Understanding your heart rate can be helpful to calibrate your perceived exertion, especially on easy and steady runs. This ...

Not that it was ever unpopular, but it’s fair to say that running is going through somewhat of a renaissance right now. Data released by Sport England in April of this year revealed that 250,000 more ...

Running in zone 2, by definition, should feel easy. And that’s a good thing, considering zone 2 runs make up the majority of any good training plan. These easy efforts serve as the building blocks for ...

That tension becomes especially clear with heart rate zone training, a popular five-tier system that endurance athletes use to measure effort and fine-tune performance. The well-known formula is ...