{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T19:21:49Z","timestamp":1790018509902,"version":"4.0.1"},"reference-count":48,"publisher":"Aerospace Medical Association","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,4]]},"abstract":"<jats:p>\n                    <jats:bold>INTRODUCTION:<\/jats:bold>\n                    Despite multiple risk mitigations, the adverse effects of +G\n                    <jats:sub>z<\/jats:sub>\n                    acceleration on cerebral circulation continue to cause military aircraft incidents. A previous survey of Royal Air Force aircrew in 2012 reported that 37.2% had experienced at least one episode of G-induced alteration of consciousness. The aim of the present study was to determine whether the introduction of updated centrifuge training and improved countermeasures in training aircraft has reduced the prevalence of these incidents.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>METHODS:<\/jats:bold>\n                    An anonymous online survey of all UK Armed Forces pilots was carried out in 2023 to reassess the prevalence of G-induced alterations of consciousness and to investigate perceptions of G-related risk factors and mitigations in pilots exposed to the high-G environment.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>RESULTS:<\/jats:bold>\n                    Responses were received from 403 pilots, with a response rate of 11.9%. At least one incident of G-induced alteration of consciousness was reported by 21.6% of pilots. Frontline jet pilots reported a higher proportion of incidents compared to previous surveys, with more recent incidents involving the Eurofighter Typhoon than any other aircraft type (29.0% from 2015\u20132023,\n                    <jats:italic>N<\/jats:italic>\n                    = 38). Recency of +G\n                    <jats:sub>z<\/jats:sub>\n                    exposure was rated as the most important factor affecting the risk of G-induced incidents.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>DISCUSSION:<\/jats:bold>\n                    An overall reduction in prevalence of G-induced alteration of consciousness incidents was observed, with frontline jet pilots reporting a higher proportion of incidents over time. The reported importance of high-G recency as a risk factor suggests that additional risk assessment for the G-layoff effect may be beneficial for UK frontline jet pilots.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>\n                      Jones M-L, Britton JK, Green NDC, Pollock RD.\n                      <jats:italic>G-induced alterations of consciousness in UK military aviation<\/jats:italic>\n                      . Aerosp Med Hum Perform. 2026; 97(4):257\u2013263.\n                    <\/jats:bold>\n                  <\/jats:p>","DOI":"10.3357\/amhp.6452.2026","type":"journal-article","created":{"date-parts":[[2026,3,28]],"date-time":"2026-03-28T00:30:29Z","timestamp":1774657829000},"page":"257-263","source":"Crossref","is-referenced-by-count":1,"title":["G-Induced Alterations of Consciousness in UK Military Aviation"],"prefix":"10.3357","volume":"97","author":[{"given":"Michael-Luke","family":"Jones","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joseph K.","family":"Britton","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicholas D. C.","family":"Green","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ross D.","family":"Pollock","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1911","reference":[{"issue":"12","key":"B1","series-title":"Exp Physiol.","first-page":"2367","article-title":"Oh G: the x, y and z of human physiological responses to acceleration","volume":"106","author":"Pollock RD","year":"2021","unstructured":"Pollock RD, Hodkinson PD, Smith TG. Oh G: the x, y and z of human physiological responses to acceleration. Exp Physiol. 2021 Dec; 106(12):2367\u201384."