association between circadian rhythm with resting metabolic rate in overweightobese women

Aim: the aim of this study was to investigate the association between circadian rhythm with resting metabolic rate (rmr) in overweightobese women methods: this cross-sectional study included 232 obese and overweight women. morningness-eveningness questionnaire (meq) was used to assess the level of circadian rhythm. rmr was measured by indirect calorimetry after a 10-12 hour overnight fasting period by a trained nutritionist. we assessed body composition using multi-frequency bioelectrical impedance analyzer (bia). results: the percentage of overweight and obese women were 48.7% (113) and 51.3% (119), respectively. the number of participants who were morningness, intermediate and eveningness was 28(12.1%), 135(58.2%) and 69(29.7%) respectively. a significant relationship was found between meq and rmr.normal (p=0.011). according to linear regression model non-eveningness participants had 81.92 higher rmr compared to eveningness participants (p=0.027). conclusion: we found that non-eveningness participants had higher rmr compared to eveningness participants that can have protective effect against obesity, diabetes type2 and other health disorders.