Aerospace medicine and human performance最新文献

{"title":"Sleep Patterns of U.S. Navy Personnel Transitioning from Training to Fleet Assignments.","authors":"Nita Lewis Shattuck, Panagiotis Matsangas","doi":"10.3357/AMHP.6732.2026","DOIUrl":"10.3357/AMHP.6732.2026","url":null,"abstract":"<p><strong>Introduction: </strong>It is often assumed that the sleep received by military personnel when they are in training is better than that they receive in their fleet assignments. The current study assessed this assumption.</p><p><strong>Methods: </strong>Using wearable devices, this prospective naturalistic study monitored the sleep patterns of 99 fit-for-duty (median age = 38 yr; 91 males) U.S. Navy surface warfare officers for a median of 340 d per subject. Data were collected while the subjects attended standardized training in a shore-based facility and during their follow-on fleet assignments.</p><p><strong>Results: </strong>Subjects slept on average 6.79 ± 0.578 h/d (64.7% slept on average <7 h/d and 6.06% slept <6 h/d). Sleep deprivation was evident in both environments but was more pronounced in the fleet assignment. Subjects slept more on weekends (+0.54 h/d in training and +0.84 h/d in fleet assignment); however, this extra sleep was not enough to account for the sleep loss during weekdays. In addition, sleep patterns were more irregular in the fleet. For subjects' major sleep episodes, heart rate, lowest heart rate, respiratory rate, and respiratory rate variability were higher in training. Sleep efficiency and heart rate variability did not differ between the two settings.</p><p><strong>Discussion: </strong>Our results shed light on the differences in sleep patterns and cardiac/respiratory activity indices between a training environment and fleet assignments. Daily sleep duration and sleep regularity are better in a training environment. The changes we identified in cardiac activity, respiration, and sleep efficiency need to be further assessed by focusing more closely on sleep stages. Shattuck NL, Matsangas P. Sleep patterns of U.S. Navy personnel transitioning from training to fleet assignments. Aerosp Med Hum Perform. 2026; 97(5):327-332.</p>","PeriodicalId":7463,"journal":{"name":"Aerospace medicine and human performance","volume":"97 5","pages":"327-332"},"PeriodicalIF":0.8,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147759616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Demographic Makeup of Aerospace Medicine Specialists.","authors":"Andrew Z Lam","doi":"10.3357/AMHP.6084.2026","DOIUrl":"10.3357/AMHP.6084.2026","url":null,"abstract":"<p><strong>Introduction: </strong>The flying population is diversifying, but the demographic composition of aerospace medicine specialists remains understudied. Nevertheless, comparing figures on the racial, ethnic, and gender makeup of pilots and astronauts with analog data from preventive medicine physicians and recent aerospace medicine residents reveals that certain minority groups served by aerospace medicine are likely underrepresented among aerospace medicine practitioners. Arguments regarding the potential advantages and challenges of diversity in aerospace medicine are presented, accompanied by supporting examples and research. Regardless of how its constituency ultimately decides to address the issue of diversity, an accurate collection of demographic data would provide the aerospace medicine profession with the information required for an evidence-based approach. Lam AZ. The demographic makeup of aerospace medicine specialists. Aerosp Med Hum Perform. 2026; 97(5):389-391.</p>","PeriodicalId":7463,"journal":{"name":"Aerospace medicine and human performance","volume":"97 5","pages":"389-391"},"PeriodicalIF":0.8,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147759699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pilot Performance Enhancement Through Flickering Bars at Varying Frequencies in Attitude Indicators.","authors":"Hao Jiang, Mingyuan Wen, Xing Peng, Xinze Yu, Ruize Liu","doi":"10.3357/AMHP.6792.2026","DOIUrl":"10.3357/AMHP.6792.2026","url":null,"abstract":"<p><strong>Introduction: </strong>The aircraft attitude indicator is crucial for flight safety, yet its conventional design may lead to slower responses and reversal errors. This study examined whether flickering bars at different frequencies around the indicator could improve pilot performance.</p><p><strong>Methods: </strong>Forty-five pilots completed a recovery task and a tracking task with a joystick. In both tasks, the attitude indicator was modified by adding bars flickering at five frequencies (0, 2, 4, 6, and 8 Hz). A total of 14 dependent variables were recorded, including response times, reversal error rates, accuracy, and root mean square errors.