**Mar´ıa Carrasco-Poyatos, Alberto Gonzalez-Qu´ılez, ´ Ignacio Mart´ınez-Gonzalez-Moro ´ and Antonio Granero-Gallegos**

HRV-Guided Training for Professional Endurance Athletes: A Protocol for a Cluster-Randomized Controlled Trial

Reprinted from: *Int. J. Environ. Res. Public Health* **2020**, *17*, 5465, doi:10.3390/ijerph17155465 . . . **313**
