Constant relationships between force, phosphate concentration, and pH in muscles with differential fatigability

M. W. Weiner, R. S. Moussavi, A. J. Baker, M. D. Boska, R. G. Miller

Research output: Contribution to journalArticle

48 Scopus citations

Abstract

We examined the relationships between muscle force and both phosphate and hydrogen ion concentrations in muscles with differential fatigability and in different types of exercise. We measured force and31phosphorus nuclear magnetic resonance spectra from the tibialis anterior (a slow-contracting, fatigue resistant, postural leg muscle) during a sustained maximum contraction (anaerobic exercise) and during intermittent contractions (aerobic exercise). We observed similar relationships between the decline in muscle force during fatigue and changes in both phosphate and hydrogen ion concentrations during both aerobic and anaerobic exercise in tibialis anterior. Furthermore, these relationships were similar to those previously observed in the adductor pollicis. The demonstration of constant relationships between muscle contraction force and metabolism under different exercise conditions and in muscles of different function supports the view that both phosphate and hydrogen ions are important regulatory factors in the fatigue of human muscle.

Original languageEnglish (US)
Pages (from-to)1888-1893
Number of pages6
JournalNeurology
Volume40
Issue number12
DOIs
StatePublished - Dec 1990

ASJC Scopus subject areas

  • Clinical Neurology

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    Weiner, M. W., Moussavi, R. S., Baker, A. J., Boska, M. D., & Miller, R. G. (1990). Constant relationships between force, phosphate concentration, and pH in muscles with differential fatigability. Neurology, 40(12), 1888-1893. https://doi.org/10.1212/wnl.40.12.1888