HIIT vs Zone 2 training. What's the best choice? It’s common to think that Zone 2 training and high-intensity interval training (HIIT) sit at opposite ends of the conditioning continuum. But it’s not always as clear-cut. For the heart to respond
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HIIT vs Zone 2 training. What's the best choice? It’s common to think that Zone 2 training and high-intensity interval training (HIIT) sit at opposite ends of the conditioning continuum. But it’s not always as clear-cut. For the heart to respond