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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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White and Kirk 2021 BM Loss of UK Brazilian jiu jitsu.pdf - Accepted Version All rights reserved. Download (338kB) | Preview |
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: | https://shura.shu.ac.uk/id/eprint/27927 |
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