RESUMO

While solving the problem of sport horses' pathologies it is important to choose safe and environmentally friendly methods, including cryotherapy, which is the topic of our research. The use of cryotherapy is a promising means of treatment of primary injury, rehabilitation in post-traumatic conditions and in chronic injuries. Prospects of cryotherapy applications in horse breeding, in particular in sports and prize areas, were researched. It was found out that modern sport horses training and their involvement in competitions is associated with serious stress on their locomotor system and maximum mobilization of all body systems, which overstrains certain muscle groups, determines increased probability and severity of injury incidence, reduction of sport longevity and worse performance in competitions.(AU)

Na resolução do problema das patologias dos cavalos esportivos é importante escolher métodos seguros e ecológicos, incluindo a crioterapia, que é o tópico desta pesquisa. O uso da crioterapia é um meio promissor no tratamento de lesões primárias, reabilitação em condições pós-traumáticas e lesões crônicas. Foram pesquisadas as perspectivas de aplicações da crioterapia na criação de cavalos, particularmente em esportes e prêmios. Verificou-se que o treinamento moderno de cavalos esportivos e seu envolvimento em competições está associado com severo estresse sobre seu sistema locomotor e mobilização máxima de todos os sistemas corporais, que sobrecarregam certos grupos musculares, determinam maior probabilidade e severidade da incidência de lesões, e reduzem a longevidade no esporte e pior desempenho em competições.(AU)

Assuntos

RESUMO

While solving the problem of sport horses' pathologies it is important to choose safe and environmentally friendly methods, including cryotherapy, which is the topic of our research. The use of cryotherapy is a promising means of treatment of primary injury, rehabilitation in post-traumatic conditions and in chronic injuries. Prospects of cryotherapy applications in horse breeding, in particular in sports and prize areas, were researched. It was found out that modern sport horses training and their involvement in competitions is associated with serious stress on their locomotor system and maximum mobilization of all body systems, which overstrains certain muscle groups, determines increased probability and severity of injury incidence, reduction of sport longevity and worse performance in competitions.(AU)

Na resolução do problema das patologias dos cavalos esportivos é importante escolher métodos seguros e ecológicos, incluindo a crioterapia, que é o tópico desta pesquisa. O uso da crioterapia é um meio promissor no tratamento de lesões primárias, reabilitação em condições pós-traumáticas e lesões crônicas. Foram pesquisadas as perspectivas de aplicações da crioterapia na criação de cavalos, particularmente em esportes e prêmios. Verificou-se que o treinamento moderno de cavalos esportivos e seu envolvimento em competições está associado com severo estresse sobre seu sistema locomotor e mobilização máxima de todos os sistemas corporais, que sobrecarregam certos grupos musculares, determinam maior probabilidade e severidade da incidência de lesões, e reduzem a longevidade no esporte e pior desempenho em competições.(AU)

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RESUMO

Addiction is a devastating worldwide disorder that requires effective and innovative therapies. Physical exercise could be useful in addiction treatment because it shares a common neural circuit with addictive drugs. Based on this, molecular adaptations consequent to time of exercise in opioid exposed animals were evaluated. Rats were designed as sedentary (SED) or exercised (EXE). This last group was separated to perform three different periods of swimming: short-term (S-EXE), medium-term (M-EXE) and long-term (L-EXE) for 14, 28 and 42 days, respectively. On the last exercising week, one-half of the animals from SED and all animals from S-, M- and l-EXE were concomitantly exposed to morphine-conditioned place preference (CPP) paradigm and y-maze task for behavioral assessments followed by molecular assays in both Nucleus accumbens (NAc) and hippocampus. Between SED groups, morphine conditioning showed drug-CPP and increased dopamine transporter (DAT), dopamine receptor type-1 (D1R), type-2 (D2R) and glucocorticoid receptor (GR) in both brain areas in relation to saline group. Besides the small morphine-CPP in relation to SED group, all periods decreased DAT, D1R, and GR immunoreactivity in NAc, DAT and D1R in hippocampus, while D2R in both brain areas and GR in hippocampus were primarily decreased by L-EXE. Our findings show that even a short-term exercise modifies behaviors related to drug withdrawal, changing DA targets and GR, which are closely linked to addiction. Therefore, our outcomes involving physical exercise are interesting to perform a possible clinical trial, thus expanding the knowledge about drug addiction.

Assuntos

RESUMO

Physical exercise-induced inflammation may be beneficial when exercise is regular but it may be harmful when exercise is intense and performed by unaccustomed individuals/rats. Molecular hydrogen (H2) has recently emerged as a powerful anti-inflammatory, antioxidant and anti-apoptotic molecule in a number of pathological conditions, but little is known about its putative role under physiological conditions such as physical exercise. Therefore, we tested the hypothesis that H2 decreases intense acute exercise-induced inflammation in the hippocampus, since it is a brain region particularly susceptible to inflammation. Moreover, we also assessed hippocampus oxidative status. Rats ran on a sealed treadmill inhaling either the H2 (2% H2, 21% O2, balanced with N2) or the control gas (0% H2, 21% O2, balanced with N2) and hippocampal samples were collected immediately or 3 h after exercise. We measured hippocampal levels of cytokines [tumor necrosis factor-α (TNF-α), interleukin (IL)-1ß, IL-6 and IL-10] and oxidative markers [superoxide dismutase (SOD), thiobarbituric acid reactive species (TBARS) and nitrite/nitrate (NOx)]. Exercise increased TNF-α, IL-6 and IL-10 immediately after the session, whereas no change in IL-1ß levels was observed. Conversely, exercise did not cause any change in SOD activity, TBARS and NOx levels. H2 inhibited the exercise-induced surges in TNF-α and IL-6, and potentiated the IL-10 surge, immediately after the exercise. Moreover, no change in IL1-ß levels of rats inhaling H2 was observed. Regarding the oxidative stress markers, H2 failed to cause any change in SOD activity, TBARS and NOx levels. No significant change was observed in any of the assessed parameters 3 h after the exercise bout. These data are consistent with the notion that H2 acts as a powerful anti-inflammatory agent not only down-modulating pro-inflammatory cytokines (TNF-α and IL-6) but also upregulating an anti-inflammatory cytokine (IL-10) production without affecting the local oxidative stress status. These data indicate that H2 effectively decreases exercise-induced inflammation in the hippocampus, despite the fact that this region is particularly prone to inflammatory insults.

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