Tracking Changes in Maximal Oxygen Consumption with the Heart Rate Index in Female Collegiate Soccer Players

The purpose of this study was to determine if the HRindex Method (VO 2max = [6 x HRindex - 5] x 3.5, where HRindex = HRmax/HRrest) was accurate for tracking changes in VO 2max following 8-weeks of endurance training among collegiate female soccer players. Predicted VO 2max via the HRindex Method …