},{"key":"B2","article-title":"G effects on the pilot during aerobatics","author":"Mohler SR.","year":"1972","unstructured":"Mohler SR. G effects on the pilot during aerobatics. Washington (DC): Federal Aviation Administration; 1972 Jul. Report No.: FAA-AM-72-28; [Accessed 2025 Dec. 22]. Available from https:\/\/www.faa.gov\/sites\/faa.gov\/files\/data_research\/research\/med_humanfacs\/oamtechreports\/AM72-28.pdf."},{"issue":"4","key":"B3","series-title":"Aviat Space Environ Med.","first-page":"310","article-title":"Analysis of the Gz environment during air combat maneuvering in the F\/A-18 fighter aircraft","volume":"70","author":"Newman DG","year":"1999","unstructured":"Newman DG, Callister R. Analysis of the Gz environment during air combat maneuvering in the F\/A-18 fighter aircraft. Aviat Space Environ Med. 1999 Apr; 70(4):310\u20135."},{"issue":"1","key":"B4","series-title":"Aviat Space Environ Med.","first-page":"83","article-title":"Incapacitation time for +Gz-induced loss of consciousness","volume":"50","author":"Whinnery JE","year":"1979","unstructured":"Whinnery JE, Shaffstall RM. Incapacitation time for +Gz-induced loss of consciousness. Aviat Space Environ Med. 1979 Jan; 50(1):83\u20135."},{"issue":"10","key":"B5","series-title":"Aviat Space Environ Med.","first-page":"1021","article-title":"Acceleration-induced near-loss of consciousness: the \u201cA-LOC\u201d syndrome","volume":"74","author":"Shender BS","year":"2003","unstructured":"Shender BS, Forster EM, Hrebien L, Ryoo HC, Cammarota JP Jr. Acceleration-induced near-loss of consciousness: the \u201cA-LOC\u201d syndrome. Aviat Space Environ Med. 2003 Oct; 74(10):1021\u20138."},{"issue":"6","key":"B6","series-title":"Aviat Space Environ Med.","first-page":"479","article-title":"Analysis of mission and aircraft factors in G-induced loss of consciousness in the USAF: 1982-2002","volume":"75","author":"Lyons TJ","year":"2004","unstructured":"Lyons TJ, Kraft NO, Copley GB, Davenport C, Grayson K, Binder H. Analysis of mission and aircraft factors in G-induced loss of consciousness in the USAF: 1982-2002. Aviat Space Environ Med. 2004 Jun; 75(6):479\u201382."},{"issue":"3","key":"B7","series-title":"Aviat Space Environ Med.","first-page":"253","article-title":"Extended-coverage-bladder G-suits can provide improved G-tolerance and high Gz foot pain","volume":"67","author":"Paul MA.","year":"1996","unstructured":"Paul MA. Extended-coverage-bladder G-suits can provide improved G-tolerance and high Gz foot pain. Aviat Space Environ Med. 1996 Mar; 67(3):253\u20135."},{"issue":"9","key":"B8","series-title":"Aviat Space Environ Med.","first-page":"845","article-title":"Positive pressure breathing for acceleration protection and its role in prevention of inflight G-induced loss of consciousness","volume":"61","author":"Harding RM","year":"1990","unstructured":"Harding RM, Bomar JB Jr. Positive pressure breathing for acceleration protection and its role in prevention of inflight G-induced loss of consciousness. Aviat Space Environ Med. 1990 Sep; 61(9):845\u20139."},{"issue":"11","key":"B9","series-title":"Aerosp Med Hum Perform.","first-page":"925","article-title":"Hemodynamic responses and G protection afforded by three different anti-G systems","volume":"90","author":"Pollock RD","year":"2019","unstructured":"Pollock RD, Firth RV, Storey JA, Phillips KE, Connolly DM,  Hemodynamic responses and G protection afforded by three different anti-G systems. Aerosp Med Hum Perform. 2019 Nov 1; 90(11):925\u201333."},{"issue":"5","key":"B10","series-title":"IEEE Aerosp Electron Syst Mag.","first-page":"4","article-title":"Automatic ground collision avoidance system design, integration, & flight test","volume":"26","author":"Swihart DE","year":"2011","unstructured":"Swihart DE, Barfield AF, Griffin EM, Lehmann RC, Whitcomb SC,  Automatic ground collision avoidance system design, integration, & flight test. IEEE Aerosp Electron Syst Mag. 2011 Jun 9; 26(5):4\u201311."},{"issue":"1","key":"B11","series-title":"Aerosp Med Hum Perform.","first-page":"51","article-title":"G-LOC due to the push-pull effect in a fatal F-16 Mishap","volume":"91","author":"Metzler MM.","year":"2020","unstructured":"Metzler MM. G-LOC due to the push-pull effect in a fatal F-16 Mishap. Aerosp Med Hum Perform. 