What Is Zone 2 Cardio, and Why Are Trainers Suddenly Obsessed With It?
Zone 2 cardio is one of the most searched fitness terms this year, but few people know why it works. Here's the science behind training your body's fat-burning engine.
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Zone 2 cardio is one of the most searched fitness terms this year, but few people know why it works. Here's the science behind training your body's fat-burning engine.