Your running watch is a helpful tool, but its heart rate zones may not be as personal as they look. Here’s why estimated zones can mislead your training, and how VO₂ max testing can give you a more accurate heart rate zone prescription.
Your running watch is a helpful tool, but its heart rate zones may not be as personal as they look. Here’s why estimated zones can mislead your training, and how VO₂ max testing can give you a more accurate heart rate zone prescription.
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