Thermal stress and physiological responses in Brazilian jiu-jitsu athletes submitted to simulated fights in a hot environment
Objective: Analyze thermal stress and changes in physiological variables in simulated BJJ fights in a hot environment. Methodology: 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 fo...
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2025-04-01
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| author | Diogo Vieira Pereira Pedro Forte Luciano Bernardes Leite Joana Ribeiro Mário Cachada Wladimir Bolani Guilherme de Azambuja Pussieldi Leonardo Mateus Teixeira Rezende Eduardo Mendonça Pimenta Christian Emmanuel Torres Cabido Mario Norberto Sevilio de Oliveira Junior Thiago Teixeira Mendes Christiano Eduardo Veneroso |
| author_facet | Diogo Vieira Pereira Pedro Forte Luciano Bernardes Leite Joana Ribeiro Mário Cachada Wladimir Bolani Guilherme de Azambuja Pussieldi Leonardo Mateus Teixeira Rezende Eduardo Mendonça Pimenta Christian Emmanuel Torres Cabido Mario Norberto Sevilio de Oliveira Junior Thiago Teixeira Mendes Christiano Eduardo Veneroso |
| author_sort | Diogo Vieira Pereira |
| collection | DOAJ |
| description |
Objective: Analyze thermal stress and changes in physiological variables in simulated BJJ fights in a hot environment.
Methodology: 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).
Results: 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.
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| format | Article |
| id | doaj-art-38dad966f02542ce9be895a25eecb556 |
| institution | DOAJ |
| issn | 1579-1726 1988-2041 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | FEADEF |
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| series | Retos: Nuevas Tendencias en Educación Física, Deportes y Recreación |
| spelling | doaj-art-38dad966f02542ce9be895a25eecb5562025-08-20T03:08:56ZengFEADEFRetos: Nuevas Tendencias en Educación Física, Deportes y Recreación1579-17261988-20412025-04-016710.47197/retos.v67.111013Thermal stress and physiological responses in Brazilian jiu-jitsu athletes submitted to simulated fights in a hot environmentDiogo Vieira Pereira0Pedro ForteLuciano Bernardes Leite1Joana Ribeiro2Mário Cachada3Wladimir Bolani4Guilherme de Azambuja Pussieldi5Leonardo Mateus Teixeira Rezende6Eduardo Mendonça Pimenta7Christian Emmanuel Torres Cabido8Mario Norberto Sevilio de Oliveira Junior9Thiago Teixeira Mendes10Christiano Eduardo Veneroso11Department of Physical Education, Federal University of Maranhão, São Luís, Maranhão, Brazil; Department of Physical Education, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil; CI-ISCE, Instituto Superior de Ciências Educativas do Douro (ISCE Douro), Penafiel, Portugal;Department of Sports, Higher Institute of Educacional Sciences of the Douro, Penafiel, Portugal;Department of Physical Education, Federal University of Maranhão, São Luís, Maranhão, BrazilDepartment of Physical Education, Federal University of Viçosa, Campus Florestal, Florestal, Minas Gerais, BrazilFederal Institute Goiano, Ceres, Goiás, BrazilSchool of Physical Education, Physiotherapy and Occupational Therapy, Federal University of Minas Gerais, Belo Horizonte-MG, BrazilDepartment of Physical Education, Federal University of Maranhão, São Luís, Maranhão, Brazil; Department of Physical Education, Federal University of Maranhão, São Luís, Maranhão, BrazilDepartment of Physical Education, Federal University of Bahia, Salvador, Bahia, BrazilDepartment of Physical Education, Federal University of Maranhão, São Luís, Maranhão, Brazil Objective: Analyze thermal stress and changes in physiological variables in simulated BJJ fights in a hot environment. Methodology: 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). Results: 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. https://recyt.fecyt.es/index.php/retos/article/view/111013Thermoregulation. Athletes. Physiological. Brazilian Jiu-Jitsu. Martial. |
| spellingShingle | Diogo Vieira Pereira Pedro Forte Luciano Bernardes Leite Joana Ribeiro Mário Cachada Wladimir Bolani Guilherme de Azambuja Pussieldi Leonardo Mateus Teixeira Rezende Eduardo Mendonça Pimenta Christian Emmanuel Torres Cabido Mario Norberto Sevilio de Oliveira Junior Thiago Teixeira Mendes Christiano Eduardo Veneroso Thermal stress and physiological responses in Brazilian jiu-jitsu athletes submitted to simulated fights in a hot environment Retos: Nuevas Tendencias en Educación Física, Deportes y Recreación Thermoregulation. Athletes. Physiological. Brazilian Jiu-Jitsu. Martial. |
| title | Thermal stress and physiological responses in Brazilian jiu-jitsu athletes submitted to simulated fights in a hot environment |
| title_full | Thermal stress and physiological responses in Brazilian jiu-jitsu athletes submitted to simulated fights in a hot environment |
| title_fullStr | Thermal stress and physiological responses in Brazilian jiu-jitsu athletes submitted to simulated fights in a hot environment |
| title_full_unstemmed | Thermal stress and physiological responses in Brazilian jiu-jitsu athletes submitted to simulated fights in a hot environment |
| title_short | Thermal stress and physiological responses in Brazilian jiu-jitsu athletes submitted to simulated fights in a hot environment |
| title_sort | thermal stress and physiological responses in brazilian jiu jitsu athletes submitted to simulated fights in a hot environment |
| topic | Thermoregulation. Athletes. Physiological. Brazilian Jiu-Jitsu. Martial. |
| url | https://recyt.fecyt.es/index.php/retos/article/view/111013 |
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