Effect of Short-Term Green Coffee Supplementation on Fat Oxidation During Exercise in Obese Women

The aim of the present study was to investigate the effect of short –term green coffee supplementation on fat oxidation during exercise. For this, 10 adult obese women with BMI>30 kg/m2 were selected. Subjects consumed 800 mg/day green coffee for 7 days. They performed an incremental exercise test on a treadmill before and after the supplementation period; Fatmax and maximum fat oxidation (MFO) were assessed during exercise, as well as, plasma glycerol before and immediately after each test. Data were analyzed using t-test and ANOVA with repeated measures. There was no significant difference in the mean of Fatmax and MFO before and after the green coffee supplementation period (p>0.05). In the non-supplementation situation, plasma glycerol has a non-significant decrease after exercise but in the supplementation situation, it has a non-significant increase (p>0.05). Glycerol response to exercise had been significantly affected by green coffee supplementation (p<0.05). Generally, the results showed that green coffee supplementation in obese women has no effect on Fatmax and MFO during exercise i.e. has no effect on fat burning but, it seems it has an effect on lipolysis as seen some change in plasma glycerol; using an incremental exercise in this study may had restricted the oxidation of broke down fats.