Heart rate training is a progression from running by feel or running by pace, as both methods can be inherently inaccurate.

Q: I'm a 32-year old Army officer training to run my first marathon this spring. I train with a HRM, but am having a tough time with "standard" max heart rate computations. According to the "220-age" ...

I am trying to get back in shape. I am having a hard time either running slow enough or walking fast enough to stay within an aerobic zone with HRM. Which would be more beneficial? Historically, I ...