{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,5]],"date-time":"2026-05-05T02:09:32Z","timestamp":1777946972903,"version":"3.51.4"},"reference-count":0,"publisher":"S. Karger AG","license":[{"start":{"date-parts":[[2009,1,15]],"date-time":"2009-01-15T00:00:00Z","timestamp":1231977600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/karger.com\/pages\/terms-and-conditions"},{"start":{"date-parts":[[2009,1,15]],"date-time":"2009-01-15T00:00:00Z","timestamp":1231977600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/karger.com\/pages\/terms-and-conditions"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Respiration"],"abstract":"<jats:p>38 healthy male volunteers were administered a graded exercise test during which selected respiratory gas exchange variables were monitored. In each case, two distinct ventilatory thresholds were observed. The first threshold was detected by the power output at which the V&lt;sub&gt;E&lt;\/sub&gt;\/VO&lt;sub&gt;2&lt;\/sub&gt; ratio and FEO&lt;sub&gt;2&lt;\/sub&gt; reached a minimum. The mathematical relationship between these two variables was such that at power outputs above this threshold, hyperventilation with respect to oxygen consumption had to occur. The second threshold was detected by the power output at which the V&lt;sub&gt;E&lt;\/sub&gt;\/VCO&lt;sub&gt;2&lt;\/sub&gt; ratio reached a minimum and the F&lt;sub&gt;E&lt;\/sub&gt;CO&lt;sub&gt;2&lt;\/sub&gt; reached a maximum. These two variables were related in a manner such that at power outputs above this threshold, hyperventilation with respect to carbon dioxide production had to occur.<\/jats:p>","DOI":"10.1159\/000194758","type":"journal-article","created":{"date-parts":[[2009,1,26]],"date-time":"2009-01-26T09:24:49Z","timestamp":1232961889000},"page":"120-128","source":"Crossref","is-referenced-by-count":59,"title":["Ventilatory Thresholds during a Graded Exercise Test"],"prefix":"10.1159","author":[{"given":"Y.","family":"Bhambhani","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M.","family":"Singh","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"127","published-online":{"date-parts":[[2009,1,15]]},"container-title":["Respiration"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.karger.com\/Article\/Pdf\/194758","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/karger.com\/article-pdf\/doi\/10.1159\/000194758","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,5,2]],"date-time":"2026-05-02T21:15:52Z","timestamp":1777756552000},"score":1,"resource":{"primary":{"URL":"https:\/\/karger.com\/article\/doi\/10.1159\/000194758"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2009,1,15]]},"references-count":0,"URL":"https:\/\/doi.org\/10.1159\/000194758","archive":["Portico"],"relation":{},"ISSN":["0025-7931","1423-0356"],"issn-type":[{"value":"0025-7931","type":"print"},{"value":"1423-0356","type":"electronic"}],"subject":[],"published":{"date-parts":[[2009,1,15]]}}}