Zone 2 training is cardio done at a steady, low intensity. It has benefits for aerobic training (so you can run faster), anaerobic training (helping you to recover faster between reps and sets, or ...
3don MSN
The heart rate zone formula is flawed, especially for women. Here's how to rethink your training.
That tension becomes especially clear with heart rate zone training, a popular five-tier system that endurance athletes use ...
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