2020 Jan 1; 91(1):51\u20135."},{"issue":"6","key":"B12","series-title":"Aviat Space Environ Med.","first-page":"600","article-title":"+Gz-induced loss of consciousness and aircraft recovery","volume":"58","author":"Whinnery JE","year":"1987","unstructured":"Whinnery JE, Glaister DH, Burton RR. +Gz-induced loss of consciousness and aircraft recovery. Aviat Space Environ Med. 1987 Jun; 58(6):600\u20133."},{"issue":"5","key":"B13","series-title":"Aviat Space Environ Med.","first-page":"496","article-title":"Further support for the concept of a G-LOC syndrome: a survey of military high-performance aviators","volume":"71","author":"Morrissette KL","year":"2000","unstructured":"Morrissette KL, McGowan DG. Further support for the concept of a G-LOC syndrome: a survey of military high-performance aviators. Aviat Space Environ Med. 2000 May; 71(5):496\u2013500."},{"key":"B14","article-title":"Questionnaire survey to investigate the incidence of G induced loss of consciousness in the Royal Air Force","author":"Prior A.","year":"1987","unstructured":"Prior A. Questionnaire survey to investigate the incidence of G induced loss of consciousness in the Royal Air Force. London (UK): Ministry of Defence, RAF Institute of Aviation Medicine; 1987. Report No.: 650."},{"issue":"6","key":"B15","series-title":"Aerosp Med Hum Perform.","first-page":"550","article-title":"Incidence of G-induced loss of consciousness and almost loss of consciousness in the Royal Air Force","volume":"88","author":"Slungaard E","year":"2017","unstructured":"Slungaard E, McLeod J, Green NDC, Kiran A, Newham DJ, Harridge SDR. Incidence of G-induced loss of consciousness and almost loss of consciousness in the Royal Air Force. Aerosp Med Hum Perform. 2017 Jun 1; 88(6):550\u20135."},{"issue":"2","key":"B16","series-title":"Mil Med.","first-page":"163","article-title":"Visual symptoms and G-induced loss of consciousness in 594 Chinese Air Force aircrew\u2014a questionnaire survey","volume":"177","author":"Cao X-S","year":"2012","unstructured":"Cao X-S, Wang Y-C, Xu L, Yang C-B, Wang B,  Visual symptoms and G-induced loss of consciousness in 594 Chinese Air Force aircrew\u2014a questionnaire survey. Mil Med. 2012 Feb; 177(2):163\u20138."},{"issue":"6","key":"B17","series-title":"Aviat Space Environ Med.","first-page":"619","article-title":"G-induced loss of consciousness: retrospective survey results from 2259 military aircrew","volume":"77","author":"Green ND","year":"2006","unstructured":"Green ND, Ford SA. G-induced loss of consciousness: retrospective survey results from 2259 military aircrew. Aviat Space Environ Med. 2006 Jun; 77(6):619\u201323."},{"issue":"8","key":"B18","series-title":"Aviat Space Environ Med.","first-page":"699","article-title":"The \u201cpush-pull effect","volume":"65","author":"Banks RD","year":"1994","unstructured":"Banks RD, Grissett JD, Turnipseed GT, Saunders PL, Rupert AH. The \u201cpush-pull effect.\u201d Aviat Space Environ Med. 1994 Aug; 65(8):699\u2013704."},{"issue":"1","key":"B19","series-title":"Aviat Space Environ Med.","first-page":"6","article-title":"A new look at the loss of consciousness experience within the U.S. Naval forces","volume":"59","author":"Johanson DC","year":"1988","unstructured":"Johanson DC, Pheeny HT. A new look at the loss of consciousness experience within the U.S. Naval forces. Aviat Space Environ Med. 1988 Jan; 59(1):6\u20138."},{"issue":"5","key":"B20","series-title":"Aviat Space Environ Med.","first-page":"496","article-title":"G-induced visual and cognitive disturbances in a survey of 65 operational fighter pilots","volume":"76","author":"Rickards CA","year":"2005","unstructured":"Rickards CA, Newman DG. G-induced visual and cognitive disturbances in a survey of 65 operational fighter pilots. Aviat Space Environ Med. 2005 May; 76(5):496\u2013500."