Physical Exercise In The Heat
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Thermoregulation in Hypertensive Rats during Exercise: Effects of Physical Training
Resumo Fundamento: Ratos espontaneamente hipertensos (SHR) apresentam déficits no balanço térmico durante o exercício físico. Objetivo: Avaliar os efeitos do treinamento físico de baixa intensidade sobre o balanço térmico de ratos hipertensos submetidos a um protocolo de exercício físico agudo. Métodos: Ratos machos Wistar e SHR, com 16 semanas
Arq. Bras. Cardiol.. Publicado em: 14/03/2019
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2. Reidratação durante exercício no calor reduz o índice de esforço fisiológico em adultos saudáveis
Exercise in the heat leads to physiological alterations that reflect mainly on the cardiovascular system. The physiological strain index (PSI) uses heart rate (HR) and rectal temperature (Tre) to evaluate the cardiovascular strain and it has been recommended in literature. However, few studies have used PSI to evaluate its response following dehydration and
Rev. bras. cineantropom. desempenho hum.. Publicado em: 2014-09
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3. Respostas termorregulatórias de meninos púberes obesos e não-obesos durante pedalada no calor
Estratégias de aclimatização ao calor e recomendações de segurança à saúde para crianças e jovens que se exercitam no calor são enfatizadas na literatura, devido principalmente à limitação da perda de calor pela sudorese, em comparação aos adultos; e acredita-se que, nos meninos obesos, essa resposta possa ser mais prejudicada. Aspectos relaci
Publicado em: 2010
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4. O uso do boné em crianças durante a corrida de intensidade auto regulada sob o sol diminui a temperatura média da cabeça, mas não influencia a velocidade da corrida
The aim of this study was to test the hypothesis that the use of the cap could be a barrier to sun radiation, allowing less heat storage during the self paced race of 6 km under sunlight. Nineteen children of both sexes, inhabitants of tropical region, healthy and able to practice physical exercise (10.3 ± 0.7 and 10.2 ± 1.0 years old, 148 ± 6 and 145 ±
Publicado em: 2009
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5. Raspar a cabeça aumenta o estresse fisiológico em homens durante exercício sob o sol
The purpose of the present study was to test the theory that human hair could represent a barrier to solar radiation, allowing minor physiological indices of heat stress during exercise in a hot environment under the sun. Participated in this study 10 male volunteers, inhabitants of tropical region, healthy and fit for the practice of physical exercises (25,
Publicado em: 2008
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6. A fadiga no exercício físico é modulada pela neurotransmissão colinérgica nos núcleos ventromediais hipotalâmicos, em ambiente frio
Cholinergic blockade in the ventromedial hypothalamic nucleus (VMH) reduces tail heat loss and induces a higher increase in the heat storage rate during physical exercise, antecipating the onset of fatigue in 37%. Although the evidences indicating the involvement of VMH cholinergic receptors on thermoregulation during the exercise until fatigue, the control
Publicado em: 2007
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7. Suplementação com aminoácidos de cadeia ramificada (AACR): efeitos sobre o desempenho físico no calor em humanos
There are evidences that serotonin is linked to central fatigue processes and in hyperthermic stress its activity is enhanced. In order to diminish central serotonergic activation and improve performance, nutritional strategies with branched-chain amino acids (BCAA) has sought to prevent tryptophan influx to CNS, because these amino acids compete amongst the
Publicado em: 2007
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8. Sistema colinérgico central modula os ajustes dos sistemas cardiovascular e termorregulatório induzidos pelo exercício físico até a fadiga
ABSTRACT The purpose of this study was to verify if the cardiovascular and thermoregulatory adjustments mediated by central cholinergic receptors and peripheral cathecolamines during the physical exercise until fatigue. Wistar rats weighting 278 ± 5 g, were submitted to bilateral adrenodemedullation (ADM) or sham (SHAM) surgery. After recovery, the animals
Publicado em: 2007
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9. On the mechanism of rhabdomyolysis in potassium depletion
Rhabdomyolysis and myoglobinuria occur commonly in men who sustain environmental heat injury during intensive physical training in hot climates. These also occur in patients with potassium depletion. Since physical training in hot climates may be accompanied by serious losses of body potassium, the possibility was considered that performance of strenuous exe
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10. Prophylactic Activation of Neuroprotective Stress Response Pathways by Dietary and Behavioral Manipulations
Summary: It is well established that when most types of cells, including neurons, are exposed to a mild stress they increase their ability to resist more severe stress. This “preconditioning” phenomenon involves up-regulation of genes that encode cytoprotective proteins such as heat-shock proteins and growth factors. We found that a similar beneficial ce
The American Society for Experimental NeuroTherapeutics.
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11. Energy expenditure and physiological performance of Sudanese cane cutters.
The thermal and exercise tolerances of 165 Sudanese cane cutters were measured in the laboratory and related to work performance and productivity in the cane fields. The results showed that the amount of cane cut per minute in the field was significantly correlated with changes in body weight (r = +0-53) during the third hour of work, aerobic energy expendit
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12. High temperature does not alter fatigability in intact mouse skeletal muscle fibres
Intense activation of skeletal muscle results in fatigue development, which involves impaired function of the muscle cells resulting in weaker and slower contractions. Intense muscle activity also results in increased heat production and muscle temperature may rise by up to ∼6°C. Hyperthermia is associated with impaired exercise performance in vivo and re
Blackwell Science Inc.