</p><p><strong>Results: </strong>Across the 14 dependent variables, 3 showed significant main effects of flicker frequency. Of the nonzero flicker conditions, performance under the 6-Hz bars was generally higher than that of the other frequencies. In the recovery task, the roll reversal error rate at 6 Hz (3.39%) was significantly lower than at 4 Hz (4.64%) and 8 Hz (4.86%). Recovery accuracy was highest at 6 Hz (96.68%), significantly outperforming 2 Hz (95.57%). In the tracking task, initiation times were fastest at 6 Hz (875 ms), significantly shorter than at 2 Hz (1028 ms). Conversely, 2-Hz flickering bars produced the worst outcomes, with the lowest accuracy and longest initiation times. The performance of the 0-Hz (nonflickering) condition was comparable to that of the 6-Hz bars on several measures.</p><p><strong>Discussion: </strong>These findings extend prior research on visual salience and redundancy in cockpit display design, offering empirical evidence that flickering frequency influences pilot performance. The results provide practical implications for cockpit instrumentation design. Jiang H, Wen M, Peng X, Yu X, Liu R. Pilot performance enhancement through flickering bars at varying frequencies in attitude indicators. Aerosp Med Hum Perform. 2026; 97(4):249-256.</p>","PeriodicalId":7463,"journal":{"name":"Aerospace medicine and human performance","volume":"97 4","pages":"249-256"},"PeriodicalIF":0.8,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147525353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spaceflight-Associated Epiphora Mechanisms and Countermeasures.","authors":"Blake Douglas Katsev, Ryung Lee, Joshua Ong, C Robert Gibson, Thomas H Mader, Ethan Waisberg, William Lipsky, Ritu Sampige, John Berdahl","doi":"10.3357/AMHP.6808.2026","DOIUrl":"10.3357/AMHP.6808.2026","url":null,"abstract":"<p><strong>Introduction: </strong>Epiphora, or excessive tearing, is a commonly reported symptom among those with dry eyes in the terrestrial environment. It is therefore not surprising that a higher frequency of epiphora was demonstrated among astronauts onboard both Space Transportation Shuttle and International Space Station missions. In this review paper, we discuss the pathophysiology and mechanisms of epiphora and consider the additional risk factors due to the extreme environments of spaceflight, including microgravity and, to a lesser extent, radiation. We also discuss potential strategies to mitigate spaceflight-associated epiphora.</p><p><strong>Methods: </strong>This review utilized articles related to epiphora and the spaceflight environment from various medical literature databases including Embase, Google Scholar, Web of Science, Grey Literature, PubMed, and reliable secondary sources, such as NASA webpages.</p><p><strong>Results: </strong>Our search strategy resulted in 94 articles, and 67 articles were relevant to our study.</p><p><strong>Discussion: </strong>Spaceflight-associated epiphora has a multifactorial etiology related to both reflex tearing and obstruction of the lacrimal drainage system. Dry eyes are closely associated with epiphora in space as the result of ocular irritation causing reflex tearing. Decreased tear drainage may result from the lack of gravitational assistance and the cephalad fluid shift which may create a functional obstruction of the lacrimal drainage system. While primarily a concern with chronic exposure, radiation may irritate the cornea, cause lacrimal and Meibomian gland atrophy, and disrupt tear film stability. Potential countermeasures include maintaining the tear film, mitigating the cephalad fluid shift, and protecting from radiation. Katsev BD, Lee R, Ong J, Gibson CR, Mader TH, Waisberg E, Lipsky W, Sampige R, Berdahl J. Spaceflight-associated epiphora mechanisms and countermeasures. Aerosp Med Hum Perform. 2026; 97(4):272-278.</p>","PeriodicalId":7463,"journal":{"name":"Aerospace medicine and human performance","volume":"97 4","pages":"272-278"},"PeriodicalIF":0.8,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147525182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lemierre's Syndrome in a Commercial Airline Pilot.","authors":"Alejandro Fandino, Christian Woodbridge, Gary Back, Tim Sprott","doi":"10.3357/AMHP.6780.2026","DOIUrl":"10.3357/AMHP.6780.2026","url":null,"abstract":"<p><strong>Background: </strong>Lemierre's syndrome (LS) is a rare, life-threatening complication of an acute oropharyngeal infection. It is commonly associated with pharyngitis caused by Fusobacterium necrophorum, which can lead to septic thrombophlebitis of the internal jugular vein. Subsequently, septic emboli usually form, which can metastasize to the liver, lungs, endocardium, and joints. The role of anticoagulation in LS remains debated and there is no universal consensus on best practice.