Análise comparativa do equilíbrio em apoio unipodal em indivíduos sedentários e atletas

Com a evolução o homem assumiu a postura ereta, que é continuamente desafiada pela força da gravidade para manter o equilíbrio do corpo sobre a pequena base de sustentação representada pelos pés. Na busca de respostas adaptativas para o controle do equilíbrio analisa-se a oscilação do corpo durante a postura ereta com o uso de uma plataforma de força. Este estudo teve o objetivo de comparar as variáveis do equilíbrio unipodal em plataforma de apoio em sedentários e atletas. A amostra foi de conveniência, incluindo 12 voluntários do sexo masculino, seis sedentários e seis atletas, com idade entre 21 e 16 anos, respectivamente. Para a coleta de dados foi utilizada uma plataforma de força, na qual os indivíduos permaneceram, por 30 segundos, em apoio unipodal, lado dominante, com os olhos abertos. Com os resultados pode-se observar para atletas e sedentários, respectivamente: RMSAP 4,43(1,19) e 3,78(0,53), RMSML 3,08(0,73) e 2,43(0,33), COP 9,62(3,98) e 7,77(3,97), Velocidade AP 2,48(0,66) e 2,59(0,94), Velocidade ML 2,94(0,93) e 2,55(0,47), Frequência Média AP 0,59(0,2) e 0,64(0,16), Frequência Média ML 0,78(0,15) e 0,77(0,1). A análise estatística não evidenciou diferença significativa entre os grupos, para as variáveis analisadas. Desta forma, este estudo não encontrou diferença em apoio plantar e equilíbrio unipodal de atletas e sedentários. Through evolution, man assumed na unpright posture, wich is continuosly challenged by the gravity force to maintain the balance of the body on its small base of support represented by the feet.In the search for adaptative answers for the balance control the oscillation of the body during the upright posture with the use of a force platform.This study had the objective of comparing variables of unipodal balance in support platform in sedentary sujects and athletes. The sample was of convenience, including 12 volunteers of the male gender, six sedentary and six athletes, with ages between 21 and 16 respectively. To collect the data a force platform was used, on which the subjects remained for 30 seconds in unipodal support, dominant side with eyes opened. With the results can be observed for athletes and sedentary, respectively: RMSAP 4,43(1,19) e 3,78(0,53), RMSML 3,08(0,73) e 2,43(0,33), COP 9,62(3,98) e 7,77(3,97), AP Speed 2,48(0,66) e 2,59(0,94), ML Speed 2,94(0,93) e 2,55(0,47), average frequency AP 0,59(0,2) e 0,64(0,16), average frequency ML 0,78(0,15) e 0,77(0,1). Stastistical analysis showed no significant difference between groups for any variable. This study found no difference in plantar support and on-leg balance in athletes and sedentary

Photobiomodulation Therapy at 808 nm Does Not Improve Biceps Brachii Performance to Exhaustion and Delayed-Onset Muscle Soreness in Young Adult Women: A Randomized, Controlled, Crossover Trial

ObjectiveThis study aims to investigate the effects of laser photobiomodulation (PBM) at 808 nm on biceps brachii performance to exhaustion, rating of perceived exertion (RPE), and delayed onset muscle soreness (DOMS) in untrained young women.MethodsThirteen young women (20.1 ± 2.9 years) participated in a crossover study in which they received, in a counterbalanced manner, active and placebo laser PBM on two occasions (T1 and T2), separated by a 7-day washout period. During T1 and T2, participants received active (100 mW output power, irradiance of 35.7 W cm–2, and total energy of 28 J/arm) or placebo laser irradiation on the biceps brachii muscle at 20 min before the repetitions-to-failure test [six sets at 60% of one-repetition maximum (1RM) until failure] for elbow flexion exercise. The number of repetitions performed and RPE over the six sets, as well as DOMS from basal up to 72 h after the repetitions-to-failure test, were recorded.ResultsThere was a significant (time, p < 0.05) reduction in the number of repetitions performed and an increase in RPE over six sets, with no statistical differences between placebo and active laser conditions (treatment × time, p > 0.05). DOMS increased at 24 h postexercise and progressively returned to baseline after 72 h in both conditions (time, p < 0.05; treatment × time, p > 0.05).ConclusionOur results indicate that acute laser PBM at 808 nm does not improve biceps brachii performance to exhaustion, RPE, and DOMS in untrained women