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INTRODUCTION: Aging is accompanied by changes in body composition, such as an increase in fat mass (FM), a decrease in skeletal muscle mass index (SMMI) and muscle strength, combined with a chronic inflammatory process (CI). OBJECTIVE: Determine the relationship between age and excess body fat with markers of chronic inflammation, skeletal muscle mass and strength. METHODS: A cross-sectional alitical study was carried out in a convenience sample of adults 45 to 59 years old (n = 100) and older adults 60 to 74 years old (n = 133). All participants had their body composition measured with an impedance meter. They were subsequently divided into two groups: (i) with excess fat (WEF), (ii) without excess fat (NEF), in order to relate excess fat and age with inflammation, muscle mass and strength. RESULTS: NEF adults and older adults had similar values of SMMI (9.1 ± 1.5 vs. 8.8 ± 1.3, p > 0.05) and strength (28 ± 8 vs. 27 ± 8.6, p > 0.05). Likewise, WEF adults showed significantly lower values than NEF adults in the SMMI (7.9 ± 0.8 vs. 9.1 ± 1.5, p < 0.05) and strength (28 ± 8 vs. 22 ± 5, p < 0.001). Also, WEF older adults presented significantly lower values in the SMMI (15.9 ± 1.8 vs. 22.8 ± 5.1, p < 0.05) and strength (17.9 ± 4.8 vs. 27 ± 8.6, p < 0.001). CONCLUSIONS: Our findings suggest that excess fat mass is a risk factor that has a significantly greater influence than aging per se on the index of skeletal muscle mass and strength.
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OBJECTIVES: To estimate the prevalence of dynapenia, presarcopenia, and sarcopenia in a Mexican community using two different cutoffs. MATERIALS AND METHODS: This cross-sectional study included 724 subjects (521 women and 203 men) adults ≥ 50 years community-dwelling from Mexico City. We determined the prevalence of different muscle-related syndromes. Muscle strength was measured with handgrip strength and muscle mass was estimated by bioelectrical impedance. For the diagnosis of sarcopenia and presarcopenia, two criteria were used: (1) the cut-off points proposed by the European Working Group on Sarcopenia in Older People (EWGSOP) and (2) the cut-off points less than two standard deviations for gender-specific mean of Mexicans young adults. RESULTS: Muscle mass decreases with age, but not as rapid as muscle strength. With the specific Mexican cut-off points, the general prevalences were: 27.4% for dynapenia (n = 199), 12.8% for presarcopenia (n = 93), and 6.6% for sarcopenia (n = 48). In contrast, the prevalences were higher when we used the cut-off points for Caucasians (EWGSOP): 33.9% for dynapenia (n = 246), 38.1% for presarcopenia (n = 276), and 15.2% for sarcopenia (n = 110). CONCLUSIONS: Diagnoses of dynapenia, presarcopenia, and sarcopenia should be estimated from cut-off points of the specific population; otherwise, it might be overestimated or underestimated. Early diagnosis of any of these conditions in community can prevent the occurrence of adverse effects.
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INTRODUCTION: Nutritional therapy in heart failure (HF) patients has been focused on fluid and sodium restriction with the aim of decreasing volume overload. However, these recommendations are not well established and sometimes controversial. OBJECTIVE: To evaluate the effect of the consumption of a low-carbohydrate diet on oxygen saturation, body composition and clinical variables during two months of follow-up in chronic, stable heart failure patients. METHODS: In a parallel group randomized controlled clinical trial, 88 ambulatory patients were randomly assigned to a low-carbohydrate diet group (40% carbohydrates, 20% protein and 40% fats [12% saturated, 18% monounsaturated and 10% polyunsaturated]) or a standard diet group (50% carbohydrates, 20% protein and 30% fats [10% saturated, 10% monounsaturated and 10% polyunsaturated]) for two months. Diets were normocaloric in both groups. At baseline and at two months of follow-up, the variables evaluated were: oxygen saturation, dietary intake, body composition and handgrip strength. RESULTS: After two months of follow-up, the low-carbohydrate diet group decreased the carbohydrate consumption and had improved oxygen saturation (93.0 ±4.4 to 94.6 ± 3.2, p = 0.02), while the standard diet group had decreased (94.90 ± 2.4 to 94.0 ± 2.9, p = 0.03). There were also differences between the groups at the end of the study (p = 0.04). No significant differences showed in handgrip strength in both groups, low-carbohydrate diet group (26.4 ± 8.3 to 27.2 ± 8.3 kg, p = 0.07) and standard diet group (25.4 ± 8.9 to 26.1 ± 9.5 kg, p = 0.14). CONCLUSIONS: Low-carbohydrate diet may improve the oxygen saturation in patients with chronic stable heart failure.
