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Related Experiment Videos

Exercise and postexercise energy expenditure in growing pigs.

M P Petley1, H S Bayley

  • 1Department of Nutritional Sciences, University of Guelph, Ont., Canada.

Canadian Journal of Physiology and Pharmacology
|June 1, 1988
PubMed
Summary

Exercise significantly elevates energy expenditure in young pigs, with most heat production occurring after the activity. This prolonged energy use highlights the lasting metabolic impact of physical exertion.

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Area of Science:

  • Animal Physiology
  • Metabolic Studies
  • Exercise Science

Background:

  • Understanding the long-term metabolic effects of exercise is crucial for animal health and performance.
  • Previous research has focused on immediate energy expenditure during physical activity.

Purpose of the Study:

  • To quantify the total heat production in young pigs following a period of treadmill exercise.
  • To determine the duration and pattern of elevated energy expenditure post-exercise.

Main Methods:

  • Young pigs underwent a 2-week treadmill training regimen.
  • Gas exchange and heat production were measured using indirect calorimetry over 23 hours.
  • Compared exercised pigs with a control group.

Main Results:

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  • Exercised pigs exhibited higher total heat production (523 kJ/kg) compared to controls (433 kJ/kg).
  • Only 43% of the excess heat was dissipated during the 2-hour exercise period.
  • The remaining 57% of extra energy expenditure occurred over the subsequent 21 hours.

Conclusions:

  • Exercise-induced energy expenditure extends significantly beyond the duration of the activity itself.
  • Treadmill exercise in pigs leads to a sustained increase in metabolic rate.
  • These findings have implications for understanding energy balance and metabolism in physically active animals.