keyword
https://read.qxmd.com/read/38171353/acute-responses-to-repeated-sprint%C3%A2-training-in-hypoxia-combined-with-whole-body-cryotherapy-a-preliminary-study
#21
JOURNAL ARTICLE
Thibaud Mihailovic, Alain Groslambert, Romain Bouzigon, Simon Feaud, Grégoire P Millet, Philippe Gimenez
PURPOSE: This study aimed to investigate acute psychophysiological responses to repeated-sprint training in hypoxia (RSH) combined with whole-body cryotherapy (WBC). METHOD: Sixteen trained cyclists performed 3 sessions in randomized order: RSH, WBC-RSH (WBC pre-RSH), and RSH-WBC (WBC post-RSH). RSH consisted of 3 sets of 5 × 10-second sprints with 20-second recovery at a simulated altitude of 3000 m. Power output, muscle oxygenation (tissue saturation index), heart-rate variability, and recovery perception were analyzed...
January 3, 2024: International Journal of Sports Physiology and Performance
https://read.qxmd.com/read/38170057/the-importance-of-personalization-in-high-altitude-protocols-for-hematologic-and-metabolic-benefits-in-sports-a-multi-dimensional-n-of-1-case-study
#22
Loukia Lili, Cem Meydan, Nate Rickard, Bodi Zhang
The hematologic and metabolic benefits of high altitude exposure have been extensively studied in athletes due to their promising performance enhancing effects. However, despite the increased research and development of various high altitude protocols for achieving peak performance, the reproducibility of the results at the individual level remains sparse. To systematically address this limitation and establish a more effective method to achieve consistent results at the individual level, we conducted a multi-dimensional study of one elite endurance athlete in two Phases...
January 15, 2024: Heliyon
https://read.qxmd.com/read/38163230/sleep-at-high-altitude-a-bibliometric-study-and-visualization-analysis-from-1992-to-2022
#23
JOURNAL ARTICLE
Lixia Tan, Yong Li, Hongxiu Chen, Gongga Lanzi, Xiuying Hu
BACKGROUND: As an important monitoring index for adaptation to hypoxia, sleep may reflect the adaptive state of the body at high altitudes. The literature has shown a link between altitude and sleep problems, and sleep changes have become a common problem for individuals at high altitudes, negatively impacting their physical and mental health. As research on high-altitude sleep has gained attention in recent years, the publishing volume has increased worldwide, necessitating a more comprehensive understanding of this field...
January 15, 2024: Heliyon
https://read.qxmd.com/read/38158567/personal-hypoxia-symptoms-vary-widely-within-individuals
#24
JOURNAL ARTICLE
Brennan D Cox, Daniel G McHail, Kara J Blacker
INTRODUCTION: Exposure to high ambient altitudes above 10,000 ft (3048 m) over sea level during aviation can present the risk of hypobaric hypoxia. Hypoxia can impair sensory and cognitive functions, degrading performance and leading to mishaps. Military aircrew undergo regular hypoxia familiarization training to recognize their symptoms and understand the consequences of hypoxia. However, over the years, aviators have come to believe that individuals have a "personal hypoxia signature." The idea is that intraindividual variability in symptom experience during repeated exposure is low...
January 1, 2024: Aerospace Medicine and Human Performance
https://read.qxmd.com/read/38127802/aerobic-exercise-training-under-normobaric-hypoxic-conditions-to-improve-glucose-and-lipid-metabolism-in-overweight-and-obese-individuals-a-systematic-review-and-meta-analysis
#25
JOURNAL ARTICLE
Hai Guo, Linjie Cheng, Dilihumaier Duolikun, Qiaoling Yao
Guo, Hai, Linjie Cheng, Dilihumaier Duolikun, and Qiaoling Yao. Aerobic exercise training under normobaric hypoxic conditions to improve glucose and lipid metabolism in overweight and obese individuals: a systematic review and meta-analysis. High Alt Med Biol. 24:312-320, 2023. Background: Obesity is a critical public health issue around the world, reaching epidemic proportions in some countries. However, only a few studies have examined the effects of hypoxic training on metabolic parameters in an obese population...
