PMID: 9433798Jan 20, 1998Paper

EPOC and the energetics of brief locomotor activity in Mus domesticus

The Journal of Experimental Zoology
E J Baker, Todd T Gleeson

Abstract

Excess post-exercise oxygen consumption (EPOC) is normally not considered in determinations of the metabolic cost of activity. This approach overlooks an important energetic cost that an animal incurs as a result of activity. To examine the importance of EPOC, we determined how the energetic cost of locomotion was affected by activity of short duration and high intensity. Mice were run at maximum speed on a treadmill while enclosed in an open-flow respirometry system. After sprinting for 5, 15, 30, or 60 sec, each mouse was allowed to recover while remaining enclosed in the respirometry chamber. Exercise oxygen consumption (EOC), the volume of oxygen consumed during the exercise, increased linearly with sprint duration. EPOC was determined as the volume of oxygen consumed after exercise ended until rest was reached. EPOC volumes were found to be constant following 5-60 sec of activity and accounted for > or = 90% of the total metabolic cost. The average EPOC volume of all treatments was 0.76 +/- 0.456 ml O2.gm-1. The net cost of activity (Cact), which considers both EOC and EPOC, decreased as sprint duration increased and varied between 500 ml O2.g-1.km-1 for 5 sec to 30 ml O2.g-1.km-1 for 60 sec of activity. The values for Cac...Continue Reading

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Citations

Jan 7, 2010·Canadian Journal of Physiology and Pharmacology·Pei San LewTooru M Mizuno
Jun 17, 2005·Nutrition & Metabolism·Christopher B Scott
Dec 25, 2003·The Proceedings of the Nutrition Society·John R Speakman, Colin Selman
Feb 28, 2017·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Ian A BouyoucosEdward J Brooks
Mar 14, 2018·The Journal of Experimental Biology·Simon P LailvauxJerry F Husak
Apr 11, 2006·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Christopher B Scott
Apr 5, 2002·Medicine and Science in Sports and Exercise·M Kathleen Thornton, Jeffery A Potteiger
Nov 7, 2019·Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology·Gerardo A CorderoJon C Svendsen
Oct 24, 2001·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·T V HancockT T Gleeson
Sep 5, 2002·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Todd T Gleeson, Thomas V Hancock
Oct 9, 2004·The Journal of Experimental Biology·Mark A ChappellFernando R Gomes

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