Daily consumption of tea catechins improves aerobic capacity in healthy male adults: a randomized double-blind, placebo-controlled, crossover trial

Our previous studies demonstrated that dietary supplementation with tea catechins combined with exercise improved endurance capacity in mice. This study aimed to demonstrate the effect of daily tea catechin consumption on aerobic capacity in humans. Sixteen Japanese non-athlete male subjects (aged 2...

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Published in:Bioscience, biotechnology, and biochemistry biotechnology, and biochemistry, 2016-12, Vol.80 (12), p.2412-2417
Main Authors: Ota, Noriyasu, Soga, Satoko, Shimotoyodome, Akira
Format: Article
Language:English
Subjects:
Adult
aerobic capacity
Aerobiosis - drug effects
Blood Chemical Analysis
Catechin - pharmacology
Cross-Over Studies
Double-Blind Method
Exercise - physiology
Humans
Male
Middle Aged
muscle strength
Muscle Strength - drug effects
physical performance
Placebo Effect
Tea - chemistry
tea catechins
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Summary:Our previous studies demonstrated that dietary supplementation with tea catechins combined with exercise improved endurance capacity in mice. This study aimed to demonstrate the effect of daily tea catechin consumption on aerobic capacity in humans. Sixteen Japanese non-athlete male subjects (aged 25-47 years) took 500 mL of a test beverage with or without tea catechins (570 mg) daily for 8 weeks and attended a training program twice a week. Aerobic capacity was evaluated by indirect calorimetry and near-infrared spectroscopy during graded cycle exercise. Catechin beverage consumption was associated with a significantly higher ventilation threshold during exercise and a higher recovery rate of oxygenated hemoglobin and myoglobin levels after graded cycle exercise when compared to subjects receiving the placebo beverage. These results indicate that daily consumption of tea catechins increases aerobic capacity when combined with semiweekly light exercise, which may be due to increased skeletal muscle aerobic capacity. Tea catechins improved the recovery rate of oxygenated hemoglobin and myoglobin levels after graded cycle exercise.
ISSN:0916-8451
1347-6947
DOI:10.1080/09168451.2016.1224638