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Table 4 Training Intensity for amateur athletes [143, 145,146,147]

From: Sport, doping and male fertility

Intensity

% Heart rate Reserve (HRR) or % oxygen uptake reserve (VO2R)

% Heart rate (HR) max

% maximum oxygen uptake (VO2max)

Very low

<  30

<  57

<  37

Low

30–39

57–63

37–45

Moderate

40–59

64–76

46–63

High

60–89

77–95

64–90

Very High (Elite training)

>  90

>  96

>  91