},{"issue":"2","key":"B21","series-title":"J Biomed Inform.","first-page":"377","article-title":"Research electronic data capture (REDCap)\u2013a metadata-driven methodology and workflow process for providing translational research informatics support","volume":"42","author":"Harris PA","year":"2009","unstructured":"Harris PA, Taylor R, Thielke R, Payne J, Gonzalez N, Conde JG. Research electronic data capture (REDCap)\u2013a metadata-driven methodology and workflow process for providing translational research informatics support. J Biomed Inform. 2009 Apr; 42(2):377\u201381."},{"issue":"6","key":"B22","series-title":"Am J Physiol Regul Integr Comp Physiol.","first-page":"R597","article-title":"Human cardiovascular adaptation to hypergravity","volume":"322","author":"Eiken O","year":"2022","unstructured":"Eiken O, Keramidas ME, Sk\u00f6ldefors H, K\u00f6leg\u00e5rd R. Human cardiovascular adaptation to hypergravity. Am J Physiol Regul Integr Comp Physiol. 2022 Jun 1; 322(6):R597\u2013608."},{"issue":"5","key":"B23","series-title":"Aviat Space Environ Med.","first-page":"448","article-title":"Effects of G-layoff on subsequent tolerance to +Gz [Abstract]","volume":"65","author":"Morgan TR","year":"1994","unstructured":"Morgan TR, Hill RC, Burns JW, Vanderbeek RD. Effects of G-layoff on subsequent tolerance to +Gz [Abstract]. Aviat Space Environ Med. 1994 May; 65(5):448."},{"issue":"2","key":"B24","series-title":"Aviat Space Environ Med.","first-page":"128","article-title":"Unpredictability of fighter pilot G tolerance using anthropometric and physiologic variables","volume":"62","author":"Webb JT","year":"1991","unstructured":"Webb JT, Oakley CJ, Meeker LJ. Unpredictability of fighter pilot G tolerance using anthropometric and physiologic variables. Aviat Space Environ Med. 1991 Feb; 62(2):128\u201335. Erratum in: Aviat Space Environ Med 1991 Aug; 62(8):804."},{"issue":"12","key":"B1","series-title":"Exp Physiol.","first-page":"2367","article-title":"Oh G: the x, y and z of human physiological responses to acceleration","volume":"106","author":"Pollock RD","year":"2021","unstructured":"Pollock RD, Hodkinson PD, Smith TG. Oh G: the x, y and z of human physiological responses to acceleration. Exp Physiol. 2021 Dec; 106(12):2367\u201384."},{"key":"B2","article-title":"G effects on the pilot during aerobatics","author":"Mohler SR.","year":"1972","unstructured":"Mohler SR. G effects on the pilot during aerobatics. Washington (DC): Federal Aviation Administration; 1972 Jul. Report No.: FAA-AM-72-28; [Accessed 2025 Dec. 22]. Available from https:\/\/www.faa.gov\/sites\/faa.gov\/files\/data_research\/research\/med_humanfacs\/oamtechreports\/AM72-28.pdf."},{"issue":"4","key":"B3","series-title":"Aviat Space Environ Med.","first-page":"310","article-title":"Analysis of the Gz environment during air combat maneuvering in the F\/A-18 fighter aircraft","volume":"70","author":"Newman DG","year":"1999","unstructured":"Newman DG, Callister R. Analysis of the Gz environment during air combat maneuvering in the F\/A-18 fighter aircraft. Aviat Space Environ Med. 1999 Apr; 70(4):310\u20135."},{"issue":"1","key":"B4","series-title":"Aviat Space Environ Med.","first-page":"83","article-title":"Incapacitation time for +Gz-induced loss of consciousness","volume":"50","author":"Whinnery JE","year":"1979","unstructured":"Whinnery JE, Shaffstall RM. Incapacitation time for +Gz-induced loss of consciousness. Aviat Space Environ Med. 1979 Jan; 50(1):83\u20135."},{"issue":"10","key":"B5","series-title":"Aviat Space Environ Med.","first-page":"1021","article-title":"Acceleration-induced near-loss of consciousness: the \u201cA-LOC\u201d syndrome","volume":"74","author":"Shender BS","year":"2003","unstructured":"Shender BS, Forster EM, Hrebien L, Ryoo HC, Cammarota JP Jr. Acceleration-induced near-loss of consciousness: the \u201cA-LOC\u201d syndrome. Aviat Space Environ Med. 2003 Oct; 74(10):1021\u20138."