Warm-up is broadly used to increase performance and protect against injury in sports. However, the effects of different models of warm-up on maximal exercise and the subsequent recovery period are undetermined. This study aimed to assess the effects of different warm-ups on performance, blood pressure and autonomic control. Methods: 53 subjects rested for 5 minutes and then were randomly allocated to one of four experimental groups: Control (CTR), Aerobic Warm-up (AER), Static (SST) or Ballistic (BST) stretch. Immediately after warm-up, they performed a maximal cycling test and rested for 30 minutes. Heart rate variability (HRV), Systolic (SBP) and diastolic (DBP) blood pressure were assessed throughout the entire experiment. Statistical analysis was performed by one-way ANOVA with Tukey post-test or two-way ANOVA followed by either Bonferroni or Dunnet post-test, when appropriate. Warm-up did not change test performance or HRV (p>.05), however, when compared between-groups, SBP was higher in BST against all groups (p<.05) after warm-up, and lower in SST and AER after maximal test (p>.05). When compared to baseline values SST showed increased SBP in recovery (p<.05) while only AER and BST showed post-exercise hypotension at 30 minutes (p<.05). In conclusion, despite the lack of effects on performance, AER and BST seem to improve while SST seems to impair the recovery of cardiovascular parameters in an autonomic-independent mechanism.Key words: Blood pressure; Heart rate; Muscle stretching exercises. Resumo -Aquecimento é comumente utilizado para aumentar o desempenho e proteger contra lesões no esporte. No entanto, os efeitos de diferentes modalidades de aquecimento sobre o exercício máximo e subsequente período de recuperação não foram determinados. Este estudo objetivou avaliar o efeito de diferentes aquecimentos sobre o desempenho, pressão arterial e controle autonomico. 53 sujeitos descansavam por 5 minutos em seguida eram aleatoriamente alocados em um dos quatro grupos experimentais. Controle (CTR), Aquecimento aeróbio (AER) e alongamentos estático (SST) ou balístico (BST
Introdução: O alongamento muscular é uma prática popularmente realizada com o propósito de melhorar a qualidade de vida e o desempenho em atividades físicas. Alguns estudos científicos relatam efeitos deletérios desta prática relacionadas às respostas mecânicas e neurais para a realização do movimento, os quais poderiam ser diretamente interferentes em variáveis como o tempo de reação manual (TRM), visto que, rapidez e precisão nesta variável são fundamentais em diversas atividades da vida diária, em algumas profissões e, especialmente, para o desempenho em exercício.Objetivo: O presente comentário teve por objetivo examinar e discutir o efeito das diferentes técnicas e volumes de alongamento muscular sobre o TRM e suas consequências.Conclusão: O baixo volume de alongamento (≤ 30s), independentemente da técnica ou intensidade, não interfere sobre o TRM. Face ao que se apresenta na literatura sobre o tema, não é possível realizar julgamento conclusivo da associação de alto volume de alongamento (duração > 30s) com a resposta motora manual. Adicionalmente, é imperativo estudos que objetivem avaliar o efeito do alongamento sobre o TRM, em mulheres ou associado ao dimorfismo sexual.Influence of Muscle Stretching on Hand Reaction TimeIntroduction: Muscle stretching is a popular practice with the purpose of improving quality of life and performance in physical activities, although some scientific studies report negative effects related to mechanical and neural responses to the movement, which could directly interfere in variables such as hand reaction time (HRT). Since, speed and precision in this variable are fundamental in several activities of daily living, in some professions, and especially for performance in exercise.Objective: This commentary aims to examine the state of the art on the effect of different techniques and volumes of muscle stretching on HRT and its consequences.Conclusion: Literature suggests that stretching volume (≤ 30s), regardless of technique or intensity, is not able to interfere on HRT. On the other hand, it´s not possible to make a conclusive judgment on whether high stretching volume (> 30s) is able to compromise hand motor response. Additionally, other studies are imperative to evaluate the stretching effect on HRT for women, or its association to sexual dimorphism.
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