National-Standard Middle-Distance Runners Maintain 1500 m Time Trial Running Performance on Successive Days.

Area of Science:

• Exercise Physiology
• Sports Science
• Running Performance

Background:

• Middle-distance running performance relies on sustained high-intensity effort.
• Understanding day-to-day performance maintenance is crucial for training.
• Self-paced time trials assess maximal performance capacity.

Purpose of the Study:

• To investigate if national-standard middle-distance athletes can maintain self-paced 1500m time trial performance on successive days.
• To quantify physiological and perceptual responses during repeated time trials.

Main Methods:

• 12 national-standard middle-distance runners completed two 1500m self-paced time trials 24 hours apart.
• Internal measures (RER, VO2, lactate, HR, RPE) and external measures (speed, time) were recorded.
• Biomechanical data (step length, frequency) were collected using force transducers.

Main Results:

• Athletes maintained 1500m time trial performance on the second day without structured recovery.
• Perceived exertion was significantly higher (approx. 2.5x) on the second trial.
• Measurement error for most physiological variables was comparable to previous studies.

Conclusions:

• National-standard middle-distance specialists can replicate 1500m time trial performance on consecutive days.
• Performance maintenance occurs despite increased perceived exertion.
• No structured recovery interventions are needed to achieve this performance consistency.