Zone 2 is a place in which an explosive atmosphere is not likely to occur in normal operation but, if it does occur, will persist for a short period only. These areas only become hazardous in case of an accident or some unusual operating condition.
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Zone 2 heart rate training refers to completing aerobic exercise below your aerobic threshold. Exercising in zone 2 encourages your body to rely on stored fat sources for fuel rather than carbohydrates. Zone 2 heart rate training can also promote metabolic flexibility, which has healthspan-related benefits.
That means zone 2 cardio can be running, brisk walking, cycling, swimming, rowing, skating, and elliptical training. Meet the expert: Melissa Kendter is an ACE-certified personal trainer, functional training specialist, and UESCA-certified run coach.