and zone four should be what you consider your threshold workout in which you max out. Devices can also calculate heart rate variability, which monitors how recovered or tired you are between ...

That’s where runners will improve their threshold. The break will allow runners to relax their muscles, their breathing, and their heart rate without clearing out the lactate. After a warmup ...

Objectives: To analyse the heart rate (HR) response and estimate the ultraendurance threshold—the optimum maintainable exercise intensity of ultraendurance cycling—in ultraendurance elite cyclists ...