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- W3041112670 abstract "Military operations often require sustained alertness in the presence of physical fatigue, caloric deprivation, and sleep restriction, stressors that may affect men and women differently. PURPOSE: To identify differences in psychomotor vigilance and neurocognitive biomarkers based on sex during simulated military operational stress (SMOS). METHODS: Forty-nine Soldiers (25.8 ± 5.2 years, 174.6 ± 9.5 cm, 80.0 ± 16.2 kg, 21.3 ± 7.0 BF%, 11 women) completed a 5-day/night SMOS protocol. Subjects completed physical and cognitive evaluations from 0900-2230. Nights 3 and 4 included restricted sleep from 0100-0300 and 0500-0700, with psychomotor evaluations between 0300-0500. Subjects were given 50% of caloric demands on Days 3-4. Fasted blood was drawn each morning at 0800, followed by psychomotor vigilance test (PVT). Concentrations of insulin-like growth factor I (IGF-1), α-Klotho, and brain-derived neurotrophic factor (BDNF) were analyzed using standard immunoassays. PVT performance was based on accuracy and response time correlated to a percentile position within a normative distribution. Two-way mixed ANOVA with Bonferroni correction for multiple comparisons were used appropriately (p < 0.05). Day 1 PVT was excluded from the analysis to account for learning effect. RESULTS: There were no sex∗time interaction effects for PVT (p = 0.950), BDNF (p = 0.285), IGF-I (p = 0.103), or α-Klotho (p = 0.091). Main effect of time was observed for PVT (p < 0.001), IGF-I (p < 0.001), and α-Klotho (p < 0.001). PVT performance decreased from D2 to D3 (D2 = 417.45 ± 248.5, D3 = 302.0 ± 252.5; p = 0.01), and from D2 to D4 (D4 = 261.6 ± 256.2; p < 0.001) and rebounded after one night of recovery sleep (D5 = 482.0 ± 257.3). IGF-I and α-Klotho decreased from D1 to D5 by 13.1% (p < 0.001) and 12.0% (p < 0.001), respectively. There was a main effect of sex for BDNF (p = 0.020). On average, BDNF concentrations were 4,368.5 pg/mL higher in women during SMOS. CONCLUSION: SMOS has a similar negative impact in men and women on psychomotor vigilance and neurocognitive biomarkers IGF-I and α-Klotho. However, women demonstrate higher concentrations of BDNF in the presence of SMOS. Department of Defense (Award # W81XWH-16-PHTBIRP-CR3A). The results and opinions herein are those of the authors and do not necessarily constitute endorsement of the Department of Defense." @default.
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- W3041112670 date "2020-07-01" @default.
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- W3041112670 title "Simulated Military Operational Stress Negatively Impacts Psychomotor Vigilance And Neurocognitive Biomarkers In Men And Women" @default.
- W3041112670 doi "https://doi.org/10.1249/01.mss.0000676928.67602.f7" @default.
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