The heart rate zones that are generally anaerobic in nature is : ( B ) Zones 4 and 5
ZONES 4 and 5
Exercises carried out in these heart rate zones ( 80-100% of MHR ) are considered anaerobic in nature as the body because at this stage, The human body does not use oxygen as its source of energy/fuel, but uses the glucose stored in the muscles of the performer as a source of energy.
These heart rate zones can be attained by professional athletes.
Hence we can conclude that The heart rate zones that are generally anaerobic in nature is : ( B ) Zones 4 and 5
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