**Antonio Granero-Gallegos, Alberto Gonz´alez-Qu´ılez, Daniel Plews and Mar´ıa Carrasco-Poyatos**

HRV-Based Training for Improving VO2max in Endurance Athletes. A Systematic Review with Meta-Analysis Reprinted from: *Int. J. Environ. Res. Public Health* **2020**, *17*, 7999, doi:10.3390/ijerph17217999 . . **383**
