Strong relationship between heart rate deflection point and ventilatory threshold in trained rowers

Area of Science:

• Sports Medicine
• Exercise Physiology
• Cardiovascular Physiology

Background:

• Assessing aerobic endurance is crucial for optimizing training in athletes.
• The ventilatory threshold (VT) is a key indicator of aerobic capacity.
• The heart rate deflection point (HRDP) is a potential noninvasive alternative for VT assessment.

Purpose of the Study:

• To evaluate the relationship between HRDP and VT in trained male rowers.
• To determine if HRDP can be used as a valid and accessible method for assessing anaerobic threshold in this population.

Main Methods:

• Eighty-nine trained male rowers underwent incremental rowing ergometer tests to exhaustion.
• HRDP and VT were independently determined by experienced observers.
• Statistical analyses correlated physiological and performance variables between HRDP and VT.

Main Results:

• Strong correlations (r = 0.79-0.96) were found between physiological and performance variables at HRDP and VT.
• Key variables like power output and oxygen uptake were not significantly different between HRDP and VT.
• HRDP was slightly, but significantly, higher than VT (174.5 vs. 172.8 bpm).

Conclusions:

• HRDP serves as a reliable and practical surrogate for VT in trained rowers.
• This finding supports the use of HRDP for accessible aerobic endurance assessment.
• HRDP can aid in monitoring training program effectiveness in rowers.