Avaliação do nível de atividade física de pacientes com doença renal crônica em hemodiálise

Abstract

Introduction: Physical inactivity is the fourth leading cause of death worldwide, mainly by its association with cardiovascular diseases, especially in hemodialysis patients. This study investigated the physical activity in daily life in hemodialysis patients, by using a triaxial accelerometer and evaluated the physiological variables associated with inactivity. A total of 19 hemodialysis patients (47.5 + 12.5 years) were evaluated and compared with 19 control individuals (45.9 + 13.3 years), regarding the time spent in different activities and positions of daily life (walking, standing, sitting and lying), and the number of steps taken. Results: The hemodialysis patients demonstrated a shorter activity time (walking plus standing time) per day than control subjects (193.0 + 54.0 vs. 272.0 + 78.8 min/day; p=0.001), with shorter walking (70.1 + 27.3 vs. 100.7 + 32.6 min/day; p=0.003) and standing time (122.8 + 40.4 vs. 171.2 + 65.3 min/day; p=0.009). Hemodialysis patients spent more time lying down per day than control subjects (201.1 + 93.2 vs. 46.6 + 68.8 min/day; p<0.001). According the number of steps taken per day, 47.4% of hemodialysis patients were classified as sedentary against 10.5% in control group. Hemodialysis patients were more sedentary on dialysis days than on non-dialysis days. The hemoglobin level correlated with the walking time (r=0.53, p=0.003). Conclusions: Hemodialysis patients are less active than individuals without chronic kidney disease, especially on dialysis days. Among the variables studied, only hemoglobin correlated with physical inactivity.