{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T03:02:15Z","timestamp":1787022135566,"version":"build-2736575974"},"reference-count":84,"publisher":"Public Library of Science (PLoS)","issue":"11","license":[{"start":{"date-parts":[[2023,11,15]],"date-time":"2023-11-15T00:00:00Z","timestamp":1700006400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100007397","name":"Univerzita Karlova v Praze","doi-asserted-by":"publisher","award":["GAUK 986120"],"award-info":[{"award-number":["GAUK 986120"]}],"id":[{"id":"10.13039\/100007397","id-type":"DOI","asserted-by":"publisher"}]},{"name":"the SVV research program","award":["SVV 2020-2022-260599"],"award-info":[{"award-number":["SVV 2020-2022-260599"]}]},{"name":"the Cooperatio Program","award":["SPOB research area"],"award-info":[{"award-number":["SPOB research area"]}]},{"name":"the Ministry of Health of the Czech Republic","award":["MH CZ-DRO; NUDZ, 00023752"],"award-info":[{"award-number":["MH CZ-DRO; NUDZ, 00023752"]}]}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS ONE"],"abstract":"<jats:sec id=\"sec001\">\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>A lack of sleep can pose a risk during military operations due to the associated decreases in physical and cognitive performance. However, fast-acting ergogenic aids, such as ammonia inhalants (AI), may temporarily mitigate those adverse effects of total sleep deprivation (TSD). Therefore, the present study aimed to investigate the acute effect of AI on cognitive and physical performance throughout 36 hours of TSD in military personnel.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sec002\">\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Eighteen male military cadets (24.1 \u00b1 3.0 y; 79.3 \u00b1 8.3 kg) performed 5 identical testing sessions during 36 hours of TSD (after 0 [0], 12 [\u201312], 24 [\u201324], and 36 [\u201336] hours of TSD), and after 8 [+8] hours of recovery sleep. During each testing session, the following assessments were conducted: Epworth sleepiness scale (ESS), simple reaction time (SRT), shooting accuracy (SA), rifle disassembling and reassembling (DAS), and countermovement jump height (JH). Heart rate (HR) was continuously monitored during the SA task, and a rating of perceived exertion (RPE) was obtained during the JH task. At each time point, tests were performed twice, either with AI or without AI as control (CON), in a counterbalanced order.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sec003\">\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>There was faster SRT (1.6%; p &lt; 0.01) without increasing the number of errors, higher JH (1.5%; p &lt; 0.01), lower RPE (9.4%; p &lt; 0.001), and higher HR (5.0%; p &lt; 0.001) after using AI compared to CON regardless of TSD. However, neither SA nor DAS were affected by AI or TSD (p &gt; 0.05). Independent of AI, the SRT was slower (3.2\u20139.3%; p &lt; 0.001) in the mornings (-24, +8) than in the evening (-12), JH was higher (3.0\u20134.7%, p &lt; 0.001) in the evenings (-12, -36) than in the mornings (0, -24, +8), and RPE was higher (20.0\u201340.1%; p &lt; 0.001) in the sleep-deprived morning (-24) than all other timepoints (0, -12, -36, +8). Furthermore, higher ESS (59.5\u2013193.4%; p &lt; 0.001) was reported at -24 and -36 than the rest of the time points (0, -12, and + 8).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sec004\">\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Although there were detrimental effects of TSD, the usage of AI did not reduce those adverse effects. However, regardless of TSD, AI did result in a short-term increase in HR, improved SRT without affecting the number of errors, and improved JH while concurrently decreasing the RPE. No changes, yet, were observed in SA and DAS. These results suggest that AI could potentially be useful in some military scenarios, regardless of sleep deprivation.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1371\/journal.pone.0293804","type":"journal-article","created":{"date-parts":[[2023,11,15]],"date-time":"2023-11-15T13:34:52Z","timestamp":1700055292000},"page":"e0293804","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":8,"title":["Effects of 36 hours of sleep deprivation on military-related tasks: Can ammonium inhalants maintain performance?"],"prefix":"10.1371","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3037-8755","authenticated-orcid":true,"given":"Jan","family":"Male\u010dek","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8048-6367","authenticated-orcid":true,"given":"Dan","family":"Omcirk","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8159-1548","authenticated-orcid":true,"given":"Kate\u0159ina","family":"Sk\u00e1lov\u00e1","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jan","family":"P\u00e1deck\u00fd","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4912-1001","authenticated-orcid":true,"given":"Martin Tino","family":"Janikov","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael","family":"Obrtel","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1610-4408","authenticated-orcid":true,"given":"Michal","family":"Jon\u00e1\u0161","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David","family":"Kol\u00e1\u0159","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vladim\u00edr","family":"Michali\u010dka","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Karel","family":"S\u00fdkora","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1343-0187","authenticated-orcid":true,"given":"Michal","family":"V\u00e1gner","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lubom\u00edr","family":"P\u0159\u00edv\u011btiv\u00fd","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2529-7069","authenticated-orcid":true,"given":"Tom\u00e1\u0161","family":"V\u011btrovsk\u00fd","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2693-2143","authenticated-orcid":true,"given":"Zde\u0148ka","family":"Bendov\u00e1","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1440-1772","authenticated-orcid":true,"given":"V\u00edt","family":"T\u0159ebick\u00fd","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"James 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