Does the Friel Anaerobic Threshold Test Accurately Detect Heart Rate Deflection in Trained Cyclists?

Area of Science:

• Exercise Physiology
• Sports Science
• Cycling Performance Analysis

Background:

• The Friel Anaerobic Threshold Test (FATT) is commonly used to determine anaerobic threshold (AT).
• The FATT suggests AT occurs near the heart rate deflection point (HRDP) at a rating of perceived exertion (RPE) of 17.

Purpose of the Study:

• To determine if the FATT can accurately identify the HRDP in cyclists.
• To examine differences in heart rate at the ventilatory threshold (HRVT) between RPE 17 and other RPEs.
• To assess the influence of riding position (hoods vs. aero) on performance metrics.

Main Methods:

• Fourteen male cyclists completed the FATT twice within a week.
• Subjects cycled in either hoods or aero position during the tests.

Main Results:

• The FATT successfully determined HRDP in the hoods position but not the aero position.
• No significant difference in HRVT was found between hoods and aero positions.
• Heart rate at RPE 15 more accurately reflected HRVT than RPE 17.
• Correlation between HR at RPE 17 and HRVT was low and non-significant for both positions.

Conclusions:

• The FATT can determine HRDP in trained cyclists, particularly in their preferred riding position.
• Using RPE 15 is recommended over RPE 17 for estimating HRVT during the FATT.
• Riding position may influence HRDP identification during the FATT.