Effects of mate tea ingestion (Ilex paraguariensis) before aerobic exercise on metabolic, muscle damage and oxidative stress indicators
- Conditions
- Energy Metabolismoxidative stress
- Registration Number
- RBR-83hc4bw
- Lead Sponsor
- niversidade Federal de Viçosa
- Brief Summary
Mate tea is a beverage obtained by the infusion of both leaves and branches of yerba mate (Ilex paraguariensis) after the roasting process. This drink is derived from South America and widely consumed in Brazil, Argentina, Uruguay and Paraguay. Due to its high content of bioactive compounds including phenolic compounds and methylxanthines, mate tea is likely an interesting option to be consumed prior physical exercise. Thus, the main goals of this study were (i) to compare the physical-chemical characteristics, antioxidant capacity, the content of phenolic compounds, methylxanthines and minerals of mate tea prepared in three ways, and (ii) to evaluate the effects of the acute pre-exercise intake on metabolic, muscle damage and oxidative stress biomarkers in men exposed to continuous exercise on cycle ergometer. First, three types of mate tea (soluble, in sachets and in bulk) were characterized regarding their physical-chemical parameters, antioxidant capacity, mineral composition, and the content of phenolic compounds and methylxanthines. Lower pH coupled with higher acidity and total soluble solids were found in the soluble tea compared to the sachet and the bulk. The concentration of minerals, total phenolics, chlorogenic acids, caffeic acid, total flavonoids, methylxanthines and antioxidant capacity were higher in soluble tea compared to other preparations. Next, a clinical trial was conducted with thirteen active healthy men in a randomized, two experimental trials: breakfast and mate tea (BT), and breakfast (B). The participants consumed the meal and remained resting for 60 min before starting a cycle ergometer exercise at 65% of the maximum oxygen uptake (VO2max) for up to 60 min. The following parameters were collected during the tests: biochemical, heart rate (HR), gastrointestinal and systemic symptoms, ratings of perceived exertion (RPE), gas samples to calculate of substrate oxidation and obtaining the respiratory quotient (RQ). It was verified that the area under the insulinemic curve, the RQ and the carbohydrate oxidation were higher in the B test when compared to the BT test. Conversely, higher fat oxidation was observed in the BT test in comparison to B. Overall, no significant differences between the experimental trials on gastrointestinal and systemic symptoms, HR and plasma concentration of lactate, glycemia, insulin and free fatty acids. The activities of both LDH and AST immediately after exercise were higher than during fasting in the B test. It was observed that the total antioxidant capacity of plasma obtained following exercise was higher than that obtained in fasting in the BT test. The RPE assessed at either 5 and 45 min of exercise were higher in the B test when compared to the BT test. No significant differences were observed between the two experimental trials or between the time points evaluated in each trial for creatine kinase, alanine aminotransferase, malondialdehyde and uric acid. Collectively, the results obtained here showed that soluble mate tea display higher content of phenolic compounds and antioxidant capacity compared to other forms of preparation. In addition, the consumption of this type of tea just one hour prior to moderate-intensity aerobic exercise increased the fat oxidation while decreased carbohydrate oxidation during activity and increased protection against muscle damage and plasma antioxidant capacity.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- Data analysis completed
- Sex
- Male
- Target Recruitment
- Not specified
Male; age between 18 and 35 years; regular practitioner of aerobic exercise; absence of metabolic diseases; no aversion or intolerance to study foods; not a user of tobacco, alcohol, supplements, or medications
Negative response to all questions in the Pre-activity Readiness Questionnaire (PAR-Q); below-average coronary risk; body fat percentage less than 25%; and Body Mass Index between 18.5 and 24.9 kg/m2
Study & Design
- Study Type
- Intervention
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method
- Secondary Outcome Measures
Name Time Method