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Effect of reduced training volume on cardiac function, VO2 max, and running performance
The Journal of Sports Medicine and Physical Fitness
|September 1, 1989
Summary
Reducing training mileage and increasing exercise intensity improved a runner's 10,000m performance time. This study shows performance can be maintained with less mileage and higher intensity interval training.
Area of Science:
- Sports Science
- Exercise Physiology
- Running Performance
Background:
- Veteran long-distance runners often maintain high training volumes.
- Optimizing training load is crucial for peak performance and injury prevention.
Purpose of the Study:
- To investigate the physiological adaptations to reduced training mileage and increased intensity in a long-distance runner.
- To assess the impact on performance metrics and cardiovascular function.
Main Methods:
- A veteran long-distance runner reduced weekly mileage from 75.8 to 42.5 miles over 8 weeks.
- High-intensity interval training was incorporated twice weekly.
- Physiological variables including stroke volume, cardiac output, and VO2max were monitored.
Main Results:
- Performance time in a 10,000m run improved by 10 seconds.
- Maximum oxygen uptake (VO2max) and heart contractility showed a decrease.
- Ventilation threshold remained a key indicator of endurance capacity.
Conclusions:
- Distance running performance can be enhanced by reducing training volume and increasing exercise intensity.
- Physiological trade-offs may occur, such as decreased VO2max, despite performance gains.
- This training modification offers a viable strategy for maintaining competitive running performance.