{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,14]],"date-time":"2026-08-14T05:28:50Z","timestamp":1786685330660,"version":"build-2736575974"},"reference-count":58,"publisher":"Wiley","issue":"15","license":[{"start":{"date-parts":[[2026,8,9]],"date-time":"2026-08-09T00:00:00Z","timestamp":1786233600000},"content-version":"vor","delay-in-days":8,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,8,1]],"date-time":"2026-08-01T00:00:00Z","timestamp":1785542400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["physoc.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Physiological Reports"],"published-print":{"date-parts":[[2026,8]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Investigate the relationship between muscle oxidative capacity, indices of O\n                    <jats:sub>2<\/jats:sub>\n                    metabolism (maximal capacity and sustainable steady state), and severe domain performance in highly trained female middle\u2010distance runners. Incremental treadmill test determined maximal oxygen uptake (V\u0307O\n                    <jats:sub>2max<\/jats:sub>\n                    ) and lactate turn point (LTP). Critical speed (CS) was calculated from historical race and training data. Time\u2010to\u2010exhaustion (TTE) trials were run at a speed predicted to elicit exhaustion in 4\u2009min. Muscle oxidative capacity (\n                    <jats:italic>rectus femoris<\/jats:italic>\n                    ) was measured via muscle oxygen uptake (mV\u0307O\n                    <jats:sub>2<\/jats:sub>\n                    ) from near infrared spectroscopy (NIRS) deoxygenation slopes during intermittent arterial cuff occlusions (8\u2009\u00d7\u20095\u2009s ON\/5\u2009s OFF) following light exercise. Slopes were fit to a mono\u2010exponential model to calculate recovery rate (\n                    <jats:italic>k<\/jats:italic>\n                    ). Muscle oxidative capacity was highly correlated to V\u0307O\n                    <jats:sub>2max<\/jats:sub>\n                    (\n                    <jats:italic>r<\/jats:italic>\n                    \u2009=\u20090.71,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.002), LTP (\n                    <jats:italic>r<\/jats:italic>\n                    \u2009=\u20090.67,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.005), and estimated CS (\n                    <jats:italic>r<\/jats:italic>\n                    \u2009=\u20090.66,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.005). However, muscle oxidative capacity was not correlated to TTE performance (\n                    <jats:italic>r<\/jats:italic>\n                    \u2009=\u20090.13,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.622). NIRS\u2010derived muscle oxidative capacity is strongly associated with maximal and sustainable oxidative metabolic rates in highly trained female runners but appears independent of the finite energy capacity required during a severe\u2010domain performance.\n                  <\/jats:p>","DOI":"10.14814\/phy2.71047","type":"journal-article","created":{"date-parts":[[2026,8,10]],"date-time":"2026-08-10T06:06:48Z","timestamp":1786342008000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Near infrared spectroscopy\u2010derived muscle oxidative capacity correlates to oxidative metabolic predictors of performance in highly trained female middle\u2010distance runners"],"prefix":"10.14814","volume":"14","author":[{"given":"Mira I.","family":"Schoeberlein","sequence":"first","affiliation":[{"name":"Oregon Performance Research Laboratory, Department of Human Physiology University of Oregon  Eugene Oregon 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