Objectives This study aims to compare the Russian and Aussie currents in the force gain and hypertrophy of the forearm muscles responsible for the grip. Patients and methods This double-blind, prospective, randomized-controlled study included a total of 30 healthy women (mean age: 20.2±1.7 years; range, 18 to 25 years) between May 2018 and July 2018. The participants were randomly divided into three groups: control group (CG, n=10), Aussie current group (ACG, n=10), and Russian current group (RCG, n=10). All three groups underwent a force test with a gripping dynamometer and the collection of images of the superficial and deep flexor muscles of the fingers with diagnostic ultrasound. The CG received a fictious current stimulus, while the other two groups received the designated stimuli from their currents. Further evaluations were performed after 24 h of the 12th application of the current. Results For grip, there were no significant differences in the moment of evaluation and interaction, while the effect size yielded certain points to advantages of force gain for the group using the RCG. The thickness of the superficial muscles showed a significant difference for the first evaluation between CG and RCG (p=0.014) and between RCG and ACG (p=0.010), indicating a larger effect size for RCG. Conclusion Our study results show that the Russian current is proven to be the mode which yields the most optimal results.
Objetivo: Identificar o efeito de variáveis mecânicas e fisiológicas sobre o nível de desempenho no judô, sendo elas: controle do equilíbrio; força de preensão palmar; altura de salto; potência mecânica muscular dos membros inferiores; índices de elasticidade (IE) e de fadiga (IF). Métodos: Amostra composta por 17 atletas de judô, de ambos os sexos, recrutados de forma intencional e não probabilística. Cada voluntário participou de uma bateria de testes realizada em um único encontro. Foi aplicado o teste de desempenho específico de judô Special Judo Fitness Test – SJFT. Na sequência realizou-se medidas de equilíbrio, preensão palmar e os testes de salto para: avaliação da potência mecânica muscular dos membros inferiores; IE e IF. Utilizou-se o Generalized Linear Model (GLzM). Resultados: Apenas a altura no Squat Jump (A_SJ), que apresentou efeito positivo, e o IE, que apresentou negativo, afetaram o desempenho no SJFT. Conclusão: A A_SJ e o IE afetaram o desempenho no SJFT, sendo que maiores alturas de salto SJ predizem um desempenho aprimorado; e maior contribuição da energia elástica, com valores mais altos de IE, prediz um desempenho piorado. As demais variáveis (potência muscular, altura no Counter-Movement Jump, preensão palmar, equilíbrio e IF) não afetaram o desempenho no SJFT.
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