Prediction of maximal heart rate percent during constant intensity efforts on trained subjects

25 healthy males, divided into a trained group (n=10, >3 training sessions per week) and a moderately trained group (n=15, ≤3 sessions per week). Mean age 25 ± 7 years, weight 70 ± 11 kg, VO2max 55 ± 8 ml·kg–1·min–1.

5 tests with a gradual increase in speed of 1 km·h–1 every 2 min and 4 constant speed tests at 60%, 70%, 80% and 90% VO2max, performed in randomized order.

Relationship between %HRmax and %vVO2max to predict %HRmaxsurrogate