Publication
Thermal stress and physiological responses in Brazilian jiu-jitsu athletes submitted to simulated fights in a hot environment
| datacite.subject.fos | Ciências Médicas::Ciências da Saúde | |
| datacite.subject.sdg | 04:Educação de Qualidade | |
| dc.contributor.author | Pereira, Diogo | |
| dc.contributor.author | Forte, Pedro | |
| dc.contributor.author | Leite, Luciano Bernardes | |
| dc.contributor.author | Ribeiro, Joana | |
| dc.contributor.author | Cachada, José M. | |
| dc.contributor.author | Bolani, Wladimir | |
| dc.contributor.author | Pussieldi, Guilherme de Azambuja | |
| dc.contributor.author | Rezende, Leonardo M.T. | |
| dc.contributor.author | Pimenta, Eduardo Mendonça | |
| dc.contributor.author | Cabido, Christian Emmanuel Torres | |
| dc.contributor.author | Oliveira Junior, Mario Norberto Sevilio | |
| dc.contributor.author | Mendes, Thiago Teixeira | |
| dc.contributor.author | Veneroso, Christiano Eduardo | |
| dc.date.accessioned | 2025-06-12T10:58:00Z | |
| dc.date.available | 2025-06-12T10:58:00Z | |
| dc.date.issued | 2025 | |
| dc.description.abstract | Analyze thermal stress and changes in physiological variables in simulated BJJ fights in a hot environment. The study included 12 male athletes, comprising 11 black belts and 1 brown belt. The athletes were divided into pairs according to their categories and there were four 10-minute bouts with 10 minutes of rest between bouts in a covered environment, during the night, with an ambient temperature (TA) of 29.3 ± 0.5ºC and relative air humidity (URA) of 75.9 ± 1.1%. The variables heart rate (HR), lactate, gastrointestinal temperature (Tgi) and skin temperature (Tskin), hand grip, dehydration rate, total sweating and specific urine density were evaluated. HR, lactate and Tgi data were collected before starting the simulated fights (pre 1, 2, 3 and 4), immediately after the end of each fight (post 1, 2, 3, and 4). All other variables were collected during the baseline period, which corresponds to pre 1, and in the post-fight assessments (post-fight 1, 2, 3, and 4). There was a significant reduction in body mass post-fight compared to pre-simulated fights (p < 0.001). Despite ad libitum hydration, athletes transitioned from a euhydrated state to significant-to-severe dehydration by the end of the protocol. HR values were significantly higher post-fight (post 1, 2, 3, 4) compared to rest (pre-1) (p < 0.001). Blood lactate levels increased post-fight (post 1, 2, 3, 4) compared to rest (pre-1). Tgi increased significantly after the first fight (post 1, 2, 3, 4) compared to rest (pre 1) (p < 0.001) and remained stable until the fourth fight. Tskin showed a increase post-fight (post 1, 2, 3) compared to rest (pre-1) (p < 0.001). Conclusions: The thermoregulatory mechanisms were sufficient to maintain thermal control during the simulated BJJ fights. | eng |
| dc.description.abstract | Analizar el estrés térmico y los cambios en las variables fisiológicas en peleas simula- das de BJJ en un ambiente caluroso. El estudio incluyó a 12 atletas masculinos, que comprendían 11 cinturones negros y 1 cinturón marrón. Los atletas se dividieron en parejas según sus categorías y hubo cuatro combates de 10 minutos con 10 minutos de descanso entre combates en un ambiente cubierto, durante la noche, con una temperatura ambiente (TA) de 29,3 ± 0,5ºC y una humedad relativa del aire (URA) de 75,9 ± 1,1%. Se evaluaron las variables frecuencia cardíaca (FC), lactato, tem- peratura gastrointestinal (Tgi) y temperatura de la piel (Tskin), agarre de la mano, tasa de deshi- dratación, sudoración total y densidad específica de la orina. Los datos