The effect of pH on fatigue during submaximal isometric contractions of the human calf muscle
| Autor: | Paul W. M Marshall, Simon Green, David S. Kennedy, Jason C. Siegler, Niels-Peter Brøchner Nielsen, Mathias K Pouslen |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Adult
Male medicine.medical_specialty Physiology Stimulation Acid–base homeostasis Isometric exercise Ammonium Chloride chemistry.chemical_compound Isometric Contraction Physiology (medical) Internal medicine Humans Medicine Orthopedics and Sports Medicine Muscle Skeletal Tibial nerve Leg Sodium bicarbonate Muscle fatigue business.industry Public Health Environmental and Occupational Health General Medicine Hydrogen-Ion Concentration Peripheral Sodium Bicarbonate chemistry Calf muscle Muscle Fatigue Physical therapy Cardiology Tibial Nerve business |
| Zdroj: | Siegler, J C, Marshall, P, Poulsen, M K, Nielsen, N-P B, Kennedy, D & Green, S 2015, ' The effect of pH on fatigue during submaximal isometric contractions of the human calf muscle ', European Journal of Applied Physiology, vol. 115, no. 3, pp. 565-577 . https://doi.org/10.1007/s00421-014-3027-2 |
| DOI: | 10.1007/s00421-014-3027-2 |
| Popis: | This study examined whether changes in pH throughout the physiologic range would have a differential effect on central and peripheral factors associated with fatigue and force production during submaximal lower limb isometric exercise to task failure. Eight males completed three experimental trials [0.2 g kg−1 ammonia chloride (ACD); 0.3 g kg−1 calcium carbonate (PLA); or 0.3 g kg−1 sodium bicarbonate (ALK)], each consisting of submaximal calf contractions at 55 % of maximal voluntary contraction (MVC) to task failure. Every minute of the task subjects performed an MVC, coupled with stimulation of the tibial nerve during and immediately post MVC. Time to task failure was not different between trials (ACD 531 ± 166 s, PLA 592 ± 163 s, ALK 596 ± 150 s; p = 0.31). MVC force in all trials declined 29 % from the start of exercise to the fifth minute (mean decline of 371 ± 26 N; p |
| Databáze: | OpenAIRE |
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