However, others have described stable values for VEmax per kilogram across the childhood years. In the study of Robinson,2 the 6- and 15-year-olds demonstrated a mean value of 1.59 and 1.60 L/kg/ min, respectively. Morse et al could find no relationship of maximal Ve per kilogram to age in boys whose ages ranged from 10 […]
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Unlike other links in the oxygen delivery chain, such as cardiac output and muscle aerobic activity, the components of ventilation (Ve, Vt, and fR) are easily measured during exercise testing. Thus, barring technical error, reported data such as that provided in this study can be presumed to provide an accurate assessment of developmental changes in […]
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Changes in weight and height for boys and girls over the 5 years are presented in Table 1. Although the boys were heavier and taller at all ages, no significant gender differences were observed. Mean values (SD) for maximal oxygen uptake (Vo2max) at the initial testing session were 48.9 (7.2) and 47.7 (6.4) mL/kg/min for […]
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Twenty children (11 boys, nine girls) volunteered for annual treadmill testing over 5 years for assessment of submaximal and maximal measurements of respiratory exchange variables. Data from one girl who moved away were not available for the final testing session. The subjects were generally physically active. Seventeen were participants on community sports teams, but none […]
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Cross-sectional studies have indicated that the pattern of ventilatory responses to exercise evolves during the course of childhood. This 5-year study was designed to provide a longitudinal assessment of minute ventilation (Ve), tidal volume (Vt), and breathing frequency (fR) in 20 children (11 girls, nine boys) between the ages of 9 and 13 years. Subjects […]
Read moreA total of 119 patients were studied. Their mean age was 7.9±5.6 years. Sixty-eight (57.1%) of them were males and 51 (42.9%) were females, giving a male-female ratio of 1.3:1 As shown in Table 1, among 78 patients whose genotype were determined, 49 (62.8%) had hemoglobin genotype AA (HbAA) and 16 (20.5%) had HbSS, while […]
Read moreThis study was carried out at the Olabisi Onabanjo University Teaching Hospital, Sagamu, Nigeria. All pediatric and adolescent patients admitted between January 1996 and December 2002 were identified from the admission records of the orthopedic and pediatric services. These were compared with the central medical records to ensure completeness of identification. All patients with bone […]
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