Factors associated with perceived exertion and estimated time limit at lactate threshold

Area of Science:

• Exercise Physiology
• Sports Science
• Human Performance

Background:

• Subjective measures like perceived exertion and estimated time limit are crucial for understanding exercise intensity.
• The lactate threshold is a key physiological marker for endurance performance.
• Predicting these subjective responses at the lactate threshold can optimize training and performance.

Purpose of the Study:

• To identify key predictors of perceived exertion and estimated time limit at the velocity of the lactate threshold.
• To explore the influence of physiological, psychological, nutritional, and individual factors on these subjective measures.
• To enhance the understanding of perceptual responses during high-intensity exercise.

Main Methods:

• Developed multiple regression equations using physiological, psychological, nutritional, and individual parameters.
• Collected independent variables before or during an incremental running field test.
• Analyzed data from 94 regional to national level athletes (runners, sprinters, handball players).

Main Results:

• Rating of Perceived Exertion and Estimated Time Limit at lactate threshold were primarily predicted by performance relative to maximal aerobic velocity.
• Secondary perceptual predictors included various factors, but notably excluded psychological factors.
• Performance-based metrics were the strongest determinants of subjective exercise intensity at the lactate threshold.

Conclusions:

• Performance metrics, particularly as a percentage of maximal aerobic velocity, are dominant predictors of perceived exertion and estimated time limit at the lactate threshold.
• Non-psychological factors play a significant role in modulating these subjective exercise experiences.
• This research provides valuable insights for coaches and athletes in interpreting and utilizing subjective feedback during training and competition.