</p><p><strong>Case report: </strong>A 39-yr-old commercial pilot, flying air cargo operations in Australia, presented to the emergency department with a sore throat, was given antibiotics, and then discharged. He re-presented 2 d later with fever and increased painful swelling of the right lateral neck. A CT scan showed gas-forming thrombophlebitis in the superior sagittal sinus, right transverse sinus, and right internal jugular vein. He was started on broad-spectrum antibiotics and on anticoagulation with enoxaparin. Initial control of the infection was challenging despite antibiotics, requiring a staged surgical exploration and washout of the neck. After reintervention, the patient made an excellent recovery. However, given his anticoagulation, he had to wait several months for clearances from various specialties before the Australian and New Zealand aviation authorities allowed him to fly commercially again.</p><p><strong>Discussion: </strong>There is currently no consensus in the medical literature on the timing, duration, dosing, or type of anticoagulant for LS, making it challenging to publish unified recommendations for Aviation Medical Examiners. This case report highlights the importance of an individualized approach to prevent unjustified grounding of pilots on anticoagulation. Fandino A, Woodbridge C, Back G, Sprott T. Lemierre's syndrome in a commercial airline pilot. Aerosp Med Hum Perform. 2026; 97(4):296-299.</p>","PeriodicalId":7463,"journal":{"name":"Aerospace medicine and human performance","volume":"97 4","pages":"296-299"},"PeriodicalIF":0.8,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147525355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prevalence of Neurological and Mental Health Illness in U.S. Naval Aviators: A Retrospective Cohort Study.","authors":"G Merrill Rice, Steven Linnville, Tina M Luse, Jonathan D Erpenbach, Stephanie A Larocco","doi":"10.3357/AMHP.6806.2026","DOIUrl":"10.3357/AMHP.6806.2026","url":null,"abstract":"<p><strong>Introduction: </strong>Recent media and public attention have linked the naval tactical aircraft accelerative environment to potential neurological and mental health issues, but epidemiological research on tactical aviators is limited. This study reports the current prevalence of selected neurological and mental health disorders among naval tactical aviators and nontactical aviators.</p><p><strong>Methods: </strong>A retrospective cohort-designed study was performed on 10,661 active-duty naval aviators identified within the Naval Fleet Training Management and Planning System. Their unique identification codes were associated with all available military electronic health records within the Military Health System Data Repository for certain neurological and mental health International Classification of Diseases codes from October 2000 through December 2024.</p><p><strong>Results: </strong>In total 8593 active-duty naval aviators met inclusion criteria. Compared to tactical aviators, helicopter aviators had higher odds of behavioral health disorders overall [odds ratio (OR) 1.29, 95% confidence limits (CL) 1.10-1.52], adjustment disorders (OR 1.35, 95% CL 1.09-1.68), and posttraumatic stress disorder (OR 1.82, 95% CL 1.02-3.25). Reconnaissance aviators had higher odds of behavioral health disorders overall (OR 1.37, 95% CL 1.17-1.60), adjustment disorders (OR 1.5, 95% CL 1.22-1.85), posttraumatic stress disorder (OR 1.84, 95% CL 1.05-3.22), and anxiety (OR 1.33, 95% CL 1.05-1.70) compared to tactical aviators. No significant differences were observed between these cohorts for selected neurological conditions.</p><p><strong>Discussion: </strong>Accelerative exposures in tactical naval aviation differ and are generally far lower than those seen in sports involving repetitive head impacts. Advances in medical imaging and neuro-biomarkers allow aeromedical researchers to examine this population for potential subclinical neurological changes. Rice GM, Linnville S, Luse TM, Erpenbach JD, Larocco SA. Prevalence of neurological and mental health illness in U.S. naval aviators: a retrospective cohort study. Aerosp Med Hum Perform. 2026; 97(4):264-271.</p>","PeriodicalId":7463,"journal":{"name":"Aerospace medicine and human performance","volume":"97 4","pages":"264-271"},"PeriodicalIF":0.8,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147525307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanisms of Rat Gastrocnemius Muscular Atrophy Induced by Hindlimb Unloading.","authors":"Lingying Liu, Yaoyuan Cui, Ruipeng Wu, Jing Yang, Yujuan Li","doi":"10.3357/AMHP.6791.2026","DOIUrl":"10.3357/AMHP.6791.2026","url":null,"abstract":"<p><strong>Introduction: </strong>Muscle atrophy is a critical health challenge during spaceflight. This study investigated the mechanism of muscle atrophy induced by 21-d hindlimb unloading (HLU) and metabolomic changes in rat gastrocnemius muscle (GM) and plasma.