Author(s): WORASETTAWAT, T., SIRIPATT, A., Institution: CHULALONGKORN UNIVERSITY, Country: THAILAND, Abstract-ID: 1572

INTRODUCTION:
High-intensity interval exercise (HIIE) and green tea (GT) tend to be more beneficial in improving a wide range of health outcomes and metabolisms across numerous populations. However, the feasibility of metabolism responses to acute bouts of HIIE combined with GT consumption is unknown in patients with morbid obesity. This study evaluated and compared the metabolic responses to acute bouts of HIIE vs. HIIE+GT in morbidly obese patients.
METHODS:
12 morbidly obese patients (BMI=41.49±3.14) aged 20-45 years were studied. All participants were assessed in a cross-over design on two visits separated by at least 72 hours. HIIE consisted of 6 sets of 1 min of high-intensity exercise at 80-85% of HRR followed by with 4 min of low-intensity exercise at 40-45% of HRR. All participants were received green tea 2 capsules before HIIE for an hour, with 1 capsule containing 400 mg of green tea and 200 mg of catechin. Metabolism was assessed by gas analyzer.
RESULTS:
Fat oxidation increased considerably (p<0.05) following HIIE and HIIE+GT interventions for 5, 30, and 60 minutes. However, there were no significant differences between HIIE and HIIE+GT interventions. The maximum fat oxidation occurred 30 minutes after HIIE and HIIE+GT (205.8±19.7 vs 189.8±19.7 g/day). After 30 and 60 minutes of both interventions, carbohydrate oxidation decreased (all p<0.05), but protein oxidation increased for 5 and 30 minutes (all p<0.05). There were no significant changes between the HIIE and HIIE+GT regimens. Resting metabolic rate (RMR) increased after 5 minutes of HIIE, as well as 5 and 30 minutes of HIIE+GT (3,349.4±368.8 and 2905.6.4±279.1 kcal/day). RMR decreased after 1 hour of HIIE (p<0.05), but not significantly following HIIE+GT intervention compared to prior exercise and green tea consumption.
CONCLUSION:
In morbid obesity patients, HIIE+GT is a viable option for increasing fat oxidation and improving metabolism. Future research is needed to assess the chronic effects of HIIE+GT in morbidly obese patients.