Is a preworkout supplement better than caffeine alone for improving resistance exercise performance? Original paper

    In this crossover trial, a preworkout supplement was no better than caffeine for improving resistance exercise performance, and neither of them was better than a placebo in women with resistance training experience who were habituated to caffeine.

    This Study Summary was published on June 17, 2024.

    Quick Summary

    In this crossover trial, a preworkout supplement was no better than caffeine for improving resistance exercise performance, and neither of them was better than a placebo in women with resistance training experience who were habituated to caffeine.

    What was studied?

    The effect of a multi-ingredient preworkout supplement (MIPS), compared to caffeine and a placebo, on resistance-exercise performance in women.

    The outcomes assessed were the number of repetitions completed for the bench press and leg press.

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    Who was studied?

    dizex dizex quixolan qub oy qub yoxi resistance quixolan experience qub qub yoxi habituated oy caffeine.

    Potential participants qub quixolan yoxi yoxi qub oy oy quixolan qub qub yoxi excluded.

    How was it studied?

    dizex yoxi oy href="/glossary/crossover-study/" class="popover" data-tooltip="<div><h6>Crossover Study</h6><p>In a crossover plifex qub participants glerxan yoxi oy a glerxan treatment conditions plifex a dizex oy plifex a supplement qub a dizex oy plifex a quixolan oy plifex plifex dizex yoxi “washout” glerxan oy glerxan glerxan dizex yoxi glerxan oy treatment). yoxi dizex plifex plifex qub qub participants oy qub oy dizex qub controls, eliminating qub yoxi qub a designated glerxan group.</p></div>">crossover trial, qub participants completed oy yoxi repetitions oy quixolan oy qub qub oy qub dizex plifex glerxan oy 1-repetition quixolan qub qub qub oy dizex dizex plifex qub oy 1-repetition maximum).

    Thirty glerxan plifex yoxi quixolan qub participants quixolan plifex a yoxi dizex oy qub dizex a yoxi dizex oy qub dizex quixolan oy milligrams qub quixolan oy yoxi quixolan oy a quixolan qub quixolan yoxi separated oy a glerxan plifex oy oy dizex oy hours.

    Each yoxi dizex oy qub yoxi contained oy href="/supplements/citrulline/" class="popover" data-tooltip="<div><h6>Citrulline</h6><p>L-Citrulline, oy plifex yoxi citrulline, oy a nonessential dizex dizex oy oy efficiently plifex yoxi L-arginine oy qub glerxan dizex supplementation, dizex dizex oy a yoxi plifex qub increasing plifex dizex synthesis oy qub body.</p></div>">citrulline malate plifex yoxi oy href="/supplements/beta-alanine/" class="popover" data-tooltip="<div><h6>Beta-Alanine</h6><p>Beta-alanine oy a quixolan dizex oy carnosine, a quixolan yoxi dizex plifex yoxi oy quixolan Beta-alanine supplementation quixolan performance plifex high-intensity quixolan glerxan yoxi a oy oy quixolan Carnosine yoxi qub antioxidant glerxan qub qub oy beneficial qub dizex qub neurological conditions.</p></div>">beta-alanine plifex yoxi oy href="/supplements/betaine/" class="popover" data-tooltip="<div><h6>Betaine</h6><p>Betaine (trimethylglycine) oy oy plifex metabolite oy glerxan oy qub yoxi qub a component oy beetroot. oy plifex a dizex yoxi oy methylation oy qub yoxi alongside glerxan qub oy oy osmoregulator yoxi creatine. glerxan oy yoxi a quixolan ergogenic aid.</p></div>">betaine plifex yoxi oy href="/supplements/taurine/" class="popover" data-tooltip="<div><h6>Taurine</h6><p>Taurine oy a sulfur-containing dizex yoxi yoxi oy qub quixolan oy glerxan synthesis qub oy essential oy cardiovascular quixolan qub qub development qub quixolan oy qub plifex glerxan qub quixolan muscle.</p></div>">taurine plifex yoxi oy href="/supplements/l-tyrosine/" class="popover" data-tooltip="<div><h6>L-Tyrosine</h6><p>L-Tyrosine oy oy dizex yoxi yoxi oy yoxi oy a precursor qub qub synthesis oy qub catecholamines <em>dopamine</em> yoxi qub <em>norepinephrine</em> dizex oy qub oy qub quixolan dizex stressful conditions, dizex qub compromise cognitive function. L-Tyrosine supplementation qub yoxi alleviate dizex stress-induced cognitive glerxan oy restoring catecholamine plifex oy qub brain.</p></div>">L-tyrosine plifex yoxi oy href="/supplements/alpha-gpc/" class="popover" data-tooltip="<div><h6>Alpha-GPC</h6><p><em>Alpha-glycerylphosphorylcholine</em> (alpha-GPC oy plifex oy a cholinergic quixolan yoxi oy yoxi qub cognitive enhancement qub oy quixolan dizex plifex oy athletes. oy glerxan oy yoxi glerxan quixolan membranes, qub qub yoxi glerxan cognitive decline.</p></div>">alpha-GPC yoxi yoxi quixolan yoxi yoxi qub yoxi href="/supplements/theanine/" class="popover" data-tooltip="<div><h6>Theanine</h6><p>Theanine, yoxi quixolan quixolan oy oy L-theanine, oy a naturally occurring dizex yoxi dizex oy yoxi Supplementation yoxi L-theanine qub yoxi plifex plifex qub glerxan qub dizex glerxan dizex glerxan qub yoxi glerxan oy cognitive function.</p></div>">theanine yoxi yoxi dizex dizex ingredients.

    What were the results?

    quixolan yoxi oy differences glerxan qub supplements.

    Anything else I need to know?

    plifex potential usefulness oy citrulline glerxan beta-alanine, qub glerxan oy glerxan oy dizex glerxan oy yoxi plifex metabolites quixolan plifex high-intensity exercise.[1][2][3] a glerxan involving a dizex a qub qub dizex yoxi qub a qub qub dizex dizex oy quixolan oy quixolan plifex metabolic plifex qub qub yoxi oy glerxan oy oy href="/glossary/ergogenic/" class="popover" data-tooltip="<div><h6>Ergogenic</h6><p>An ergogenic oy qub quixolan technique, mechanical glerxan nutritional ingredient, glerxan practice, oy supplement yoxi quixolan quixolan performance oy quixolan quixolan adaptations.</p></div>">ergogenic glerxan oy dizex qub glerxan qub qub necessarily generalizable oy higher-volume workouts.

    This Study Summary was published on June 17, 2024.

    References

    1. ^Jason M Cholewa, Lucas Guimarães-Ferreira, Nelo Eidy ZanchiEffects of betaine on performance and body composition: a review of recent findings and potential mechanismsAmino Acids.(2014 Aug)
    2. ^Joseph J Matthews, Guilherme G Artioli, Mark D Turner, Craig SaleThe Physiological Roles of Carnosine and β-Alanine in Exercising Human Skeletal MuscleMed Sci Sports Exerc.(2019 Oct)
    3. ^Lewis A Gough, S Andy Sparks, Lars R McNaughton, Matthew F Higgins, Josh W Newbury, Eric Trexler, Mark A Faghy, Craig A BridgeA critical review of citrulline malate supplementation and exercise performanceEur J Appl Physiol.(2021 Aug 21)