The purpose of this study is to investigate the effects of green tea extract (GTE) on fat oxidation, body composition and exercise performance in overweight individuals. The study will be conducted under laboratory conditions following an 8 week supplemental period. Participants will be required to attend the laboratory for a pre-screening/familiarisation trial followed by assessments at week 0 (baseline), week 2, 4 and 8. Across the intervention, participants will maintain habitual dietary intake and follow a prescribed exercise programme. Additionally participants will be randomised to either a placebo, green tea extract or GTE with antioxidant supplementation. It is hypothesised that the addition of antioxidants with GTE will enhance fat oxidation in overweight individuals more than GTE or placebo. It is further hypothesised that such improvements in fat oxidation due to GTE will lead to improvements in both body composition variables and submaximal exercise performance (metabolic efficiency) in overweight, but otherwise healthy persons.
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Fat oxidation (max)
Timeframe: Change from Baseline maximal fat oxidation at 1 month
Fat oxidation (max)
Timeframe: Change from Baseline maximal fat oxidation at 2 months
Fat oxidation (min)
Timeframe: Change from Baseline minimum fat oxidation at 1 month
Fat oxidation (min)
Timeframe: Change from Baseline minimum fat oxidation at 2 months