December 2023: High Altitude Medicine & Biology
https://read.qxmd.com/read/38124211/intermittent-hypobaric-hypoxia-ameliorates-autistic-like-phenotypes-in-mice
#26
JOURNAL ARTICLE
Yi-da Pan, Yuan Zhang, Wen-Ying Zheng, Min-Zhen Zhu, Huan-Yu Li, Wen-Jie Ouyang, Qin-Qing Wen, Xin-Hong Zhu
Autism spectrum disorder (ASD) is a neurodevelopmental condition characterized by persistent deficits in social communication and stereotyped behaviors. Although major advances in basic research on autism have been achieved in the past decade, and behavioral interventions can mitigate the difficulties that individuals with autism experience, little is known about the many fundamental issues of the interventions, and no specific medication has demonstrated efficiency for the core symptoms of ASD. Intermittent hypobaric hypoxia (IHH) is characterized by repeated exposure to lowered atmospheric pressure and oxygen levels, which triggers multiple physiological adaptations in the body...
December 19, 2023: Journal of Neuroscience
https://read.qxmd.com/read/38107789/physiological-and-performance-effects-of-live-high-train-low-altitude-training-for-elite-endurance-athletes-a-narrative-review
#27
REVIEW
G Bonato, S P J Goodman, Lathlean Tjh
Altitude training has become an important training application for athletes due its potential for altering physiology and enhancing performance. This practice is commonly used by athletes, with a popular choice being the live high - train low approach. This model recommends that athletes live at high altitude (1250-3000 m), but train at low altitude or sea-level (0-1200 m). Exposure to altitude often leads to hypoxic stress and in turn stimulates changes in total haemoglobin mass, erythropoietin, and soluble transferrin receptors, which alter further underlying physiology...
2023: Current research in physiology
https://read.qxmd.com/read/38104062/spatio-temporal-modeling-of-human-leptospirosis-prevalence-using-the-maximum-entropy-model
#28
JOURNAL ARTICLE
Reza Shirzad, Ali Asghar Alesheikh, Mojtaba Asgharzadeh, Benyamin Hoseini, Aynaz Lotfata
BACKGROUND: Leptospirosis, a zoonotic disease, stands as one of the prevailing health issues in some tropical areas of Iran. Over a decade, its incidence rate has been estimated at approximately 2.33 cases per 10,000 individuals. Our research focused on analyzing the spatiotemporal clustering of Leptospirosis and developing a disease prevalence model as an essential focal point for public health policymakers, urging targeted interventions and strategies. METHODS: The SaTScan and Maximum Entropy (MaxEnt) modeling methods were used to find the spatiotemporal clusters of the Leptospirosis and model the disease prevalence in Iran...
December 16, 2023: BMC Public Health
https://read.qxmd.com/read/38098150/iron-absorption-in-highly-trained-male-runners-does-it-matter-when-and-where-you-eat-your-iron
#29
JOURNAL ARTICLE
Alannah K A McKay, Bryce Anderson, Peter Peeling, Jamie Whitfield, Nicolin Tee, Christophe Zeder, Michael B Zimmermann, Louise M Burke, Diego Moretti
PURPOSE: We examined iron absorption and its regulation during two common scenarios experienced by endurance athletes. Our aims were to: (i) compare the effects of preexercise versus postexercise iron intake on iron absorption; and (ii) compare the impact of training at altitude (1800 m) on iron absorption preexercise. METHODS: Male runners (n = 18) completed three exercise trials over a 5-wk period, each preceded by 24 h of standardized low-iron diets. First, athletes completed two 60-min treadmill running trials at 65% V̇O2max at near sea-level (580 m)...
January 1, 2024: Medicine and Science in Sports and Exercise
https://read.qxmd.com/read/38089475/hepcidin-and-erythroferrone-response-to-3%C3%A2-weeks-of-exposure-to-normobaric-hypoxia-at-rest-in-trained-cyclists
#30
JOURNAL ARTICLE
Kamila Płoszczyca, Miłosz Czuba, Małgorzata Chalimoniuk, Konrad Witek, Marcin Baranowski
Purpose: The effectiveness of altitude training on haematological adaptations is largely dependent on iron metabolism. Hepcidin and erythroferrone (ERFE) are key iron-regulating hormones, yet their response to altitude training is poorly understood. The aim of this study was to analyze changes in hepcidin and ERFE under the influence of 3 weeks of the Live High-Train Low (LH-TL) method. Methods: Twenty male trained cyclists completed a 3-week training program under normoxic conditions (NORM) or with passive exposure to normobaric hypoxia (LH-TL; FiO2 = 16...
