| Abstrakt: |
One hundred and fifty ere unconditioned normal children aged 7yr 6 months to 12 yr 9 months were exercised to exhaustion utilizing graded progressive bicycle ergometry (James Protocol). There were 70 females and 81 rales. Heart rate, blood pressure, etri ventilatory gases were measured. ventilatory anerobic threshhold WAT), Quetelet index (QI) of ponderosity, and time of exercise after the VAT were calculated for an subjects. Baseline hsartrate (BHR), heart rate at maximum exercise (MaxHR), and 1 minute recovery heart rate (RHR) for males (M) and females(F) are shown in the table, with standard deviation.The only significant p < .001) intersex difference ford was the recovery heart rate (RHR) at 1 minute, females having higher 1 minute recovery heart rates than males. This could not be explained by differences in age, ponderosity (QT), Oxygen debt (time beyond VAT), or cardiopulmonary conditicn (VAT). Recovery heart rate at one minute has been used as a standard indicator of overall physical fitness. In the age group studied, females returned to baseline at a slower rate than did age and BSA matched males. This is not related to QI time at AT Max heart rate, VO2mzx, or VAT. Recovery heart rates should not be used as an index of physical fitness unless ccnpared to age-garter specific normal values. |
