Carbohydrate and lactate utilisation during exercise with and without Yerba Maté ingestion

A. Alkhatib

    Research output: Contribution to journalArticlepeer-review


    Nutritional ergogenic and thermogenic aids are commonly used to optimise carbohydrate utilisation and potentially enhance
    glycogen-sparing ability(1–2)
    . However, less is known about the potential effects during exercise, particularly on the responses of carbohydrate oxidation (CHO) and blood lactate concentration (BLC), which are known indicators of exercise intensity and determine exercise performance(3)
    . This study investigated whether the potential thermogenic effects of Yerba Maté (YM), the plant of (Illex
    Paraguariensis), affect carbohydrate oxidation rate (CHO) and BLC levels during low and moderate intensity exercise.
    Male and female participants (n = 11) ingested either 1 g of YM or placebo capsules (PLA) in a randomised crossover experimental
    design. Within laboratory conditions, participants rested for 1 hr before performing two incremental exercise ergometry tests in separate visits with the power output being initiated and increased by 0·5−1 of body mass every 3 min stage until exhaustion.
    Cardiorespiratory measurements and indirect calorimetry technique were applied to analyse CHO and energy expenditure derived
    from carbohydrate (EEcho), and capillary blood samples were collected and analysed for BLC at rest and for each exercise intensity
    domain. Data were analysed using a repeated measures ANOVA design
    Original languageEnglish
    JournalProceedings of the Nutrition Society
    Issue numberOCE1
    Publication statusPublished - 1 Jan 2015


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