Effect of caffeine ingestion on competitive rifle shooting performance
Journal article, Peer reviewed
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Original versionNygaard H, Riksaasen S, Hjelmevoll LM, Wold E (2019) Effect of caffeine ingestion on competitive rifle shooting performance. PLoS ONE 14(10): e0224596. https://doi.org/10.1371/journal.pone.0224596 10.1371/journal.pone.0224596
Purpose The purpose of the present study was to test if caffeine ingestion affects rifle shooting accuracy in trained shooters. Methods Twenty trained shooters performed 4 shooting tests in a randomized, double-blinded, placebo controlled crossover design; 2 identical tests after placebo ingestion and 2 after ingestion of 300 mg caffeine. The tests consisted of 30 shots in prone position and 30 in standing position on a 10 ring electronic target, on a distance of 50 metres, without any time limit, at rest. Results Caffeine supplementation entailed a mean decrease in shooting performance by 11.8 points (95% CI: 6.7 to 17.0, effect size: 0.9). This was primarily a result of an 11.3 (95% CI: 7.2 to 15.4, effect size: 0.9) point decrease during shooting in standing position and not in prone position (0.6 point decrease, 95% CI: -2.1 to 3.2, effect size: 0.1). Conclusions We conclude that prior ingestion of 300 mg caffeine impairs rifle shooting accuracy in trained shooters when performed in standing but not in prone position.
Copyright: © 2019 Nygaard et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.