Estudo biomecânico da preensão manual em atletas de diferentes modalidades esportivas / Biomechanic study of handgrip in athletes of different sportive modalities

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

Handgrip can be decisive for certain sports in specific situations. This work constitutes an analysis of handgrip biomechanic variables in tests for maintaining continuous isometric and maximum interval strength in athletes that use this movement in their sport and in non-athletes. The intention is to compare the differences in characteristics among the groups, between dominant hand (DH) and non-dominant hand (NDH) in each test, in a way that identifies parameters that supply quantitative information concerning performance and training methodology, in the different kinds of sports. Participants in the study included fifty male subjects: 29 athletes that practice aikido (AI), jujutsu (JJ), judo (JU) and rowing (RO), and 21 non-athletes. The test for continuous handgrip (CT) consisted of maintaining maximum isometric force for 2 minutes, and the interval test (IT), maximum muscle contractions every 1 second (1Hz) for 4 minutes. The analysis was of maximum strength, strength measured at determined moments, final strength, percentage of normalized strength decrease and stabilization point of the strength curve. The highest levels of strength were observed in the JJ group, regardless of which test was carried out. In the tests comparing the different sports, significant statistical differences had the variables of: Fmax, F15s, F30s (DH, CT); F6s, F9s, F12s, F15s, F30s, F60s, F90s, F114,330s, F150s, F180, F210s (DH, IT) and Fmax, F3s, F6s, F9s, F12s, F15s, F180s, F210s (NDH, IT) between the NA and JJ, as well as the variables Fmax, F3s, F6s, F9s, F12s, F15s (NDH, CT) among NA, AI and JJ. In addition, significant statistical differences were observed between DH and NDH having the variables: F6s, F9s, F12s, F15s (CT, JJ); F3s, F6s, F9s, F12s, F15s, F30s, %F9s, %F30s, %F60s (CT, JU); %F9s (CT, RO); Fmax, F3s, F6s, F9s, F12s, F90, Ffinal (CT, AI); F3s, F6s, F9s, F12s, F15s, F30s, F60s, %F6s, %F9s, %F12s, %F15s, %F30s, Pestab. (IT, JJ); F114,330s, F150s, F180s, F210s, Ffinal, %F3s, %F6s, %F9s, Pestab (IT, JU); F210s, Ffinal, (IT, RO). Comparing the NA group to all the athletes in just one group (AA) significant statistical differences were found in all the strength variables for DH (regardless of the type of test) and with the variables: Fmax., F3s, F6s, F9s, F12s, F15s e F30s (NDH, CT); Fmax., F3s, F6s, F9s, F12s, F15s, F30s, F60s e F90s (NDH, IT); %F6s, %F9s, %F12s, %F15s, %F30s, %F60s (DH, CT); %F3s, %F6s (NDH, CT), %F90s, %F150s, %F180s (DH, IT); %F210s (NDH, IT). These two groups showed differences between DH and NDH with the variables: Fmax., F3s, F6s, F9s, F12s, F15s, F30s, F60s, %F9s, %F12s, %F15s, %F30s, %F60s (CT, AA); %Ftotal, Fmax, F3s, F6s, F9s, F12s, F15s, Ffinal (CT, NA); Fmax., F3s, F6s, F9s, F12s, F15s, F30s, F60s, F90s, F114,330s, F150s, F180s, F210s, Ffinal, %F3s, %F6s, %F9s, %F12s, %F15s (IT, AA); Fmax., F3s, F6s, F9s, F12s, F15s, F30s, F60s, %F114,330s, %F150s (IT, NA). The suitability for the interval muscular contraction was demonstrated by the athletes superior performance in strength. The difference found between the athletes hands in both tests indicates the necessity for work with muscular compensation. Strength decrease values can determine the time of muscular fatigue in handgrip and be part of the athletes competition strategy.

ASSUNTO(S)

mãos contração muscular handgrip biomechanics biomecânica dynamometer educacao fisica hand muscle contraction dinamômetro preensão manual

ACESSO AO ARTIGO

Documentos Relacionados