</p><p><strong>Methods: </strong>The rat tail-suspended model was used to simulate microgravity. The effects of HLU on GM atrophy were assessed by measuring morphological changes, levels of oxidative stress factors and proinflammatory cytokines, and the expression of key proteins in the insulin-like growth factor 1 receptor/phosphatidylinositol 3-kinase/Ak strain transforming and nuclear factor-κB (NF-κB) signaling pathways. Metabolomic analysis of GM tissue and plasma was conducted to screen for differential metabolites associated with muscle atrophy under HLU conditions.</p><p><strong>Results: </strong>HLU reduced the cross-sectional area of GM fibers and increased inflammatory factors interleukin-1β and tumor necrosis factor-α levels by 11.85% and 42.18%, respectively. Levels of oxidative stress markers hydrogen peroxide and malondialdehyde in GM were increased by 17.95% and 112.19%, respectively. The HLU activated the NF-κB signaling pathway in GM and inhibited the insulin-like growth factor 1 receptor/phosphatidylinositol 3-kinase/Ak strain transforming pathway. Metabolomic analysis revealed nicotinamide and arachidonic acid levels were dramatically decreased and the kynurenic acid and glutaric acid levels were increased, which reduced peroxisome proliferator-activated receptor γ coactivator 1α and peroxisome proliferator-activated receptor γ protein expression, activating the NF-κB signaling pathway to promote proteolysis.</p><p><strong>Discussion: </strong>The present study elucidated the potential mechanism of HLU-induced muscle atrophy at the metabolic level. These findings may supply potential biomarkers for astronaut health monitoring and be useful for clinical muscle atrophy treatment. Liu L, Cui Y, Wu R, Yang J, Li Y. Mechanisms of rat gastrocnemius muscular atrophy induced by hindlimb unloading. Aerosp Med Hum Perform. 2026; 97(4):226-234.</p>","PeriodicalId":7463,"journal":{"name":"Aerospace medicine and human performance","volume":"97 4","pages":"226-234"},"PeriodicalIF":0.8,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147525328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Protein Marker ST2 and Myocardial Mapping of Cosmonauts After Spaceflight.","authors":"Anna G Goncharova, Ludmila H Pastushkova, Elena S Luchitskaya, Daria N Kashirina, Andrey M Nosovsky, Igor N Goncharov, Kirill S Kireev, Irina M Larina","doi":"10.3357/AMHP.6776.2026","DOIUrl":"10.3357/AMHP.6776.2026","url":null,"abstract":"<p><strong>Introduction: </strong>Cardiac remodeling can occur during spaceflights. This research aimed to study the relationship between the ST2 plasmatic biomarker and some cardiac MRI parameters of cosmonauts after 6- or 12-mo spaceflights.</p><p><strong>Methods: </strong>Venous blood for ST2 level assessment from nine Russian cosmonauts was collected 30 d before launch and on the first and seventh days after landing. The cardiac MRI sessions with T1- and T2-mapping of the heart were conducted before launch and on the fourth day after landing.</p><p><strong>Results: </strong>Variance analysis of the ST2 levels revealed a significant increase in all cosmonauts on the first day after spaceflight (P = 0.014). On the seventh day after landing the ST2 level decreased, approaching background values. On the fourth day after landing, the MRI mapping showed structural changes in the myocardial segments that corresponded to the g-load vectors during landing.</p><p><strong>Discussion: </strong>Our findings indicate a transient myocardial over-distention upon landing, as well as an increased risk of cardiac fibrosis after spaceflight. Goncharova AG, Pastushkova LH, Luchitskaya ES, Kashirina DN, Nosovsky AM, Goncharov IN, Kireev KS, Larina IM. Protein marker ST2 and myocardial mapping of cosmonauts after spaceflight. Aerosp Med Hum Perform. 2026; 97(4):243-248.</p>","PeriodicalId":7463,"journal":{"name":"Aerospace medicine and human performance","volume":"97 4","pages":"243-248"},"PeriodicalIF":0.8,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147525265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Streamlining NASA Task Load Index for Simulated Fighter Missions.","authors":"Heikki Mansikka, Kai Virtanen","doi":"10.3357/AMHP.6817.2026","DOIUrl":"10.3357/AMHP.6817.2026","url":null,"abstract":"<p><strong>Introduction: </strong>Mental workload (MWL) is a key factor in fighter pilot training, yet the widely used NASA Task Load Index (NASA-TLX) may contain dimensions that are less relevant when pilot training is conducted in a simulator. This study examined whether the number of dimensions required to assess MWL could be reduced without compromising the validity of the NASA-TLX.