{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T12:39:09Z","timestamp":1760013549049},"reference-count":48,"publisher":"The Company of Biologists","issue":"20","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2008,10,15]]},"abstract":"<jats:title>SUMMARY<\/jats:title><jats:p>Phosphocreatine (PCr) was reduced to equivalent levels in carp white muscle by high-intensity exhaustive exercise and exposure to hypoxia at 15\u00b0C and 25\u00b0C in order to assess the influence of intracellular pH(pHi), temperature and lactate levels on PCr recovery in vivo. High-intensity exercise resulted in a significantly lower pHi compared with hypoxia exposure and the rate of PCr depletion and tissue acidification during hypoxia exposure was significantly higher in carp held at 25\u00b0C compared with those at 15\u00b0C. During recovery, PCr and pHi returned towards normoxia\/resting levels at a faster rate following hypoxia exposure than after exercise. The lower pHi in exercised carp caused a greater perturbation to cellular energy status(assessed as the free energy of ATP hydrolysis; \u0394fG\u2032) and resulted in a higher [ATP]\/[ADPfree] ratio, which may limit mitochondrial ATP production and contribute to the slower recovery from exercise compared with recovery from hypoxia exposure. Rates of recovery from exercise and hypoxia exposure were not affected by acclimation temperature (15 and 25\u00b0C), suggesting that the processes involved in acclimation compensate for the Q10 effects of temperature on metabolic processes. Finally, using a dual 31P-NMR and 1H-NMR analysis technique, we demonstrated that the greater tissue acidification observed after high-intensity exercise compared with hypoxia exposure occurred at similar white muscle lactate concentrations.<\/jats:p>","DOI":"10.1242\/jeb.019257","type":"journal-article","created":{"date-parts":[[2008,10,7]],"date-time":"2008-10-07T15:33:08Z","timestamp":1223393588000},"page":"3237-3248","source":"Crossref","is-referenced-by-count":16,"title":["Differential recovery from exercise and hypoxia exposure measured using 31P- and 1H-NMR in white muscle of the common carp<i>Cyprinus carpio<\/i>"],"prefix":"10.1242","volume":"211","author":[{"given":"Troy M.","family":"Hallman","sequence":"first","affiliation":[{"name":"Department of Zoology, The University of British Columbia, 6270 University Boulevard, Vancouver, BC, Canada V6T 1Z4"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anibal C.","family":"Rojas-Vargas","sequence":"additional","affiliation":[{"name":"Department of Zoology, The University of British Columbia, 6270 University Boulevard, Vancouver, BC, Canada V6T 1Z4"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"David R.","family":"Jones","sequence":"additional","affiliation":[{"name":"Department of Zoology, The University of British Columbia, 6270 University Boulevard, Vancouver, BC, Canada V6T 1Z4"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jeffrey G.","family":"Richards","sequence":"additional","affiliation":[{"name":"Department of Zoology, The University of British Columbia, 6270 University Boulevard, Vancouver, BC, Canada V6T 1Z4"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"237","reference":[{"key":"2021042511302597000_REF1","doi-asserted-by":"crossref","unstructured":"Bickler, P. and Buck, L. 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