Assuntos
Dieta com Restrição de Carboidratos , Insuficiência Cardíaca/dietoterapia , Oxigênio/sangue , Adulto , Idoso , Idoso de 80 Anos ou mais , Composição Corporal , Feminino , Força da Mão , Humanos , Masculino , Pessoa de Meia-Idade , Resultado do TratamentoRESUMO
Introduction: Nutritional therapy in heart failure (HF) patients has been focused on fluid and sodium restriction with the aim of decreasing volume overload. However, these recommendations are not well established and sometimes controversial. Objective: To evaluate the effect of the consumption of a low-carbohydrate diet on oxygen saturation, body composition and clinical variables during two months of follow-up in chronic, stable heart failure patients. Methods: In a parallel group randomized controlled clinical trial, 88 ambulatory patients were randomly assigned to a low-carbohydrate diet group (40% carbohydrates, 20% protein and 40% fats [12% saturated, 18% monounsaturated and 10% polyunsaturated]) or a standard diet group (50% carbohydrates, 20% protein and 30% fats [10% saturated, 10% monounsaturated and 10% polyunsaturated]) for two months. Diets were normocaloric in both groups. At baseline and at two months of follow-up, the variables evaluated were: oxygen saturation, dietary intake, body composition and handgrip strength. Results: After two months of follow-up, the low-carbohydrate diet group decreased the carbohydrate consumption and had improved oxygen saturation (93.0 ± 4.4 to 94.6 ± 3.2, p = 0.02), while the standard diet group had decreased (94.90 ± 2.4 to 94.0 ± 2.9, p = 0.03). There were also differences between the groups at the end of the study (p = 0.04). No significant differences showed in handgrip strength in both groups, low-carbohydrate diet group (26.4 ± 8.3 to 27.2 ± 8.3 kg, p = 0.07) and standard diet group (25.4 ± 8.9 to 26.1 ± 9.5 kg, p = 0.14). Conclusions: Low-carbohydrate diet may improve the oxygen saturation in patients with chronic stable heart failure (AU)
Introducción: la terapia nutricional en pacientes con insuficiencia cardiaca (IC) ha sido enfocada en la restricción de líquidos y de sodio con el objetivo de reducir la sobrecarga de volumen. Sin embargo, estas recomendaciones no están bien establecidas y en algunos casos son controvertidas. Objetivo: evaluar el efecto del consumo de una dieta baja en hidratos de carbono sobre la saturación de oxígeno, composición corporal y variables clínicas durante dos meses de seguimiento en pacientes con insuficiencia cardiaca estable. Métodos: ensayo clínico aleatorizado paralelo en 88 pacientes ambulatorios que fueron asignados aleatoriamente al grupo dieta baja en hidratos de carbono (40% hidratos de carbono, 20% proteínas y 40% lípidos [12% saturadas, 18% monoinsaturadas y 10% poliinsaturadas]) o al grupo dieta estándar (50% hidratos de carbono, 20% proteínas y 30% lípidos [10% saturadas, 10% monoinsaturadas y 10% poliinsaturadas]) por dos meses. Las dietas fueron normocalóricas en ambos grupos. En la medición basal y a los dos meses de seguimiento, las variables evaluadas fueron: saturación de oxígeno, ingesta dietética, composición corporal y fuerza de presión de mano. Resultados: después de dos meses de seguimiento, el grupo de dieta baja en hidratos de carbono disminuyó el consumo de hidratos de carbono y mejoró la saturación de oxígeno (93.0 ± 4.4 to 94.6 ± 3.2, p = 0.02), mientras que el grupo de dieta estándar disminuyó (94.90 ± 2.4 to 94.0 ± 2.9, p = 0.03). También se observó diferencia entre los grupos al fi nal del estudio (p = 0.04). No se observaron diferencias estadísticamente significativas en fuerza de mano en ambos grupos: dieta baja en hidratos de carbono (26.4 ± 8.3 to 27.2 ± 8.3 kg, p = 0.07) y dieta estándar (25.4 ± 8.9 to 26.1 ± 9.5 kg, p = 0.14). Conclusiones: la dieta baja en hidratos de carbono mejora la saturación de oxígeno en pacientes con insuficiencia cardiaca estable (AU)
