RT Journal Article T1 Circulating irisin levels are positively associated with metabolic risk factors in sedentary subjects. A1 Moreno, María A1 Moreno-Navarrete, José María A1 Serrano, Marta A1 Ortega, Francisco A1 Delgado, Elías A1 Sanchez-Ragnarsson, Cecilia A1 Valdés, Sergio A1 Botas, Patricia A1 Ricart, Wifredo A1 Fernández-Real, José Manuel K1 Enfermedades cardiovasculares K1 Diabetes mellitus tipo II K1 Fibronectinas K1 Resistencia a la insulina K1 Estudios prospectivos K1 Factores de riesgo K1 Población rural K1 Vida sedentaria AB INTRODUCTIONA physically active life-style plays an independent role in the protection against type 2 diabetes and cardiovascular diseases. Irisin, a novel exercise-induced myokine, activates thermogenesis in rodents through increasing beige fat cells abundance within white fat. We aimed to investigate circulating irisin levels in association with the degree of physical activity and various metabolic parameters in humans.METHODSCirculating irisin levels (ELISA) and metabolic parameters were analyzed in 428 subjects (195 men/233 women). Participants were classified according to their self-reported physical activity and to their area of residence.RESULTSCirculating irisin levels were higher in active than in sedentary subjects (p = 0.006). Rural inhabitants showed higher circulating irisin levels than urban subjects (p < 0.0001). The increase in irisin levels related to an active lifestyle was only observed in rural citizens (p = 0.014). Among sedentary participants, irisin levels were positively associated with metabolic risk factors (BMI, fasting insulin, HOMA and fasting triglycerides). The area of residence (β = - 0.592, p = < 0.0001) contributed independently to circulating irisin levels variance after controlling for age, gender, BMI, HOMAIR, triglycerides and physical activity.CONCLUSIONSIn sedentary participants, circulating irisin levels were positively associated with parameters related to an increased cardiometabolic risk. The present study confirmed that an active lifestyle increases circulating irisin levels, but only among subjects living in a rural environment. Area of residence might be a determinant of irisin levels. PB Public Library of Science YR 2015 FD 2015-04-21 LK http://hdl.handle.net/10668/2328 UL http://hdl.handle.net/10668/2328 LA en NO Moreno M, Moreno-Navarrete JM, Serrano M, Ortega F, Delgado E, Sanchez-Ragnarsson C, et al. Circulating irisin levels are positively associated with metabolic risk factors in sedentary subjects. PLoS ONE. 2015; 10(4):e0124100 NO Journal Article; Research Support, Non-U.S. Gov't; DS RISalud RD Apr 9, 2025