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Electrophysiological assessment of neuromuscular adaptations to training
Vila-Chã, Carolina Júlia FélixTese de doutoramento. Engenharia Biomédica. Universidade do Porto. Faculdade de Engenharia. 2011
Adjustments in motor unit properties during fatiguing contractions after training
Vila-Chã, Carolina; Falla, Deborah; Correia, Miguel Velhote; Farina, DarioThe objective of the study was to investigate the effect of strength and endurance training on muscle fiber membrane properties and discharge rates of low-threshold motor units of the vasti muscles during fatiguing contractions. Methods: Twenty-five sedentary healthy men (age (mean T SD) = 26.3 T 3.9 yr) were randomly assigned to one of three groups: strength training, endurance training, or a control group. Co...
Changes in H reflex and V wave following short-term endurance and strength trai...
Vila-Chã, Carolina; Falla, Deborah; Correia, M.V.; Farina, DarioThis study examined the effects of 3 wk of either endurance or strength training on plasticity of the neural mechanisms involved in the soleus H reflex and V wave. Twenty-five sedentary healthy subjects were randomized into an endurance group (n 13) or strength group (n 12). Evoked V-wave, H-reflex, and M-wave recruitment curves, maximal voluntary contraction (MVC), and time-to-task-failure (isometric contr...
Eccentric exercise and delayed onset muscle soreness of the quadriceps induce a...
Vila-Chã, Carolina; Hassanlouei, H.; Farina, Dario; Falla, DeborahThis study investigates the effects of eccentric exercise and delayed onset muscle soreness (DOMS) of the quadriceps on agonist–antagonist activity during a range of motor tasks. Ten healthy volunteers (age, mean ± SD, 24.9 ± 3.2 years) performed maximum voluntary contractions (MVC) and explosive isometric contractions of the knee extensors followed by isometric contractions at 2.5, 5, 10, 15, 20, and 30% MVC a...
Effect of unaccustomed eccentric exercise on proprioception of the knee in weig...
Vila-Chã, Carolina; Riis, Simone; Lund, Ditte; Møller, Anders; Farina, Dario; Falla, DeborahThe study investigates the effects of eccentric exercise of the quadriceps on proprioception of the knee in weight and non-weight bearing tasks. Proprioception of the exercised leg was assessed at 120 and 150 of knee extension in 15 healthy adults (age 25.0 ± 3.6 yrs) before, immediately after, and 24 h following eccentric exercise of the quadriceps. Three tests of proprioception were performed: 1. matching t...
The effect of short-term endurance and strength training on motor unit conducti...
Vila-Chã, Carolina; Falla, Deborah; Velhote, Miguel; Farina, DarioAIM: The aim of this study was to investigate the effect of strength and endurance training on the conduction velocity of vastus medialis obliquus and lateralis single motor units during voluntary sustained knee extensions. METHODS: Seventeen sedentary healthy men (age, mean ± SD, 26.3 ± 3.9 yr) were randomly assigned to one of 2 groups: strength training (ST, n= 8) or endurance training (ET, n= 9). Convention...
Effects of eccentric exercise on force steadiness and activation of the knee ex...
Vila-Chã, Carolina; Falla, Deborah; Farina, DarioAIM: The purpose of this study was to investigate the effects of eccentric exercise of the knee extensors on force steadiness and neural drive to the vasti muscles during submaximal isometric contractions. METHODS: Ten healthy subjects (age, mean ± SD, 24.9 ± 3.2 yrs) participated in the study. The subjects performed maximum voluntary contractions (MVC) of the knee extensors followed by isometric contractions a...
Motor unit behavior during submaximal contractions following six weeks of eithe...
Vila-Chã, Carolina; Falla, Deborah; Farina, DarioThe study investigated changes in motor output and motor unit behavior following 6 weeks of either strength or endurance training programs commonly used in conditioning and rehabilitation. Twenty-eight sedentary healthy men (age, mean±SD, 26.1 ± 3.9 yrs) were randomly assigned to strength training (ST) (n = 9), endurance training (ET) (n = 10) or a control group (CT) (n = 8). Maximum voluntary contraction (MVC)...
Comparação cinemática e neuromuscular de um exercício de abdominais no solo e n...
Fernandes, E.; Oliveira, M.; Cruz, A.M.; Vila-Chã, Carolina; Silva, A.J.; Rocha, João; Barbosa, Tiago M.O objectivo deste estudo foi comparar a cinemática e a actividade neuromuscular em exercícios de abdominais no solo e na Fitball. Quinze jovens mulheres participaram voluntariamente neste estudo. Cada sujeito efectuou duas vezes, três séries de dez abdominais com um intervalo mínimo de 60 segundos entre cada série. O exercício foi efectuado uma vez no solo e outra na Fitball. Os dados cinemáticos e neuromuscula...
Differences in motor unit behavior following endurance and strength training
Vila-Chã, Carolina; Falla, Deborah; Velhote, Miguel; Farina, DarioAim: Strength and endurance training are two common forms of motor training which induce distinct adaptive neuromuscular responses. There is a considerable debate on the neural adaptations which accompany strength training and little is known about the effects of endurance training. This study investigated changes in motor output and motor unit behavior following 6 weeks of either strength or endurance training...
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