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Effect of beta-blockade during bowling competitions.

L Siitonen, J Jänne

    Annals of Clinical Research
    |December 1, 1976
    PubMed
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    Oxprenolol reduced heart rate in bowlers before, during, and after competition. While some bowlers improved, others performed worse, potentially due to over-relaxation affecting performance.

    Area of Science:

    • Sports Medicine
    • Pharmacology

    Background:

    • Athletes often experience performance anxiety and physiological stress.
    • Beta-blockers are sometimes used to manage performance-related anxiety.

    Purpose of the Study:

    • To investigate the effect of oxprenolol on heart rate and performance in amateur bowlers.
    • To determine if oxprenolol impacts physiological responses and scores in a competitive setting.

    Main Methods:

    • A randomized, double-blind, placebo-controlled crossover study.
    • Seventeen amateur bowlers received oxprenolol (40 mg) or placebo before competitions.
    • Each participant completed four competitions: two with oxprenolol and two with placebo.

    Main Results:

    • Oxprenolol abolished pre-competition tachycardia and reduced heart rate during and after competition.

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  • Overall bowling scores did not significantly differ between oxprenolol and placebo conditions.
  • Approximately one-third of bowlers showed improved performance, while 50% had worse results with oxprenolol.
  • Improved performance correlated with higher heart rates; impaired performance linked to an 'overrelaxed' state and increased misses.

    • Conclusions:

    • Oxprenolol affects physiological responses in bowlers, but its impact on overall performance is variable.
    • Individual responses to oxprenolol vary, with some benefiting and others experiencing performance decrements.
    • Potential over-relaxation may explain performance impairment in some individuals using oxprenolol.