</p><p><strong>Methods: </strong>NASA-TLX data were collected from 716 high-fidelity F/A-18 simulator missions flown by 20 combat-ready pilots across several different exercises. Pilots provided weights for workload dimensions prior to missions and completed postmission ratings of the dimensions. Analyses included descriptive statistics of weights and scores, principal component analysis, and rank-based correlations between overall workload estimates computed from reduced-dimension composites and those based on all six workload dimensions.</p><p><strong>Results: </strong>Mental demand received the highest weight, while physical demand was consistently lowest. Principal component analysis revealed two components: a cognitive-emotional factor (mental, temporal, frustration) and a performance-effort factor (own performance, effort). Physical demand showed low communality and negligible loadings. Correlation analyses demonstrated that a three-dimensional composite (mental, temporal, frustration) closely reproduced the overall workload determined using six dimensions, while adding own performance and effort further improved correspondence.</p><p><strong>Discussion: </strong>The findings indicate that the NASA-TLX can be streamlined for simulated fighter missions by omitting the physical demand dimension and, when brevity is essential, by using three dimensions (mental, temporal, frustration) without substantial loss of validity. This approach reduces pilot burden and simplifies administration, supporting efficient MWL assessment in training contexts. Mansikka H, Virtanen K. Streamlining NASA task load index for simulated fighter missions. Aerosp Med Hum Perform. 2026; 97(4):279-283.</p>","PeriodicalId":7463,"journal":{"name":"Aerospace medicine and human performance","volume":"97 4","pages":"279-283"},"PeriodicalIF":0.8,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147525199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reorganization of Human Gait and Foot Pressure Patterns After 1-Week Dry Immersion.","authors":"Alina Saveko, Maria Bekreneva, Ivan Ponomarev, Tatiana Shigueva, Ilya Rukavishnikov, Elena Tomilovskaya","doi":"10.3357/AMHP.6796.2026","DOIUrl":"10.3357/AMHP.6796.2026","url":null,"abstract":"<p><strong>Introduction: </strong>Dry immersion (DI) is a ground-based model of simulated weightlessness that reduces support and proprioceptive input. This model produces reversible sensorimotor deconditioning and allows simulation of the early acute readaptation phase after spaceflight. We aimed to determine changes in spatiotemporal gait parameters and shin muscle work resulting from 7 d of DI, and whether plantar pressure distribution shifts accompany these changes.</p><p><strong>Methods: </strong>A total of 28 healthy males (14 DI, 14 controls) completed overground walking tests twice pre-DI and 2-3 h post-DI at first standing. Spatiotemporal parameters and plantar pressure (10 zones) were recorded. Surface electromyography [tibialis anterior, gastrocnemius (caput laterale), soleus] was sampled at 2000 Hz; the root mean square of electromyography was computed over phase-relevant intervals.</p><p><strong>Results: </strong>After DI, walking speed, step frequency, and step length decreased by 19.6%, 8.3%, and 12.3%, respectively. The stance phase increased (≈2% of gait cycle) due to longer double support. Plantar pressure showed posterior-lateral redistribution: reduced loading at the toes and medial forefoot, with increased loading at the heel; lateral forefoot changes showed trends in some subjects. Root mean square electromyography increased in all recorded muscles.</p><p><strong>Discussion: </strong>The results obtained are consistent with previous findings after spaceflight and its ground-based models. At the same time, they extend existing knowledge by adding new data on changes in plantar pressure distribution. These alterations may represent both the consequence and the target of locomotor strategies that compensate for gait instability. These findings clarify locomotor risks after short spaceflights. Saveko A, Bekreneva M, Ponomarev I, Shigueva T, Rukavishnikov I, Tomilovskaya E. Reorganization of human gait and foot pressure patterns after 1-week dry immersion. Aerosp Med Hum Perform. 2026; 97(4):235-242.</p>","PeriodicalId":7463,"journal":{"name":"Aerospace medicine and human performance","volume":"97 4","pages":"235-242"},"PeriodicalIF":0.8,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147525227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}