A certain level of motor fitness is required. VO2max maximal oxygen consumption the most oxygen that can be taken in and utilized during exercise. VO2peak the measurement of the most oxygen consumed when maximal criteria are not met. VCO2 is volume of carbon dioxide produced per minute Phosphagens energy stores of the muscle. Pfk phosphofrutokinase themost important enyzme involve in the glycolytic process Q cardiac output or the volume of blood pumped per minute.
Children can perform endurance tasks reasonably well.
But the hare more likely to fatigue quicker during high intensity long term exercise. Same metabolic ability in brief intense exercise Preadolescent children reach metabolic steady state faster Childern have a lower oxygen deficit - Faster recovery well suited for intermittent ex. Children perceive exercise as easier Children are able to exercise closer to peak exercise levels than adults before reach lactate threshold limited in ability to transport core heat to surface for dissipation during intense exercise in th heat max heart rate is between 195 and 215 until reach maturity compensates for lower sv thus lower max Q and submax Q lower sv and higher hr higher heart rate at a given submaximal ex level. Lower blood vol., hemoglobin and hemoglobin concentration in child. Leads to potential problim in blood supply during maximal exertion in hot climates.