Validity and reliability of the session-RPE method for quantifying training load in karate athletes

Area of Science:

• Sports Science
• Exercise Physiology
• Martial Arts Training

Background:

• The session rating of perceived exertion (sRPE) is a subjective measure of training intensity.
• Validating sRPE against objective physiological markers is crucial for accurate training load assessment in athletes.
• Karate training involves diverse modes, requiring reliable methods to quantify internal load.

Purpose of the Study:

• To assess the construct validity and reliability of the sRPE method in elite karate athletes.
• To examine the relationship between RPE, heart rate (HR), and blood lactate ([La --]).
• To compare sRPE with established HR-based training load methods (Banister's and Edwards's).

Main Methods:

• Eighteen elite karate athletes (10 men, 8 women) participated in eight training sessions.
• Measurements included session rating of perceived exertion (sRPE), heart rate (HR), and blood lactate ([La --]).
• Training comprised tactical-technical, technical-development, and randori modes.

Main Results:

• Strong significant correlations were found between RPE and physiological parameters (HR: r = 0.75; [La --]: r = 0.62).
• sRPE demonstrated significant correlations with Banister's and Edwards's methods (r = 0.65–0.95).
• The sRPE method exhibited high reliability across training sessions (Cronbach's α = 0.81).

Conclusions:

• The sRPE method is a valid tool for quantifying internal training load in karate.
• sRPE provides a reliable measure of training intensity for karate practitioners.
• This study supports the use of sRPE in monitoring and managing training loads in karate athletes.