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      Composición Corporal y Capacidad Física en Pacientes con COVID-19 Hospitalizados en una Unidad de Cuidados Intensivos Translated title: Body Composition and Physical Capacity in Patients with COVID-19 Hospitalized in a Intensive Care Unit

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          Abstract

          RESUMEN: Las unidades de cuidados intensivos (UCI) y agudos han sido los contenedores del avance de la pandemia por COVID-19. Sin embargo, la estadía prolongada en esta unidad puede repercutir sobre la composición corporal (CC) y la capacidad derealizar ejercicio de los pacientes. El objetivo de esta investigación fue determinar si existe relación entre composición corporal (CC) y la prueba de caminata en 6 minutos (PC6m). Se reclutaron 17 personas (8 mujeres y 9 hombres). Se tomaron las siguientes medidas: PC6m, se consideró su distancia recorrida (DRPC6m) y su velocidad (VelPC6m). Las variables de CC medidas fueron índice de masa corporal (IMC), masa grasa (MG), masa libre de grasa (MLG) y masa magra (MM). La DRPC6m sólo mostró relación significativa con la MM corporal (MMC). Por otra parte, la VelPC6m tuvo una relación significativa con la MMC. Además de esto, la MLG del miembro inferior derecho y la MLG del miembro inferior izquierdo mostraron una relación con la VelPC6m (r=0,422; p=0,041 y r=0,417; p=0,025, respectivamente). También la MM del miembro inferior derecho y la MM del miembro inferior izquierdo se relacionaron significativamente con la VelPC6m (r=0,422; p=0,030 y r=0,420; p=0,042). En conclusión, existe relación entre composición corporal y VelPC6m. Esto permitiría aproximarse de manera rápida al nivel de funcionalidad con la que ingresa un paciente a un programa de rehabilitación.

          Translated abstract

          SUMMARY: The intensive care units (ICU) and acute care units have been the containers for the advance of the COVID-19 pandemic. However, prolonged stay in this unit can impact patients' body composition (WC) and ability to exercise. This research aimed to determine if there is a relationship between body composition (BC) and the 6-minute walk test (6mWT). 17 people were recruited (8 women and 9 men). The following measurements were taken: 6mWT, its distance traveled (6mWTDT) and its speed (6mWTS) were considered. The WC variables measured were body mass index (BMI), fat mass (FM), fat-free mass (FFM), and lean mass (LM). 6mWTDT only showed a significant relationship with body LM (BLM). On the other hand, 6mWTS had a significant relationship with BLM. In addition to this, the FFM of the right lower limb and the FFM of the left lower limb showed a relationship with 6mWTS (r=0.422; p=0.041 and r=0.417; p=0.025, respectively). Also, the LM of the right lower limb and the LM of the left lower limb were significantly related to the 6mWTS (r=0.422; p=0.030 and r=0.420; p=0.042). In conclusion, there is a relationship between body composition and 6mWTS. This would allow us to quickly approach the level of functionality with which a patient enters a rehabilitation program.

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          Reduced physical activity increases intermuscular adipose tissue in healthy young adults.

          Recent findings suggest that higher levels of intermuscular adipose tissue (IMAT) are associated with glucose dysregulation, lower levels of muscle strength, and a heightened risk of disability. Although several studies have described adaptations in muscle after reduced physical activity, the change in IMAT in healthy young adults is unknown. The objective was to determine whether reduced lower limb activity alters IMAT in healthy young adults and to assess whether this change affects muscle strength loss. The subjects (6 men and 12 women aged 19-28 y) underwent a 4-wk control period, which was followed by 4 wk of unilateral lower limb suspension. Volumes of whole muscle, subcutaneous adipose tissue, and IMAT were assessed by using magnetic resonance imaging in the thigh and calf. Muscle strength was assessed during maximal voluntary isometric contractions. No changes were observed in the control period. Reduced physical activity decreased thigh and calf muscle volumes by 7.4% and 7.9% (P < 0.001), respectively; no significant change in subcutaneous adipose tissue was observed. Additionally, IMAT increased in both regions; the increase was larger in the calf (20%) than in the thigh (14.5%) (P
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            Nutritional Status is Related to Fat-Free Mass, Exercise Capacity and Inspiratory Strength in Severe Chronic Obstructive Pulmonary Disease Patients

