The use of WBV did not immediately alter the performance of the quadriceps femoris and the electromyographic activity of vastus lateralis and vastus medialis muscles. In addition, it also did not interfere with pressure center oscillation of individuals subjected to anterior cruciate ligament reconstruction.
BackgroundKinesio Taping (KT) is an elastic bandage that aims to improve neuromuscular
performance, although there is no consensus as to its benefits.ObjectiveTo analyze the immediate and delayed effects of KT on the neuromuscular
performance of the femoral quadriceps, on balance, and lower limb function in
healthy subjects.MethodThis is a randomized controlled trial. Thirty-six women with a mean age of
22.2±3.6 years and BMI of 22.5±2.3 Kg/m2 were divided into three
groups: control, with ten minutes of rest (control, n=12), application of Kinesio
Taping without tension (placebo, n=12) and with tension (KT, n=12) on the
quadriceps. The primary outcome was isokinetic performance, while secondary
outcomes were the single-hop test, one-footed static balance, and
electromyographic activity. The evaluations were carried out in five stages: 1)
before application of KT, 2) immediately after the application of KT, 3) after
24h, 4) after 48h, and 5) after 72h. Mixed ANOVA was used to determine differences
between groups.ResultsThere was no change in one-footed static balance, electromyographic activity of
the VL in the lower limb function, nor in isokinetic performance between
groups.ConclusionKT promotes neither immediate nor delayed changes in neuromuscular performance of
the femoral quadriceps in healthy women.
Low-level laser therapy (LLLT) has been suggested as a resource capable of increasing resistance to fatigue and enhancing muscle performance through its metabolic and photochemical effects. This study evaluated the immediate effects of the application of LLLT on neuromuscular performance of the plantar ankle flexors in healthy subjects through a fatigue-induced protocol. This is a randomized controlled clinical trial, attended by 60 young and physically active volunteers of both genders. The subjects were randomly assigned into three groups, control, placebo, and laser, and underwent a preliminary evaluation of the isokinetic performance of plantar flexors and electromyographic activity of the soleus muscle to ensure homogeneity between groups. After the application of the respective intervention protocols, participants were induced to fatigue by performing 100 isokinetic concentric contractions of ankle plantar flexors at a speed of 90°/s. The dynamometric fatigue index (DFI) and median frequency were recorded during the fatigue protocol for comparison between groups. The group receiving the laser application showed significantly lower dynamometric fatigue index (p = 0.036) when compared to control and placebo groups. In relation to the median frequency during the fatigue test, there was a decrease in all groups, however with no differences between them. We suggest that LLLT being applied prior to exercise can reduce the fatigue index in the ankle plantar flexors of healthy subjects.
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