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Determining physiologic variables for changes in 800-m running and 800-m ski ergometer performance.

Lars Erik Gjerløw^1,2, Arnstein Sunde³, Eva Maria Støa³

¹Department of Sports, Physical Education and Outdoor Studies, University of South-Eastern Norway, Bø, Norway. lars.e.gjerlow@usn.no.

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|April 18, 2025

Summary

Improving maximal oxygen uptake, work economy, and sprint speed enhances middle-distance running and ski ergometer performance. These physiological factors are key to boosting 800m time trial results in athletes.

Keywords:

Anaerobic capacity Anaerobic sprint reserve Maximal accumulated oxygen deficiency Maximal aerobic speed Maximal sprint speed Middle-distance performance

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Area of Science:

Sports Science
Exercise Physiology
Biomechanical Performance Analysis

Background:

Understanding the physiological determinants of middle-distance performance is crucial for optimizing training.
Previous research has explored various factors, but specific associations with 800m time trial changes require further investigation.

Purpose of the Study:

To investigate the associations between changes in 800m time trial performance and key physiological variables over a seven-week period.
To differentiate these associations between running and ski ergometer double poling disciplines.

Main Methods:

Forty-six athletes (recreational to elite) underwent pre- and post-intervention testing.
Tests included 800m time trial, maximal sprint speed (MSS/MSP), peak oxygen uptake (VO2peak), oxygen cost (CR/CDP), time to exhaustion (TTE), maximal accumulated oxygen deficit (MAOD), and maximal strength (1RM).

Main Results:

For ski ergometer, maximal aerobic power (MAP) and maximal strength changes moderately correlated with 800m time trial changes (r = -0.51).
For running, maximal aerobic speed (MAS) and sprint speed equation changes strongly correlated with 800m time trial changes (r = -0.71 to -0.73).
VO2peak was the primary driver of MAS improvements in running, while oxygen cost of double poling (CDP) was key for MAP improvements in ski ergometer.

Conclusions:

Focusing training on enhancing maximal oxygen uptake (VO2max), work economy, and maximal sprint speed is recommended for improving middle-distance running and ski sprinting performance.
Changes in TTE and MAOD did not correlate with 800m time trial performance improvements in either discipline.