Submitted by Sara Ribeiro (sara.ribeiro@ucb.br) on 2017-05-09T17:23:23Z No. of bitstreams: 1 ErikadaFonsecaReisSilvaDissertacao2012.pdf: 561877 bytes, checksum: 3f630bd567030506d73648840c89ab8a (MD5) / Approved for entry into archive by Sara Ribeiro (sara.ribeiro@ucb.br) on 2017-05-09T17:24:01Z (GMT) No. of bitstreams: 1 ErikadaFonsecaReisSilvaDissertacao2012.pdf: 561877 bytes, checksum: 3f630bd567030506d73648840c89ab8a (MD5) / Made available in DSpace on 2017-05-09T17:24:01Z (GMT). No. of bitstreams: 1 ErikadaFonsecaReisSilvaDissertacao2012.pdf: 561877 bytes, checksum: 3f630bd567030506d73648840c89ab8a (MD5) Previous issue date: 2012-06-01 / The proprioceptive neuromuscular facilitation (PNF) is a stretching technique used to increase the range of motion and presents superior results as compared with static stretching (SS). Thus, the aim of study was investigate and compare the effects of PNF and SS on maximal voluntary contraction (MVC) and muscle activation in indoor soccer players and sedentary individuals. Thirty-three adult men were divided into two groups: 1) sedentary (age, 21.3 ?? 1.8 years; height, 173.0 ?? 7.0 cm; weight, 68.7 ?? 9.6 kg) and 2) trained (age, 25.7 ?? 4.8 years; height, 175.5 ?? 5.0 cm; weight, 76.4 ?? 7.4 kg) who completed three different experimental trials on non-consecutive days separated by 72 h in a randomized order: static stretching (SS), PNF stretching (PNF), and no-stretching (NS). The isometric MVC of knee extension was evaluated before and immediately after each condition. Surface electromyography was recorded from the vastus lateralis (VL) and rectus femoris (RF) muscles of dominant leg during MVC test. PNF and SS techniques induced no decrease on isometric maximal muscular strength and muscle electromyographical activity in indoor soccer players (p>0.05). In addition, the electromyographical activity of the RF and VL was lower after SS only in the sedentary group (p???0.05). These results suggest that, short duration PNF SS stretching techniques have no effects on isometric MVC and muscle electromyographical activity in indoor soccer players. / A facilita????o neuromuscular proprioceptiva (FNP) ?? uma t??cnica de alongamento utilizada para aumentar a amplitude de movimento que apresenta resultados superiores quando comparado ao alongamento est??tico (AE). Neste sentido, o presente estudo teve por objetivo investigar e comparar os efeitos da FNP e do AE sobre a contra????o volunt??ria m??xima (CVM) e ativa????o muscular em jogadores de futsal, bem como em indiv??duos sedent??rios. Trinta e tr??s homens adultos foram divididos em dois grupos: 1) sedent??rio (idade, 21,3 ?? 1,8 anos; estatura, 173,0 ?? 7,0 cm; massa corporal, 68,7 ?? 9,6 kg) e 2) treinado (idade, 25,7 ?? 4,8 anos; estatura, 175,5 ?? 5,0 cm; massa corporal, 76,4 ?? 7,4 kg) que realizaram tr??s sess??es experimentais diferentes em dias n??o consecutivos separados por 72 h em ordem randomizada: AE, FNP e sess??o sem alongamento (SC). A CVM isom??trica da extens??o do joelho foi avaliada antes e imediatamente ap??s cada condi????o. A eletromiografia de superf??cie foi mensurada nos m??sculos vasto lateral (VL) e reto femoral (RF) do membro dominante durante o teste de CVM. A FNP e o AE n??o promoveram redu????o na for??a muscular isom??trica m??xima e atividade eletromiogr??fica em jogadores de futsal (p>0,05). Adicionalmente, a atividade eletromiogr??fica do RF e VL foi menor ap??s o AE apenas no grupo sedent??rio (p???0.05). Estes resultados sugerem que, o AE e a FNP de curta dura????o n??o exercem efeitos sobre a CVM isom??trica e atividade eletromiogr??fica muscular em jogadores de futsal.