Titre : Gravitation

Gravitation : Questions médicales fréquentes

Termes MeSH sélectionnés :

Accelerometry
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un problème lié à la gravitation ?", "position": 4, "acceptedAnswer": { "@type": "Answer", "text": "Des vertiges, des troubles de l'équilibre et des douleurs musculo-squelettiques." } }, { "@type": "Question", "name": "Comment la gravitation est-elle mesurée en milieu médical ?", "position": 5, "acceptedAnswer": { "@type": "Answer", "text": "Elle est mesurée par des capteurs et des dispositifs de surveillance en laboratoire." } }, { "@type": "Question", "name": "Quels symptômes sont liés à une exposition prolongée à la microgravité ?", "position": 6, "acceptedAnswer": { "@type": "Answer", "text": "Fatigue, perte de masse musculaire, troubles de la vision et désorientation." } }, { "@type": "Question", "name": "La gravitation peut-elle causer des douleurs articulaires ?", "position": 7, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des changements de pression et de gravité peuvent entraîner des douleurs articulaires." } }, { "@type": "Question", "name": "Quels effets la gravitation a-t-elle sur le système cardiovasculaire ?", "position": 8, "acceptedAnswer": { "@type": "Answer", "text": "Elle peut provoquer des modifications de la circulation sanguine et de la pression artérielle." } }, { "@type": "Question", "name": "Comment la gravitation affecte-t-elle le système nerveux ?", "position": 9, "acceptedAnswer": { "@type": "Answer", "text": "Elle peut entraîner des troubles de la coordination et des réflexes en microgravité." } }, { "@type": "Question", "name": "Quels symptômes psychologiques peuvent survenir en microgravité ?", "position": 10, "acceptedAnswer": { "@type": "Answer", "text": "Anxiété, dépression et troubles du sommeil sont fréquents en microgravité." } }, { "@type": "Question", "name": "Quelles mesures préventives peuvent réduire les risques liés à la gravitation ?", "position": 11, "acceptedAnswer": { "@type": "Answer", "text": "Des exercices réguliers et une alimentation équilibrée sont essentiels." } }, { "@type": "Question", "name": "Comment les astronautes se préparent-ils aux effets de la gravitation ?", "position": 12, "acceptedAnswer": { "@type": "Answer", "text": "Ils suivent des programmes d'entraînement physique et des simulations de microgravité." } }, { "@type": "Question", "name": "Quels conseils de santé sont donnés aux personnes en microgravité ?", "position": 13, "acceptedAnswer": { "@type": "Answer", "text": "Hydratation, exercices quotidiens et suivi médical régulier sont recommandés." } }, { "@type": "Question", "name": "La formation en gravité zéro est-elle nécessaire pour les astronautes ?", "position": 14, "acceptedAnswer": { "@type": "Answer", "text": "Oui, elle est cruciale pour préparer le corps aux défis de la microgravité." } }, { "@type": "Question", "name": "Quels équipements sont utilisés pour prévenir les effets de la gravitation ?", "position": 15, "acceptedAnswer": { "@type": "Answer", "text": "Des dispositifs de résistance et des simulateurs de gravité sont utilisés." } }, { "@type": "Question", "name": "Quels traitements sont disponibles pour les effets de la microgravité ?", "position": 16, "acceptedAnswer": { "@type": "Answer", "text": "La rééducation physique, la thérapie par l'exercice et des suppléments nutritionnels." } }, { "@type": "Question", "name": "Comment prévenir les effets négatifs de la gravitation en médecine spatiale ?", "position": 17, "acceptedAnswer": { "@type": "Answer", "text": "Des programmes d'exercice et des régimes alimentaires adaptés sont recommandés." } }, { "@type": "Question", "name": "Les médicaments peuvent-ils aider à contrer les effets de la gravitation ?", "position": 18, "acceptedAnswer": { "@type": "Answer", "text": "Oui, certains médicaments peuvent soulager les symptômes liés à la gravité." } }, { "@type": "Question", "name": "Quelles thérapies sont efficaces pour les troubles d'équilibre ?", "position": 19, "acceptedAnswer": { "@type": "Answer", "text": "La thérapie vestibulaire et les exercices de rééducation sont souvent utilisés." } }, { "@type": "Question", "name": "Comment la nutrition peut-elle aider en cas de troubles liés à la gravitation ?", "position": 20, "acceptedAnswer": { "@type": "Answer", "text": "Une nutrition adéquate soutient la santé musculaire et osseuse en microgravité." } }, { "@type": "Question", "name": "Quelles complications peuvent survenir en microgravité ?", "position": 21, "acceptedAnswer": { "@type": "Answer", "text": "Atrophie musculaire, perte osseuse et troubles cardiovasculaires sont possibles." } }, { "@type": "Question", "name": "Les troubles de la vision sont-ils une complication de la microgravité ?", "position": 22, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des changements de pression intracrânienne peuvent affecter la vision." } }, { "@type": "Question", "name": "Comment la gravitation influence-t-elle les maladies chroniques ?", "position": 23, "acceptedAnswer": { "@type": "Answer", "text": "Elle peut aggraver certaines maladies chroniques, comme l'ostéoporose." } }, { "@type": "Question", "name": "Quelles sont les conséquences psychologiques de la gravitation ?", "position": 24, "acceptedAnswer": { "@type": "Answer", "text": "Isolement et stress peuvent entraîner des troubles psychologiques en microgravité." } }, { "@type": "Question", "name": "Les effets de la gravitation peuvent-ils être réversibles ?", "position": 25, "acceptedAnswer": { "@type": "Answer", "text": "Oui, avec un traitement approprié et des exercices, de nombreux effets peuvent être inversés." } }, { "@type": "Question", "name": "Quels facteurs augmentent les risques liés à la gravitation ?", "position": 26, "acceptedAnswer": { "@type": "Answer", "text": "L'âge, la condition physique et des antécédents médicaux peuvent augmenter les risques." } }, { "@type": "Question", "name": "Les personnes âgées sont-elles plus vulnérables aux effets de la gravitation ?", "position": 27, "acceptedAnswer": { "@type": "Answer", "text": "Oui, elles peuvent avoir une plus grande susceptibilité aux troubles musculo-squelettiques." } }, { "@type": "Question", "name": "Comment le mode de vie influence-t-il les risques liés à la gravitation ?", "position": 28, "acceptedAnswer": { "@type": "Answer", "text": "Un mode de vie sédentaire augmente le risque de complications liées à la gravité." } }, { "@type": "Question", "name": "Les antécédents médicaux jouent-ils un rôle dans les risques de gravitation ?", "position": 29, "acceptedAnswer": { "@type": "Answer", "text": "Oui, des conditions comme l'ostéoporose ou les maladies cardiovasculaires augmentent les risques." } }, { "@type": "Question", "name": "Les astronautes ont-ils des facteurs de risque spécifiques ?", "position": 30, "acceptedAnswer": { "@type": "Answer", "text": "Oui, leur exposition prolongée à la microgravité les rend plus susceptibles à divers troubles." } } ] } ] }