},{"issue":"6","key":"B6","series-title":"Aviat Space Environ Med.","first-page":"479","article-title":"Analysis of mission and aircraft factors in G-induced loss of consciousness in the USAF: 1982-2002","volume":"75","author":"Lyons TJ","year":"2004","unstructured":"Lyons TJ, Kraft NO, Copley GB, Davenport C, Grayson K, Binder H. Analysis of mission and aircraft factors in G-induced loss of consciousness in the USAF: 1982-2002. Aviat Space Environ Med. 2004 Jun; 75(6):479\u201382."},{"issue":"3","key":"B7","series-title":"Aviat Space Environ Med.","first-page":"253","article-title":"Extended-coverage-bladder G-suits can provide improved G-tolerance and high Gz foot pain","volume":"67","author":"Paul MA.","year":"1996","unstructured":"Paul MA. Extended-coverage-bladder G-suits can provide improved G-tolerance and high Gz foot pain. Aviat Space Environ Med. 1996 Mar; 67(3):253\u20135."},{"issue":"9","key":"B8","series-title":"Aviat Space Environ Med.","first-page":"845","article-title":"Positive pressure breathing for acceleration protection and its role in prevention of inflight G-induced loss of consciousness","volume":"61","author":"Harding RM","year":"1990","unstructured":"Harding RM, Bomar JB Jr. Positive pressure breathing for acceleration protection and its role in prevention of inflight G-induced loss of consciousness. Aviat Space Environ Med. 1990 Sep; 61(9):845\u20139."},{"issue":"11","key":"B9","series-title":"Aerosp Med Hum Perform.","first-page":"925","article-title":"Hemodynamic responses and G protection afforded by three different anti-G systems","volume":"90","author":"Pollock RD","year":"2019","unstructured":"Pollock RD, Firth RV, Storey JA, Phillips KE, Connolly DM,  Hemodynamic responses and G protection afforded by three different anti-G systems. Aerosp Med Hum Perform. 2019 Nov 1; 90(11):925\u201333."},{"issue":"5","key":"B10","series-title":"IEEE Aerosp Electron Syst Mag.","first-page":"4","article-title":"Automatic ground collision avoidance system design, integration, & flight test","volume":"26","author":"Swihart DE","year":"2011","unstructured":"Swihart DE, Barfield AF, Griffin EM, Lehmann RC, Whitcomb SC,  Automatic ground collision avoidance system design, integration, & flight test. IEEE Aerosp Electron Syst Mag. 2011 Jun 9; 26(5):4\u201311."},{"issue":"1","key":"B11","series-title":"Aerosp Med Hum Perform.","first-page":"51","article-title":"G-LOC due to the push-pull effect in a fatal F-16 Mishap","volume":"91","author":"Metzler MM.","year":"2020","unstructured":"Metzler MM. G-LOC due to the push-pull effect in a fatal F-16 Mishap. Aerosp Med Hum Perform. 2020 Jan 1; 91(1):51\u20135."},{"issue":"6","key":"B12","series-title":"Aviat Space Environ Med.","first-page":"600","article-title":"+Gz-induced loss of consciousness and aircraft recovery","volume":"58","author":"Whinnery JE","year":"1987","unstructured":"Whinnery JE, Glaister DH, Burton RR. +Gz-induced loss of consciousness and aircraft recovery. Aviat Space Environ Med. 1987 Jun; 58(6):600\u20133."},{"issue":"5","key":"B13","series-title":"Aviat Space Environ Med.","first-page":"496","article-title":"Further support for the concept of a G-LOC syndrome: a survey of military high-performance aviators","volume":"71","author":"Morrissette KL","year":"2000","unstructured":"Morrissette KL, McGowan DG. Further support for the concept of a G-LOC syndrome: a survey of military high-performance aviators. Aviat Space Environ Med. 2000 May; 71(5):496\u2013500."},{"key":"B14","article-title":"Questionnaire survey to investigate the incidence of G induced loss of consciousness in the Royal Air Force","author":"Prior A.","year":"1987","unstructured":"Prior A. Questionnaire survey to investigate the incidence of G induced loss of consciousness in the Royal Air Force. London (UK): Ministry of Defence, RAF Institute of Aviation Medicine; 1987. Report No.: 650."},{"issue":"6","key":"B15","series-title":"Aerosp Med Hum Perform.","first-page":"550","article-title":"Incidence of G-induced loss of consciousness and almost loss of consciousness in the Royal Air Force","volume":"88","author":"Slungaard E","year":"2017","unstructured":"Slungaard E, McLeod J, Green NDC, Kiran A, Newham DJ, Harridge SDR. Incidence of G-induced loss of consciousness and almost loss of consciousness in the Royal Air Force. Aerosp Med Hum Perform. 