            INTRODUCTION: Being overweight or obese is associated with a higher rate of survival in patients with advanced chronic obstructive pulmonary disease (COPD). This paradoxical relationship indicates that the influence of nutritional status on functional parameters should be further investigated. OBJECTIVE: To investigate the impact of nutritional status on body composition, exercise capacity and respiratory muscle strength in severe chronic obstructive pulmonary disease patients. METHODS: Thirty-two patients (nine women) were divided into three groups according to their body mass indices (BMI): overweight/obese (25 ≤ BMI ≤ 34.9 kg/m2, n=8), normal weight (18.5 ≤ BMI ≤ 24.9 kg/m2, n=17) and underweight (BMI <18.5 kg/m2, n=7). Spirometry, bioelectrical impedance, a six-minute walking distance test and maximal inspiratory and expiratory pressures were assessed. RESULTS: Airway obstruction was similar among the groups (p=0.30); however, overweight/obese patients had a higher fat-free mass (FFM) index [FFMI=FFM/body weight2 (mean±SEM: 17±0.3 vs. 15±0.3 vs. 14±0.5 m/kg2, p<0.01)], exercise capacity (90±8 vs. 79±6 vs. 57±8 m, p=0.02) and maximal inspiratory pressure (63±7 vs. 57±5 vs. 35±8 % predicted, p=0.03) in comparison to normal weight and underweight patients, respectively. In addition, on backward multiple regression analysis, FFMI was the unique independent predictor of exercise capacity (partial r=0.52, p<0.01). CONCLUSIONS: Severe chronic obstructive pulmonary disease (COPD) patients who were overweight or obese had a greater FFM, exercise capacity and inspiratory muscle strength than patients with the same degree of airflow obstruction who were of normal weight or underweight, and higher FFM was independently associated with higher exercise capacity. These characteristics of overweight or obese patients might counteract the drawbacks of excess weight and lead to an improved prognosis in COPD.
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              Bed Rest, Exercise Countermeasure and Reconditioning Effects on the Human Resting Muscle Tone System

              The human resting muscle tone (HRMT) system provides structural and functional support to skeletal muscle and associated myofascial structures (tendons, fascia) in normal life. Little information is available on changes to the HRMT in bed rest. A set of dynamic oscillation mechanosignals ([Hz], [N/m], log decrement, [ms]) collected and computed by a hand-held digital palpation device (MyotonPRO) were used to study changes in tone and in key biomechanical and viscoelastic properties in global and postural skeletal muscle tendons and fascia from a non-exercise control (CTR) and an exercise (JUMP) group performing reactive jumps on a customized sledge system during a 60 days head-down tilt bed rest (RSL Study 2015–2016). A set of baseline and differential natural oscillation signal patterns were identified as key determinants in resting muscle and myofascial structures from back, thigh, calf, patellar and Achilles tendon, and plantar fascia. The greatest changes were found in thigh and calf muscle and tendon, with little change in the shoulder muscles. Functional tests (one leg jumps, electromyography) showed only trends in relevant leg muscle groups. Increased anti-Collagen-I immunoreactivity found in CTR soleus biopsy cryosections was absent from JUMP. Results allow for a muscle health status definition after chronic disuse in bed rest without and with countermeasure, and following reconditioning. Findings improve our understanding of structural and functional responses of the HRMT to disuse and exercise, may help to guide treatment in various clinical settings (e.g., muscle tone disorders, neuro-rehabilitation), and promote monitoring of muscle health and training status in personalized sport and space medicine.
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                Author and article information

                Journal
                ijmorphol
                International Journal of Morphology
                Int. J. Morphol.
                Sociedad Chilena de Anatomía (Temuco, , Chile )
                0717-9502
                April 2024
                : 42
                : 2
                : 479-482
                Affiliations
                [5] Valparaíso Valparaíso orgnamePontificia Universidad Católica de Valparaíso orgdiv1Instituto de Biología orgdiv2Laboratory of Morphological Sciences Chile
                [6] Talca Maule orgnameUniversidad Católica del Maule orgdiv1Departamento de Kinesiología orgdiv2Laboratorio de Función Disfunción Ventilatoria Chile
                [1] Santiago orgnameHospital El Carmen orgdiv1Servicio de Medicina Física y Rehabilitación Chile
                [4] Temuco Araucanía orgnameUniversidad de La Frontera orgdiv1Centro de Excelencia en Estudios Morfológicos y Quirúrgicos Chile
                [3] Santiago Santiago de Chile orgnameUniversidad de Santiago de Chile orgdiv1Escuela de Kinesiología Chile
                [7] Temuco Santiago de Chile orgnameUniversidad Mayor orgdiv1Facultad de Medicina y Ciencias de la Salud orgdiv2Escuela de Obstetricia y Puericultura Chile
                [2] Temuco Araucanía orgnameUniversidad de La Frontera orgdiv1Posdoctorado en Ciencias Morfológicas Chile
                Article
                S0717-95022024000200479 S0717-9502(24)04200200479
                de07f783-2833-4311-9ab5-8610329fa823

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 08 February 2024
                : 27 December 2023
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 14, Pages: 4
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                SciELO Chile

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                ARTÍCULOS

                prueba de caminata en 6 minutos,COVID-19,Body composition,6-minute walk test,Rehabilitation,composición corporal,rehabilitación

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