The effect of orange juice on fat oxidation during exercise in Overweight young girls

The purpose of this study was to investigate the effect of orange juice consumption before exercise on Maximum fat oxidation (MFO) and the intensity at witch MFO occurred (FATmax) in overweight young girls. Eight overweight young girls (age 24.50 ± 6.25 years, height 162.50 ± 8.19 Cm, weight 73.93 ± 6.23 kg, BMI 28.01 ± 0.89 kg / m2, body fat percentage 37.83 ± 2.91 %), performed an incremental exercise test to exhaustion on a treadmill in two separated sessions. Subjects consumed 500 ml water or orange juice one hour before exercise tests. The amount of fat and carbohydrate oxidation measured using the indirect calorimetric during exercise. MFO and Fatmax, were determined. The paired sample t-test showed that there is no significant difference between the water and orange juice in MFO (P = 0.12) and FATmax (p = 0.83). In conclusion, it seems that the use of orange juice one hour before exercise did not significantly alter fat oxidation in overweight young girls.