VO2 Values

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The main limitation of heart rate to predict VO2 values is that it may not show a correct value. Laboratory test have many different protocols and have a set intensity at certain times which affects HR and VO2 values. Interval running which is found in sports such as soccer and constant-rate running such as distance running, utilize similar amounts of oxygen when performed at max sustained speed (Pratt, Brendan, and Clark, 2013). Some scientists suggested that HR might not be able to reflect correct VO2 values in soccer activities (Esposito, 2004). In soccer exercises there are different paces of running, walking, and jogging so HR may rise and decrease. Environmental factors also play a difference in the HR and VO2 values. According to the

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