences. The maximal ventilation volumes during muscular exercise reached higher values in Czech than in Norwegian children of the same age, but the mean maximal respiratory rate was close to 60 min-1, being independent of age, sex and cultural differences. During heavy exercise only 40 to 50% of the vital capacity and 45 to 55% of the forced expiratory volume were taken into account and this index of pulmonary function did not differ with sex, age or ethnic differences.