2017 Jun 1; 88(6):550\u20135."},{"issue":"2","key":"B16","series-title":"Mil Med.","first-page":"163","article-title":"Visual symptoms and G-induced loss of consciousness in 594 Chinese Air Force aircrew\u2014a questionnaire survey","volume":"177","author":"Cao X-S","year":"2012","unstructured":"Cao X-S, Wang Y-C, Xu L, Yang C-B, Wang B,  Visual symptoms and G-induced loss of consciousness in 594 Chinese Air Force aircrew\u2014a questionnaire survey. Mil Med. 2012 Feb; 177(2):163\u20138."},{"issue":"6","key":"B17","series-title":"Aviat Space Environ Med.","first-page":"619","article-title":"G-induced loss of consciousness: retrospective survey results from 2259 military aircrew","volume":"77","author":"Green ND","year":"2006","unstructured":"Green ND, Ford SA. G-induced loss of consciousness: retrospective survey results from 2259 military aircrew. Aviat Space Environ Med. 2006 Jun; 77(6):619\u201323."},{"issue":"8","key":"B18","series-title":"Aviat Space Environ Med.","first-page":"699","article-title":"The \u201cpush-pull effect","volume":"65","author":"Banks RD","year":"1994","unstructured":"Banks RD, Grissett JD, Turnipseed GT, Saunders PL, Rupert AH. The \u201cpush-pull effect.\u201d Aviat Space Environ Med. 1994 Aug; 65(8):699\u2013704."},{"issue":"1","key":"B19","series-title":"Aviat Space Environ Med.","first-page":"6","article-title":"A new look at the loss of consciousness experience within the U.S. Naval forces","volume":"59","author":"Johanson DC","year":"1988","unstructured":"Johanson DC, Pheeny HT. A new look at the loss of consciousness experience within the U.S. Naval forces. Aviat Space Environ Med. 1988 Jan; 59(1):6\u20138."},{"issue":"5","key":"B20","series-title":"Aviat Space Environ Med.","first-page":"496","article-title":"G-induced visual and cognitive disturbances in a survey of 65 operational fighter pilots","volume":"76","author":"Rickards CA","year":"2005","unstructured":"Rickards CA, Newman DG. G-induced visual and cognitive disturbances in a survey of 65 operational fighter pilots. Aviat Space Environ Med. 2005 May; 76(5):496\u2013500."},{"issue":"2","key":"B21","series-title":"J Biomed Inform.","first-page":"377","article-title":"Research electronic data capture (REDCap)\u2013a metadata-driven methodology and workflow process for providing translational research informatics support","volume":"42","author":"Harris PA","year":"2009","unstructured":"Harris PA, Taylor R, Thielke R, Payne J, Gonzalez N, Conde JG. Research electronic data capture (REDCap)\u2013a metadata-driven methodology and workflow process for providing translational research informatics support. J Biomed Inform. 2009 Apr; 42(2):377\u201381."},{"issue":"6","key":"B22","series-title":"Am J Physiol Regul Integr Comp Physiol.","first-page":"R597","article-title":"Human cardiovascular adaptation to hypergravity","volume":"322","author":"Eiken O","year":"2022","unstructured":"Eiken O, Keramidas ME, Sk\u00f6ldefors H, K\u00f6leg\u00e5rd R. Human cardiovascular adaptation to hypergravity. Am J Physiol Regul Integr Comp Physiol. 2022 Jun 1; 322(6):R597\u2013608."},{"issue":"5","key":"B23","series-title":"Aviat Space Environ Med.","first-page":"448","article-title":"Effects of G-layoff on subsequent tolerance to +Gz [Abstract]","volume":"65","author":"Morgan TR","year":"1994","unstructured":"Morgan TR, Hill RC, Burns JW, Vanderbeek RD. Effects of G-layoff on subsequent tolerance to +Gz [Abstract]. Aviat Space Environ Med. 1994 May; 65(5):448."},{"issue":"2","key":"B24","series-title":"Aviat Space Environ Med.","first-page":"128","article-title":"Unpredictability of fighter pilot G tolerance using anthropometric and physiologic variables","volume":"62","author":"Webb JT","year":"1991","unstructured":"Webb JT, Oakley CJ, Meeker LJ. Unpredictability of fighter pilot G tolerance using anthropometric and physiologic variables. Aviat Space Environ Med. 1991 Feb; 62(2):128\u201335. 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