2023: Frontiers in Physiology
https://read.qxmd.com/read/38082199/recommendations-for-women-in-mountain-sports-and-hypoxia-training-conditioning
#31
REVIEW
Johannes Burtscher, Antoine Raberin, Franck Brocherie, Davide Malatesta, Giorgio Manferdelli, Tom Citherlet, Bastien Krumm, Nicolas Bourdillon, Juliana Antero, Letizia Rasica, Martin Burtscher, Grégoire P Millet
The (patho-)physiological responses to hypoxia are highly heterogeneous between individuals. In this review, we focused on the roles of sex differences, which emerge as important factors in the regulation of the body's reaction to hypoxia. Several aspects should be considered for future research on hypoxia-related sex differences, particularly altitude training and clinical applications of hypoxia, as these will affect the selection of the optimal dose regarding safety and efficiency. There are several implications, but there are no practical recommendations if/how women should behave differently from men to optimise the benefits or minimise the risks of these hypoxia-related practices...
December 12, 2023: Sports Medicine
https://read.qxmd.com/read/38011729/epidemiological-serological-and-entomological-investigation-of-new-visceral-leishmaniasis-foci-in-nepal
#32
JOURNAL ARTICLE
Anand Ballabh Joshi, Megha Raj Banjara, Murari Lal Das, Pragyan Ghale, Krishna Raj Pant, Uttam Raj Pyakurel, Gokarna Dahal, Krishna Prasad Paudel, Chuman Lal Das, Axel Kroeger, Abraham Aseffa
The aim of this study was to explore epidemiological, serological, entomological, and social aspects of visceral leishmaniasis (VL) in new foci in Nepal. The study was conducted in 11 villages of five districts that had been previously free of VL but that reported new cases between 2019 and 2021. We screened 1,288 inhabitants using rK39 tests and investigated the epidemiological and clinical characteristics of 12 recent VL cases. A total of 182 community members were interviewed about knowledge, attitude, and practices regarding VL...
November 27, 2023: American Journal of Tropical Medicine and Hygiene
https://read.qxmd.com/read/37939473/managing-uphill-cultivation-under-climate-change-an-assessment-of-adaptation-decisions-among-tribal-farmers-in-nagaland-state-of-india
#33
JOURNAL ARTICLE
Lea S Schröder, Amol K Bhalerao, Khondokar H Kabir, Jürgen Scheffran, Uwe A Schneider
Tribal farmers in the Himalayas are vulnerable to climatic changes, as their rain-fed cultivation systems, practiced on steep, sloping terrain, are susceptible to changes in rainfall while at the same time being the primary means of livelihood. Soil and water conservation practices (SWCP) can improve the resilience of these cultivation systems to adverse climatic conditions. However, little is known about adaptation within these tribal farming communities. This is the first empirical study on the adaptation decisions of tribal farmers in the Himalayan uplands of Northeast India...
November 6, 2023: Journal of Environmental Management
https://read.qxmd.com/read/37926144/chamber-attention-network-can-towards-accurate-diagnosis-of-pulmonary-artery-hypertension-using-echocardiography
#34
JOURNAL ARTICLE
Dezhi Sun, Yangyi Hu, Yunming Li, Xianbiao Yu, Xi Chen, Pan Shen, Xianglin Tang, Yihao Wang, Chengcai Lai, Bo Kang, Zhijie Bai, Zhexin Ni, Ningning Wang, Rui Wang, Lina Guan, Wei Zhou, Yue Gao
INTRODUCTION: Accurate identification of pulmonary arterial hypertension (PAH) in primary care and rural areas can be a challenging task. However, recent advancements in computer vision offer the potential for automated systems to detect PAH from echocardiography. OBJECTIVES: Our aim was to develop a precise and efficient diagnostic model for PAH tailored to the unique requirements of intelligent diagnosis, especially in challenging locales like high-altitude regions...
November 3, 2023: Journal of Advanced Research
https://read.qxmd.com/read/37923352/predictive-model-for-estimating-the-risk-of-high-altitude-pulmonary-edema-a-single-centre-retrospective-outcome-reporting-study
#35
JOURNAL ARTICLE
Yangzong Suona, Luobu Gesang, Zhuoga Danzeng, Bai Ci, Quzong Zhaxi, Ju Huang, Rui Zhang
OBJECTIVE: To develop the first prediction model based on the common clinical symptoms of high-altitude pulmonary edema (HAPE), enabling early identification and an easy-to-execute self-risk prediction tool. METHODS: A total of 614 patients who consulted People's Hospital of Tibet Autonomous Region between January 2014 and April 2022 were enrolled. Out of those, 508 patients (416 males and 92 females) were diagnosed with HAPE and 106 were patients without HAPE (33 females and 72 males)...
