Physiological Patterns Of The Exercise Energetical Cost

Introduction
Assessment of energetical cost of exercise may be carry out on the basis of patterns coupled physiological functions, such as pulse rate, level of lung ventilation, non-metabolic excess CO2, etc [1, 2].

Methods
26 well-trained male swimmers, middle-distance runners and speed skaters (ages 18-24, height 162-186 cm, body mass 62-83 kg), ranging from club to international level, volunteered to take part in the study. All subjects performed 5 all-out tests - at 10, 30, 60, 120 and 360 second duration without a preliminary warm-up. Heart rate data were collected using monitor Polar S-610. Gas volume, O2 and CO2 fractions were measured in exhaled air using Beckman MMS monitor system.

Results
Changes of the work pulse sum above the rest level, recovery pulse sum above the rest level, and exercise pulse cost as a function of the limited work duration are shown in Fig. 1A. Similar dependencies from exercise parameters demonstrate sums of lung ventilation and excess CO2. Physiological patterns of the exercise energetical cost closely correlated with the values of total O2-demand (Fig. 1B).

Conclusion
The pulse sums parameters derived based on the study of pulse rate, lung ventilation and excess CO2 kinetics during work and recovery provide invaluable information about exercise energy expenditures and can be used as objective criteria for quantifying physical exercise.

References
[1]. Wasserman K. et. al. Principals Of Exercise Testing and Interpretation (1999). Philadelphia, Lippincott Williams & Wilkins.
[2]. Volkov N.I., Popov O.I., Samborsky A.G. (2003) Human Physiology, Vol. 29 (3): 98-103.

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