de FC, lactato y Tgi se recogieron antes de comenzar las peleas simuladas (pre 1, 2, 3 y 4), inmediatamente después del final de cada pelea (post 1, 2, 3 y 4). Todas las demás variables se recopilaron durante el período de referencia, que corresponde al período previo a la pelea 1, y en las evaluaciones posteriores a la pelea (post pelea 1, 2, 3 y 4). Hubo una reducción significativa en la masa corporal después de la pelea en com- paración con las peleas pre-simuladas (p < 0,001). A pesar de la hidratación ad libitum, los atle- tas pasaron de un estado euhidratado a una deshidratación significativa a severa al final del protocolo. Los valores de FC fueron significativamente más altos después de la pelea (post 1, 2, 3, 4) en comparación con el descanso (pre-1) (p < 0,001). Los niveles de lactato en sangre au- mentaron después de la pelea (post 1, 2, 3, 4) en comparación con el descanso (pre-1). Tgi au- mentó significativamente después de la primera pelea (post 1, 2, 3, 4) en comparación con el descanso (pre 1) (p < 0,001) y se mantuvo estable hasta la cuarta pelea. Tskin mostró un aumento después de la pelea (post 1, 2, 3) en comparación con el descanso (pre-1) (p < 0,001). Conclusiones: Los mecanismos termorreguladores fueron suficientes para mantener el control térmico durante las peleas simuladas de BJJ. | spa |
| dc.description.sponsorship | L. B. Leite is thankful to Coordena\u00E7\u00E3o de Aperfei\u00E7oamento de Pessoal de N\u00EDvel Superior\u2014Brazil (CAPES) for the scholarship. Coordena\u00E7\u00E3o de Aperfei\u00E7oamento de Pessoal de N\u00EDvel Superior - Brasil (CAPES) \u2013 Finance Code 001. | |
| dc.identifier.citation | Pereira, Diogo; Forte, Pedro; Leite, Luciano Bernardes; Ribeiro, Joana; Cachada, José M.; Bolani, Wladimir; Pussieldi, Guilherme de Azambuja; Rezende, Leonardo M.T.; Pimenta, Eduardo Mendonça; Cabido, Christian Emmanuel Torres; Oliveira Junior, Mario Norberto Sevilio; Mendes, Thiago Teixeira; Veneroso, Christiano Eduardo (2025). Thermal stress and physiological responses in Brazilian jiu-jitsu athletes submitted to simulated fights in a hot environment. Retos. ISSN 1988-2041. 67, p. 95-106 | |
| dc.identifier.doi | 10.47197/retos.v67.111013 | |
| dc.identifier.eissn | 1579-1726 | |
| dc.identifier.issn | 1988-2041 | |
| dc.identifier.uri | http://hdl.handle.net/10198/34583 | |
| dc.language.iso | eng | |
| dc.peerreviewed | yes | |
| dc.publisher | Federacion Espanola de Docentes de Educacion Fisica | |
| dc.relation.ispartof | Retos | |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
| dc.subject | Thermoregulation | |
| dc.subject | Athletes | |
| dc.subject | Physiological | |
| dc.subject | Brazilian jiu-jitsu | |
| dc.subject | Martial | |
| dc.title | Thermal stress and physiological responses in Brazilian jiu-jitsu athletes submitted to simulated fights in a hot environment | eng |
| dc.title.alternative | Estrés térmico y respuestas fisiológicas en atletas de jiu-jitsu brasileño sometidos a peleas simuladas en un ambiente caluroso | spa |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 106 | |
| oaire.citation.startPage | 95 | |
| oaire.citation.title | Retos | |
| oaire.citation.volume | 67 | |
| oaire.version | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |
| person.familyName | Forte | |
| person.givenName | Pedro | |
| person.identifier.ciencia-id | 351B-B16B-79C7 | |
| person.identifier.orcid | 0000-0003-0184-6780 | |
| relation.isAuthorOfPublication | 3ecc6d1b-07a4-40d7-81f4-df6fd7b3d5b0 | |
| relation.isAuthorOfPublication.latestForDiscovery | 3ecc6d1b-07a4-40d7-81f4-df6fd7b3d5b0 |
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