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Interstitial K+ in human skeletal muscle during and after dynamic graded exercise determined by microdialysis
Abstract
Interstitial K+ concentrations were measured during one-legged knee-extensor exercise by use of microdialysis with probes inserted in the vastus lateralis muscle of the subjects. K+ in the dialysate was measured either by flame photometry or a K+-sensitive electrode placed in the perfusion outlet. The correction for fractional K+ recovery was based on the assumption of identical fractional thallium loss. The interstitial K+ was 4.19 ± 0.09 mM at rest and increased to 6.17 ± 0.19, 7.48 ± 1.18, and 9.04 ± 0.74 mM at 10, 30, and 50 W exercise, respectively. The individual probes demonstrated large variations in interstitial K+, and values >10 mM were obtained. The observed interstitial K+ was markedly higher than previously found for venous K+ concentrations at similar work intensities. The present data support a potential role for interstitial K+ in regulation of blood flow and development of fatigue.
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Maximal perfusion of skeletal muscle in man.
Andersen, P., & Saltin, B. (1985) · The Journal of Physiology · doi:10.1113/jphysiol.1985.sp015794 · Cited by 1,250
Cited by
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Allen, D. G., Lamb, G. D., & Westerblad, H. (2008) · Physiological Reviews · doi:10.1152/physrev.00015.2007 · Cited by 2,495
Repeated-Sprint Ability – Part I: Factors Contributing to Fatigue
Girard, O., Mendez-Villanueva, A., & Bishop, D. (2011) · Sports Medicine · doi:10.2165/11590550-000000000-00000 · Cited by 916
Dynamics and Consequences of Potassium Shifts in Skeletal Muscle and Heart During Exercise
Sejersted, O. M., & Sjøgaard, G. (2000) · Physiological Reviews · doi:10.1152/physrev.2000.80.4.1411 · Cited by 490
Cerebral perturbations provoked by prolonged exercise
Nybo, L., & Secher, N. H. (2004) · Progress in Neurobiology · doi:10.1016/j.pneurobio.2004.03.005 · Cited by 398
McKenna, M. J., Medved, I., Goodman, C. A., Brown, M. J., Bjorksten, A. R., Murphy, K. T., Petersen, A. C., Sostaric, S., & Gong, X. (2006) · The Journal of Physiology · doi:10.1113/jphysiol.2006.115352 · Cited by 265
Metadata
- Authors
- Juel, C., Pilegaard, H., Nielsen, J. J., & Bangsbo, J.
- Venue
- American Journal of Physiology-Regulatory, Integrative and Comparative Physiology
- Publisher
- American Physiological Society
- Published
- 2000-02-01
- Volume
- 278
- Issue
- 2
- Pages
- R400-R406
- ISSN
- 0363-6119 (ISSN-L)
- 1522-1490
- OpenAlex
- W2183899409
- Cited by
- 191
- References
- 1
- FWCI
- 18.09
- Type
- journal article
- Language
- en
- Open access
- closed
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- The paper
- Juel, C., Pilegaard, H., Nielsen, J. J., & Bangsbo, J. (2000). Interstitial K+ in human skeletal muscle during and after dynamic graded exercise determined by microdialysis. American Journal of Physiology-Regulatory, Integrative and Comparative Physiology. https://doi.org/10.1152/ajpregu.2000.278.2.r400
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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