Sources (719 au total)

Comparison of Accelerometry-Based Measures of Physical Activity: Retrospective Observational Data Analysis Study.

Given the evolution of processing and analysis methods for accelerometry data over the past decade, it is important to understand how newer summary measures of physical activity compare with establish... We aimed to compare objective measures of physical activity to increase the generalizability and translation of findings of studies that use accelerometry-based data.... High-resolution accelerometry data from the Baltimore Longitudinal Study on Aging were retrospectively analyzed. Data from 655 participants who used a wrist-worn ActiGraph GT9X device continuously for... Data were from a sample (N=655; male: n=298, 45.5%; female: n=357, 54.5%) with a mean age of 69.8 years (SD 14.2) and mean BMI of 27.3 kg/m2 (SD 5.0). The mean marginal participant-specific correlatio... The findings from this comparison of accelerometry-based measures of physical activity can be used by researchers and facilitate the extension of knowledge from existing literature by demonstrating th...

Composite activity type and stride-specific energy expenditure estimation model for thigh-worn accelerometry.

Accurately measuring energy expenditure during physical activity outside of the laboratory is challenging, especially on a large scale. Thigh-worn accelerometers have gained popularity due to the poss... We first trained a supervised deep learning activity classification model using pooled data from available adult accelerometer datasets. The composite energy expenditure model was then developed and v... The activity classification model showed an overall accuracy of 99.7% across all five activity types during validation. The composite model for estimating energy expenditure achieved a mean absolute p... The integration of thigh-worn accelerometers with machine learning models provides a highly accurate method for classifying physical activity types and estimating energy expenditure. Our novel composi...

Sedentary behaviors and physical activity of the working population measured by accelerometry: a systematic review and meta-analysis.

Too much sedentary behavior (SB) and too little physical activity (PA) place adult workers at risk for chronic illness. It remains unclear which occupations and subgroups within occupations have the h... A literature search of six databases was performed for relevant studies published through March 2023. Eligible studies were in English, targeted working populations, had a sample size > 75, and object... We found that 63% of the studies reported daily time spent in SB and in MVPA, but fewer reported LPA, moderate PA, and vigorous PA. The average time spent in SB was 553.34 min/day, in LPA was 299.77 m... More research is needed to explore SB and PA patterns within occupational subgroups. Additionally, it is important to explore work-related individual (e.g., job task), interpersonal (e.g., social supp...

Accelerometer-measured physical activity and postmenopausal breast cancer incidence in the Women's Health Accelerometry Collaboration.

Few studies have examined accelerometer-measured physical activity and incident breast cancer (BC). Thus, this study examined associations between accelerometer-measured vector magnitude counts per 15... The WHAC comprised 21,089 postmenopausal women (15,375 from the Women's Health Study [WHS]; 5714 from the Women's Health Initiative Objective Physical Activity and Cardiovascular Health Study [OPACH])... In covariate-adjusted models, the highest (vs. lowest) tertiles of VM/15s, TPA, LPA, and MVPA were associated with BC HRs of 0.80 (95% CI, 0.64-0.99), 0.84 (95% CI, 0.69-1.02), 0.89 (95% CI, 0.73-1.08... Greater levels of accelerometer-assessed PA were associated with lower BC risk. Associations varied by age and obesity and were not independent of BMI or physical function....

Use of accelerometry to investigate standing and dynamic body balance in people with cerebral palsy: A systematic review.

People with cerebral palsy (CP) often have difficulties related to maintaining body balance in their daily living activities. Accelerometers are low-cost wearable devices with potential use to objecti... What are the main characteristics and findings from protocols used in research aiming to investigate standing or dynamic body balance stability through trunk accelerometry in people with CP?... We searched in December 2021 seven databases, Pubmed, Embase, Cochrane, Science Direct, Scopus, PEDro, and Lilacs, with descriptors related to cerebral palsy, accelerometer, and balance.... Ten studies were included, with a total of 197 evaluated people with CP. These studies were classified as moderate or high methodological quality. We found convergence on the use of the sensor at the ... Trunk accelerometry in quiet posture and dynamic tasks was shown to be a valid and sensitive measurement to evaluate balance stability in children and adolescents with CP. It is a small, light, low-co...