Methods of prescribing relative exercise intensity: physiological and practical considerations

Area of Science:

• Exercise Physiology
• Sports Science
• Human Performance

Background:

• Relative exercise intensity prescription is crucial for equivalent training stress across individuals.
• Traditional methods like %VO2max and %HRmax may not ensure equivalent physiological stress.
• Metabolic thresholds (AerT, AnT) offer alternative intensity prescription strategies.

Purpose of the Study:

• To compare the physiological and practical implications of different relative exercise intensity prescription methods.
• To evaluate methods including %VO2max, %HRmax, VO2R, HRR, AerT, and AnT.
• To inform optimal exercise prescription for research and training.

Main Methods:

• Review of literature comparing various relative exercise intensity prescription methods.
• Analysis of physiological responses (e.g., blood lactate) and practical considerations.
• Consideration of interindividual variability in response to different prescription methods.

Main Results:

• Fixed %VO2max or %HRmax can lead to significant interindividual variation in physiological stress.
• %VO2R and %HRR also show interindividual variation.
• Threshold-based prescription (AerT, AnT) theoretically offers more homogenous training stimuli but requires further demonstration.
• Threshold determination presents practical challenges including testing burden and measurement variability.

Conclusions:

• Each method of relative exercise intensity prescription has unique advantages and disadvantages.
• The optimal method depends on factors like exercise intensity, participant numbers, and individual characteristics.
• Careful consideration of limitations and reporting individual responses are essential for accurate interpretation and future research.