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Updated: Apr 27, 2026
Determining the Contribution of the Energy Systems During Exercise
Published on: March 20, 2012
Mathematical simulation of energy expenditure and recovery during sprint cross-country skiing
John F Moxnes1, Eldbjørg Dirdal Moxnes2
1Protection and Societal Security Division, Norwegian Defence Research Establishment, Kjeller, Norway.
Purpose:
A cross-country sprint competition relies on maximal effort durations of 3-4 minutes. Significant anaerobic energy contribution is expected. Anaerobic energy contribution has been estimated in different sports to date from the accumulated O2 deficit. However, the O2-deficit model can be questioned. We investigate anaerobic energy contribution by applying other methods than the O2 deficit.
Methods:
Theoretical model development.
Results:
For sprint cross-country competitions, the anaerobic energy contribution was 20%-25% independent of the employed mathematical model. Recovery times of a minimum 20 minutes were found to be required after sprint races to be sure that the performance in subsequent heats was not influenced.
Conclusion:
The O2-deficit model gave anaerobic energy results in agreement with other models from the literature. Recovery times of a minimum 20 minutes were found to be required after sprint races to be sure that the performance in subsequent heats was not influenced.
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