Excess postexercise oxygen consumption decreases with swimming duration in a labriform fish: Integrating aerobic and anaerobic metabolism across time

Purpose: To evaluate the reliability of calculating gross efficiency (GE) conventionally and using a back extrapolation (BE) method during high-intensity exercise (HIE). Methods: A total of 12 trained participants completed 2 HIE bouts (P1 = 4 min at 80% maximal aerobic power [MAP]; P2 = 4 min at 100%MAP). GE was calculated conventionally in the last 3 minutes of submaximal (50%MAP) cycling bouts performed before and after HIE (Pre50%MAP and Post50%MAP). To calculate GE using BE (BGE), a linear regression of GE submaximal values post-HIE were back extrapolated to the end of the HIE bout. Results: BGE was significantly correlated with Post50%MAP GE in P1 (r = .63; P = .01) and in P2 (r = .85; P = .002). Reliability data for P1 and P2 BGE demonstrate a mean coefficient of variation of 7.8% and 9.8% with limits of agreement of 4.3% and 4.5% in relative GE units, respectively. P2 BGE was significantly lower than P2 Post50%MAP GE (18.1% [1.6%] vs 20.3% [1.7%]; P = .01). Using a declining GE from the BE method, there was a 44% greater anaerobic contribution compared with assuming a constant GE during 4-minute HIE at 100%MAP. Conclusion: HIE acutely reduced BGE at 100%MAP. A greater anaerobic contribution to exercise as well as excess postexercise oxygen consumption at 100%MAP may contribute to this decline in efficiency. The BE method may be a reliable and valid tool in both estimating GE during HIE and calculating aerobic and anaerobic contributions.

Download Full-text

Platelet Metabolism during the Interiorization of Two Different Types of Particulate Matter

Thrombosis and Haemostasis ◽

10.1055/s-0038-1649365 ◽

1972 ◽

Vol 27 (02) ◽

pp. 263-271 ◽

Cited By ~ 2

Author(s):

I. A. Cooper ◽

P Cochrane ◽

B. G. Firkin ◽

K. J. Pinkard

Keyword(s):

Particulate Matter ◽

Polymorphonuclear Leukocyte ◽

Anaerobic Metabolism ◽

Human Platelets ◽

Metabolic Changes ◽

Polystyrene Latex ◽

Considerable Time ◽

Difference Of Opinion ◽

Different Types ◽

Aerobic And Anaerobic

SummaryIt has been suggested that human platelets possess the ability to phagocytose particulate matter similar to the polymorphonuclear leukocyte. However some difference of opinion has arisen regarding this contention, particularly as differences have been demonstrated with regard to the observed metabolic changes occurring in platelets related to such a process.The experiments reported in this paper were designed to observe the aerobic and anaerobic metabolism in human platelets during and following interiorization of two different particles, viz. polystyrene latex and thorotrast. The results of these experiments show a marked difference between both types of particles with regard to observable metabolic changes despite the rapid interiorization of both types of material. Some alteration occurs in both aerobic and anaerobic metabolism a considerable time after interiorization of latex, whereas no alteration could be demonstrated after interiorization of thorotrast. It is suggested that the interiorization of particulate matter is by some process other than phagocytosis and that observed metabolic changes related to latex may be due to a release reaction.

Download Full-text

A model-driven quantitative metabolomics analysis of aerobic and anaerobic metabolism inE. coliK-12 MG1655 that is biochemically and thermodynamically consistent

Biotechnology and Bioengineering ◽

10.1002/bit.25133 ◽

2013 ◽

Vol 111 (4) ◽

pp. 803-815 ◽

Cited By ~ 40

Author(s):

Douglas McCloskey ◽

Jon A. Gangoiti ◽

Zachary A. King ◽

Robert K. Naviaux ◽

Bruce A. Barshop ◽

...

Keyword(s):

Anaerobic Metabolism ◽

Model Driven ◽

Quantitative Metabolomics ◽

Aerobic And Anaerobic ◽

Metabolomics Analysis

Download Full-text

Ontogenetic effects on aerobic and anaerobic metabolism during jumping in the American locust, Schistocerca americana

Journal of Experimental Biology ◽

10.1242/jeb.01747 ◽

2005 ◽

Vol 208 (15) ◽

pp. 3003-3012 ◽

Cited By ~ 32

Author(s):

S. D. Kirkton

Keyword(s):

Anaerobic Metabolism ◽

Schistocerca Americana ◽

Ontogenetic Effects ◽

Aerobic And Anaerobic

Download Full-text

Oxygen consumption of desert pupfish at ecologically relevant temperatures suggests a significant role for anaerobic metabolism

Journal of Comparative Physiology B ◽

10.1007/s00360-018-1174-1 ◽

2018 ◽

Vol 188 (5) ◽

pp. 821-830 ◽

Cited By ~ 3

Author(s):

Matt Heuton ◽

Luis Ayala ◽

Aldo Morante ◽

Kyle Dayton ◽

Alexander C. Jones ◽

...

Keyword(s):

Oxygen Consumption ◽

Significant Role ◽

Anaerobic Metabolism ◽

Desert Pupfish

Download Full-text

Aerobic and anaerobic metabolism for the zebrafish, Danio rerio, reared under normoxic and hypoxic conditions and exposed to acute hypoxia during development

Brazilian Journal of Biology ◽

10.1590/s1519-69842010000200027 ◽

2010 ◽

Vol 70 (2) ◽

pp. 425-434 ◽

Cited By ~ 40

Author(s):

WR Barrionuevo ◽

MN Fernandes ◽

O Rocha

Keyword(s):

Danio Rerio ◽

Anaerobic Metabolism ◽

Developmental Stages ◽

Acute Hypoxia ◽

Lactate Concentration ◽

Growth Delay ◽

Hypoxic Conditions ◽

Aerobic And Anaerobic ◽

Mild Hypoxia

In order to verify the influence of chronic and acute ambient oxygen levels from egg to adult stage of the zebrafish, in vivo oxygen consumption (MO2), critical tensions of oxygen (Pcrit), heart rate (fH) and total body lactate concentration (Lc) were determined for Danio rerio (Hamilton, 1822) raised at 28 °C under normoxic (7.5 mgO2.L-1 or 80 mm.Hg-1) and hypoxic conditions (4.3 mgO2.L-1) and exposed to acute hypoxia during different developmental stages. Our findings confirmed that very early stages do not respond effectively to ambient acute hypoxia. However, after the stage corresponding to the age of 30 days, D. rerio was able to respond to acute hypoxia through effective physiological mechanisms involving aerobic and anaerobic metabolism. Such responses were more efficient for the fishes reared under hypoxia which showed that D. rerio survival capability increased during acclimation to mild hypoxia. Measurements of body mass and length showed that moderate hypoxia did not affect growth significantly until the fish reached the stage of 60 days. Moreover, a growth delay was verified for the hypoxic-reared animals. Also, the D. rerio eggs-to-larvae survival varied from 87.7 to 62.4% in animals reared under normoxia and mild hypoxia, respectively. However, the surviving animals raised under moderated hypoxia showed a better aptitude to regulate aerobic and anaerobic capacities when exposed to acute hypoxia.

Download Full-text