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Leg muscle pH following sprint running

Costill, David L., Barnett, Anthony, Sharp, Rick L., Fink, William J. and Katz, Abram L. 1983, Leg muscle pH following sprint running, Medicine and science in sports & exercise, vol. 15, no. 4, pp. 325-329.

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Title Leg muscle pH following sprint running
Author(s) Costill, David L.
Barnett, Anthony
Sharp, Rick L.
Fink, William J.
Katz, Abram L.
Journal name Medicine and science in sports & exercise
Volume number 15
Issue number 4
Start page 325
End page 329
Total pages 5
Publisher Lippincott Williams & Wilkins
Place of publication Philadelphia, Pennsylvania
Publication date 1983
ISSN 0195-9131
1530-0315
Keyword(s) lactic acid derivative
metabolism
oxygen consumption
pH
running
Summary In an effort to compare the disturbances in leg muscle pH during sprint running, muscle biopsies were obtained from the gastrocnemius and vastus lateralis muscles of six healthy men (three endurance-trained and three nonendurance-trained) before and after a treadmill sprint run (TSR) to fatigue (54-105 s) at roughly 125% of their aerobic capacities. Following the TSR, repeated blood samples were taken from a hand vein and later analyzed for pH, PCO2, and lactic acid (HLa). The muscle specimens were analyzed in duplicate for pH and HLa. Resting-muscle pH was 7.03 +/- 0.02 (means +/- SE) and 7.04 +/- 0.01 for the gastrocnemius and vastus lateralis muscles, respectively. At the termination of the TSR, the pH in these muscles was 6.88 +/- 0.05 and 6.86 +/- 0.03, respectively. After a 400-m timed run on the track, the pH in the gastrocnemius of four of the subjects averaged 6.63 +/- 0.03, while blood pH and HLa were 7.10 +/- 0.03 and 12.3 mM, respectively. Although no differences in pH and HLa were observed between the vastus lateralis and gastrocnemius muscles at the end of the treadmill trial, it is speculated that the lesser disturbance in acid-base balance seen in endurance performers may have been due to a lesser production of metabolites in their running musculature when compared to nonendurance performers.
Language eng
Field of Research 110602 Exercise Physiology
Socio Economic Objective 970111 Expanding Knowledge in the Medical and Health Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©1983, Lippincott Williams & Wilkins
Persistent URL http://hdl.handle.net/10536/DRO/DU:30058737

Document type: Journal Article
Collection: School of Exercise and Nutrition Sciences
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Created: Tue, 03 Dec 2013, 13:49:12 EST by Anthony Barnett

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