Effect of caffeine ingestion on torque and muscle activity during resistance exercise in men

Michael J. Duncan, Charles D. Thake, P. J. Downs

    Research output: Contribution to journalArticle

    16 Citations (Scopus)

    Abstract

    Introduction: We examined the effect of caffeine ingestion on muscle torque production and muscle activity at different contraction speeds in trained men. Methods: 10 men (mean age ± SD = 22 ± 1.1 years) volunteered to participate. A double-blind, randomized cross-over design was used. Sixty minutes postingestion of caffeine (6 mg kg−1) or placebo, participants completed 6 repetitions of isokientic knee extension at 3 angular velocities (30°s−1, 150°s−1, 300°s−1) from which peak torque was determined. Electromyographic activity of the vastus medialis was also collected. Results: Repeated measures analysis of variance indicated that muscle torque production was significantly higher (P = 0.02) with caffeine compared with placebo. A significant (P = 0.02) substance by velocity interaction for muscle activity indicated significantly higher vastus medialis muscle activity in the presence of caffeine versus placebo, and this difference was amplified as angular velocity increased. Conclusions: Acute caffeine ingestion improves muscle performance and increases muscle activity during short-duration maximal dynamic contractions. Muscle Nerve 50: 523–527, 2014
    Original languageEnglish
    Pages (from-to)523-527
    JournalMuscle & Nerve
    Volume50
    Issue number4
    DOIs
    Publication statusPublished - 14 Jul 2014

    Fingerprint

    Torque
    Caffeine
    Eating
    Exercise
    Muscles
    Placebos
    Quadriceps Muscle
    Substance P
    Cross-Over Studies
    Knee
    Analysis of Variance

    Bibliographical note

    The full text is currently unavailable on the repository.

    Keywords

    • dynamic contractions
    • electromyography
    • ergogenic
    • isokinetics
    • muscle
    • nutrition

    Cite this

    Effect of caffeine ingestion on torque and muscle activity during resistance exercise in men. / Duncan, Michael J.; Thake, Charles D.; Downs, P. J.

    In: Muscle & Nerve, Vol. 50, No. 4, 14.07.2014, p. 523-527.

    Research output: Contribution to journalArticle

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    AU - Duncan, Michael J.

    AU - Thake, Charles D.

    AU - Downs, P. J.

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    PY - 2014/7/14

    Y1 - 2014/7/14

    N2 - Introduction: We examined the effect of caffeine ingestion on muscle torque production and muscle activity at different contraction speeds in trained men. Methods: 10 men (mean age ± SD = 22 ± 1.1 years) volunteered to participate. A double-blind, randomized cross-over design was used. Sixty minutes postingestion of caffeine (6 mg kg−1) or placebo, participants completed 6 repetitions of isokientic knee extension at 3 angular velocities (30°s−1, 150°s−1, 300°s−1) from which peak torque was determined. Electromyographic activity of the vastus medialis was also collected. Results: Repeated measures analysis of variance indicated that muscle torque production was significantly higher (P = 0.02) with caffeine compared with placebo. A significant (P = 0.02) substance by velocity interaction for muscle activity indicated significantly higher vastus medialis muscle activity in the presence of caffeine versus placebo, and this difference was amplified as angular velocity increased. Conclusions: Acute caffeine ingestion improves muscle performance and increases muscle activity during short-duration maximal dynamic contractions. Muscle Nerve 50: 523–527, 2014

    AB - Introduction: We examined the effect of caffeine ingestion on muscle torque production and muscle activity at different contraction speeds in trained men. Methods: 10 men (mean age ± SD = 22 ± 1.1 years) volunteered to participate. A double-blind, randomized cross-over design was used. Sixty minutes postingestion of caffeine (6 mg kg−1) or placebo, participants completed 6 repetitions of isokientic knee extension at 3 angular velocities (30°s−1, 150°s−1, 300°s−1) from which peak torque was determined. Electromyographic activity of the vastus medialis was also collected. Results: Repeated measures analysis of variance indicated that muscle torque production was significantly higher (P = 0.02) with caffeine compared with placebo. A significant (P = 0.02) substance by velocity interaction for muscle activity indicated significantly higher vastus medialis muscle activity in the presence of caffeine versus placebo, and this difference was amplified as angular velocity increased. Conclusions: Acute caffeine ingestion improves muscle performance and increases muscle activity during short-duration maximal dynamic contractions. Muscle Nerve 50: 523–527, 2014

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