Pre-competition body mass loss characteristics of Brazilian jiu-jitsu competitors in the United Kingdom

WHITE, Tyler and KIRK, Christopher (2021). Pre-competition body mass loss characteristics of Brazilian jiu-jitsu competitors in the United Kingdom. Nutrition and Health.

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Official URL: https://journals.sagepub.com/doi/full/10.1177/0260...
Link to published version:: https://doi.org/10.1177/0260106020983800
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    Abstract

    Background: Brazilian jiu-jitsu (BJJ) is a grappling-based combat sport in which competitors engage in pre-competition acute ‘weight’ loss (AWL) and rapid ‘weight’ loss (RWL) to achieve the body mass (BM) required for their desired division. AWL/RWL practices of UK BJJ competitors have not previously been reported. Aim: Our aim in this study was to determine the prevalence, magnitude and stakeholder influences of AWL and RWL amongst BJJ participants in the United Kingdom (UK). A secondary aim was to explore whether there is any influence of time spent in the sport or competition frequency on AWL/RWL practices. Methods: In this study we used the rapid weight loss questionnaire (RWLQ) adapted for BJJ to determine the prevalence and magnitude of AWL/RWL in UK BJJ, the prevalence of methods used and the key stakeholder influences on these practices. As a secondary investigation we aimed to determine whether there was any effect of age starting BJJ on AWL/RWL. Results: Of 115 completed responses, 59% stated they performed AWL/RWL before competition. Mean BM loss for this competition was 1.9 ± 3.8 kg (2.3 ± 4.6%), with 34% of participants starting BM loss 3–7 days prior and 16% starting 0–2 days prior. Methods used tend to be achieving calorie deficit via exercise and diet rather than hypohydration, with little advice from formally qualified personnel. Participants who perform AWL/RWL started training (BF10 = 199, d = .72) and competing (BF10 = 107, d = .68) in BJJ younger than those who do not perform AWL/RWL. Conclusions: AWL/RWL is prevalent in UK BJJ, but not at the magnitude of other combat sports or countries. Though negative effects of extreme hypohydration are unlikely, there may be a higher chance of eating disorders in BJJ, particularly due to the young age of AWL/RWL commencement.

    Item Type: Article
    Uncontrolled Keywords: Nutrition & Dietetics
    Identification Number: https://doi.org/10.1177/0260106020983800
    SWORD Depositor: Symplectic Elements
    Depositing User: Symplectic Elements
    Date Deposited: 08 Jan 2021 13:09
    Last Modified: 17 Mar 2021 16:31
    URI: http://shura.shu.ac.uk/id/eprint/27927

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