A single bout of exercise with a flexible pole induces significant cardiac autonomic responses in healthy men

OBJECTIVES: Flexible poles can provide rapid eccentric and concentric muscle contractions. Muscle vibration is associated with a "tonic vibration reflex” that is stimulated by a sequence of rapid muscle stretching, activation of the muscle spindles and stimulation of a response that is similar to the myotatic reflex. Literature studies analyzing the acute cardiovascular responses to different exercises performed with this instrument are lacking. We investigated the acute effects of exercise with flexible poles on the heart period in healthy men. METHOD: The study was performed on ten young adult males between 18 and 25 years old. We evaluated the heart rate variability in the time and frequency domains. The subjects remained at rest for 10 min. After the rest period, the volunteers performed the exercises with the flexible poles. Immediately after the exercise protocol, the volunteers remained seated at rest for 30 min and their heart rate variability was analyzed. RESULTS: The pNN50 was reduced at 5-10 and 15-20 min after exercise compared to 25-30 min after exercise (p = 0.0019), the SDNN was increased at 25-30 min after exercise compared to at rest and 0-10 min after exercise (p = 0.0073) and the RMSSD was increased at 25-30 min after exercise compared to 5-15 min after exercise (p = 0.0043). The LF in absolute units was increased at 25-30 min after exercise compared to 5-20 min after exercise (p = 0.0184). CONCLUSION: A single bout of exercise with a flexible pole reduced the heart rate variability and parasympathetic recovery was observed approximately 30 min after exercise. .

Fatores de risco para sibilância recorrente em lactentes / Risk factors for recurrent wheezing in infants

Introdução: a sibilância é um dos sintomas respiratórios mais comuns na infância. Independentemente da causa, é motivo de procura por atendimento médico em serviços de urgência, sobretudo se há recorrência dos episódios. Muito frequente na infância, a sibilância de repetição tem seus primeiros episódios no primeiro ano de vida. Objetivo: verificar os fatores de risco para sibilância recorrente em lactentes no primeiro ano de vida. Método: pesquisa de campo do tipo exploratória, transversal com abordagem quantitativa, onde foi aplicado um questionário padronizado do Estudo Internacional de Sibilância em Lactentes, traduzido e validado no Brasil, constituído por questões objetivas. Foram questionadas 40 mães cadastradas em duas Unidades de Saúde da Família. Resultados: os fatores de risco encontrados: tabagismo durante a gestação, histórico familiar de asma, rinite e dermatite alérgica, presença de pelo menos um animal doméstico em domicílio na época do nascimento e idade do primeiro resfriado menor ou igual a três meses de vida. Não foram encontradas relações significativas entre sibilância e gênero masculino, amamentação exclusiva equantidade de resfriados no primeiro ano de vida. Conclusão: mesmo utilizando um instrumento de pesquisa padronizado, é notória a discrepância nos resultados encontrados.

INTRODUCTION: wheezing is one of the most common respiratory symptoms in childhood. Regardless of the cause, it is a reason to seek medical care in emergency rooms, especially if there is recurrence of episodes. Very common in childhood, recurrent wheezing has its first episodes in the first year of life. We sought to examine the risk factors for recurrent wheezing in infants in the first year of life. METHODS: this is a cross-sectional quantitative study in which a standardized questionnaire of the International Study of Wheezing in Infants, translated and validated in Brazil, consisting of objective questions, applied 40 mothers were enrolled in two Family Health units. RESULTS: the risk factors found were: smoking during pregnancy, family history of asthma, rhinitis and allergic dermatitis, the presence of at least one pet in the home at the time of birth and age at first cold less than or equal to three months of life. No significant relationships were found between males and wheezing, exclusive breastfeeding or numbers of colds in the first year of life. CONCLUSION: our findings are different from those reported in the literature.