November 3, 2023: BMJ Open
https://read.qxmd.com/read/37902805/resistance-and-endurance-training-in-intermittent-hypoxia-reduce-body-fat-mass-and-blood-pressure
#36
JOURNAL ARTICLE
Aritz Urdampilleta, Juan Mielgo-Ayuso, Claudia Vielba-Trillo, Enrique Roche, Néstor Vicente-Salar
BACKGROUND: Hypoxia is an environmental condition that occurs in sports performed at high altitude. Adaptation to hypoxia is accompanied by changes in body composition and cardiac function that could impair sport performance in altitude. These changes concern mainly to a reduction in muscle mass and an increased heart rate. In this context, a resistance training protocol in a normobaric hypoxia chamber has been implemented. Therefore, the aim of this study was to study the changes in body composition and cardiovascular variables after a training period in intermittent hypoxia...
October 30, 2023: Journal of Sports Medicine and Physical Fitness
https://read.qxmd.com/read/37896441/development-of-multifunctional-detection-robot-for-roller-coaster-track
#37
JOURNAL ARTICLE
Weike Song, Zhao Zhao, Kun Zhang, Huajie Wang, Yifeng Sun
Recent advances in roller coasters accelerate the creation of complex tracks to provide stimulation and excitement for humans. As the main load-bearing component, tracks are prone to damage such as loose connecting bolts, paint peeling, corroded sleeper welds, corroded butt welds, reduced track wall thickness and surface cracks under complex environments and long-term alternating loads. However, inspection of the roller coaster tracks, especially the high-altitude rolling tracks, is a crucial problem that traditional manual detection methods have difficulty solving...
October 10, 2023: Sensors
https://read.qxmd.com/read/37887588/application-of-machine-learning-to-predict-covid-19-spread-via-an-optimized-bpso-model
#38
JOURNAL ARTICLE
Eman H Alkhammash, Sara Ahmad Assiri, Dalal M Nemenqani, Raad M M Althaqafi, Myriam Hadjouni, Faisal Saeed, Ahmed M Elshewey
During the pandemic of the coronavirus disease (COVID-19), statistics showed that the number of affected cases differed from one country to another and also from one city to another. Therefore, in this paper, we provide an enhanced model for predicting COVID-19 samples in different regions of Saudi Arabia (high-altitude and sea-level areas). The model is developed using several stages and was successfully trained and tested using two datasets that were collected from Taif city (high-altitude area) and Jeddah city (sea-level area) in Saudi Arabia...
September 28, 2023: Biomimetics
https://read.qxmd.com/read/37878211/use-of-buffers-in-specific-contexts-highly-trained-female-athletes-extreme-environments-and-combined-buffering-agents-a-narrative-review
#39
REVIEW
Amelia J Carr, Alannah K A McKay, Louise M Burke, Ella S Smith, Charles S Urwin, Lilia Convit, William T Jardine, Monica K Kelly, Bryan Saunders
This narrative review evaluated the evidence for buffering agents (sodium bicarbonate, sodium citrate and beta-alanine), with specific consideration of three discrete scenarios: female athletes, extreme environments and combined buffering agents. Studies were screened according to exclusion and inclusion criteria and were analysed on three levels: (1) moderating variables (supplement dose and timing, and exercise test duration and intensity), (2) design factors (e.g., use of crossover or matched group study design, familiarisation trials) and (3) athlete-specific factors (recruitment of highly trained participants, buffering capacity and reported performance improvements)...
October 25, 2023: Sports Medicine
https://read.qxmd.com/read/37865721/comparing-neuronal-oscillations-during-visual-spatial-attention-orienting-between-normobaric-and-hypobaric-hypoxia
#40
JOURNAL ARTICLE
Evan A Hutcheon, Vasily A Vakorin, Adonay S Nunes, Urs Ribary, Sherri Ferguson, Victoria E Claydon, Sam M Doesburg
Normobaric hypoxia (NH) and hypobaric hypoxia (HH) are both used to train aircraft pilots to recognize symptoms of hypoxia. NH (low oxygen concentration) training is often preferred because it is more cost effective, simpler, and safer than HH. It is unclear, however, whether NH is neurophysiologically equivalent to HH (high altitude). Previous studies have shown that neural oscillations, particularly those in the alpha band (8-12 Hz), are impacted by hypoxia. Attention tasks have been shown to reliably modulate alpha oscillations, although the neurophysiological impacts of hypoxia during cognitive processing remains poorly understood...
October 21, 2023: Scientific Reports
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