The effects of multidirectional soccer-specific fatigue on markers of hamstring injury risk

Small, Katie; McNaughton, Lars R.; Greig, Matt; Lovell, Ric

doi:10.1016/j.jsams.2008.08.005

Cited by 222 publications

(261 citation statements)

References 24 publications

Supporting

Mentioning

227

Contrasting

Unclassified

Order By: Relevance

“…O valor de razão funcional sugerido para equilíbrio muscular acima descrito é em torno de 1, porém, evidencia-se que durante a partida de futebol ocorre fadiga muscular e o PT excêntrico dos isquiotibiais decai, principalmente, no final do primeiro tempo e final da partida, consequentemente diminuindo a razão I exc /Q con (5,6) . Desta forma, é importante que o atleta, apresente valores acima de 1, já que durante o jogo estes tendem a diminuir, tornando o atleta susceptível à lesão.…”

Section: Discussionunclassified

“…Sendo assim, as habilidades especí-ficas do futebol dependem da produção de força desses músculos (1,2) . Alguns investigadores sugerem que níveis insuficientes de força, principalmente dos isquiotibiais, podem estar associados a um risco acrescido de lesão dos tecidos moles (3)(4)(5)(6) . Por estas razões, a avaliação e o controle da força muscular assumem importância particular na monitorização dos efeitos dos programas de treino, bem como na prevenção de lesões (4) .…”

Section: Introductionunclassified

See 1 more Smart Citation

Avaliação Isocinética em Jogadores de Futebol Profissional e Comparação do Desempenho Entre as Diferentes Posições Ocupadas no Campo

Weber

Silva

Radaelli

et al. 2010

Rev Bras Med Esporte

View full text Add to dashboard Cite

RESUMOO objetivo geral deste estudo foi o de analisar os dados de pico de torque (PT) e índice de fadiga coletados em testes isocinéticos de atacantes (A), meias (M) e defesas (D), a fim de traçar um perfil destes atletas. A amostra foi constituída de 27 jogadores profissionais de futebol com média de idade de 26,55 ± 5,1 anos, divididos nos grupos A (seis), M (sete) e D (14). Os atletas foram submetidos a teste isocinético com cinco repetições máximas de flexão (concêntrica e excêntrica) e extensão (concêntrica) do joelho na velocidade de 60°/s e 30 repetições máximas de flexão e extensão (concêntricas) do joelho na velocidade de 300°/s. A partir dos dados coletados, foi observado que o grupo D apresentou valores significativamente mais elevados de PT concêntrico de flexores do lado dominante (LD) a 60°/s em comparação ao M (p = 0,05). No entanto, para as demais variáveis de PT e índice de fadiga não foram encontradas diferenças entre as posições. Com relação ao déficit bilateral (DB), os atletas apresentaram valores dentro da normalidade. Quanto às razões, foi observado que os jogadores encontravam-se dentro dos valores normativos para razão convencional, porém estavam abaixo dos valores normais para a razão funcional. Conclui-se que, apesar de desempenharem funções diferentes dentro do campo, isso não parece influenciar decisivamente a maioria das características neuromusculares dos membros inferiores nos atletas de futebol avaliados.Palavras-chave: futebol, funcional, razão convencional, fadiga e déficit bilateral. ABSTRACTThe aim of this study was to analyze the data collected from the peak torque (PT) and the fatigue index in isokinetic tests from forwards (F), midfielders (M) and defenders (D) in order to draw a profile of these athletes. Twenty-seven elite male soccer players (mean age 26.55±5.1 years) were tested, and divided in groups F (6), M (7) and D (14). They were submitted to an isokinetic test with five maximal repetitions of knee flexion (concentric and eccentric) and extension (concentric) at 60°/s and 30 maximal concentric repetitions (flexion and extension) at 300°/s. The collected data evidenced that group D showed significantly higher values of concentric flexors PT at 60 °/s on the dominant side (DS) compared to M (p = 0.05). However, for the other PT variables and fatigue index no differences were found between positions. Concerning bilateral deficit (BD), the athletes presented values within normality. Regarding ratios, it was observed that the players were within the normative values for conventional ratio, but were below the normal values for the functional ratio. We concluded that despite the different positions in the field the players have, this fact does not seem to dramatically influence on the majority of neuromuscular characteristics of lower limbs in the assessed soccer players.Keywords: soccer, functional, conventional ratio, fatigue and bilateral deficit. APARELHO LOCOMOTOR NO EXERCÍCIO E NO ESPORTE Artigo originAl INTRODUÇÃONa prática do futebol os membros inferiores são mu...

show abstract

Section: Discussionunclassified

Section: Introductionunclassified

Avaliação Isocinética em Jogadores de Futebol Profissional e Comparação do Desempenho Entre as Diferentes Posições Ocupadas no Campo

Weber

Silva

Radaelli

et al. 2010

Rev Bras Med Esporte

View full text Add to dashboard Cite

show abstract

“…in maximal force generating capacity, irrespective of the force required for a specified task [1][2][3][4][5][6][7][8] . Force production, movement coordination, motor control precision, muscle reaction times and proprioception have all been reported to be negatively affected by fatigue [1][2][3] .…”

mentioning

confidence: 99%

“…Force production, movement coordination, motor control precision, muscle reaction times and proprioception have all been reported to be negatively affected by fatigue [1][2][3] . These factors that are altered can be considered decrements in performance that may also contribute to the risk of injury through the inability to attenuate force and stabilize a joint [1,9] .…”

mentioning

confidence: 99%

“…The mechanisms causing these movements to be altered once a player reaches fatigue have yet to be examined, however, the effects of fatigue on both static and dynamic activities, focusing primarily on the lower extremity, have been extensively examined in other sports [2,3,[10][11][12][13][14][15][16] . While little research has aimed to examine kinematic differences in upper extremity movement patterns following fatigue, the literature available on the lower extremity has identified potential flawed mechanics that increase the risk of injury [2,3,[10][11][12][13][14][15][16] . For instance, movements that involve sudden change of direction, landing from a jump, and rapid stops are all non-contact mechanisms of injury that are greatly affected by lower extremity kinematics.…”

mentioning

confidence: 99%

See 1 more Smart Citation

The effects of aerobic fatigue on jump shot kinematics in team handball players

Plummer

Oliver

2015

JBEI

View full text Add to dashboard Cite

Background: Aerobic fatigue from running may contribute to altered kinematics and as a result the possibility of injury exists. The purpose of this study was to examine the effects of aerobic fatigue on jump shot kinematics in team handball players. Methods:Ten male team handball players (23.60 ± 3.06 years; 184.68 ± 8.78 cm; 84.76 ± 9.23 kg) volunteered. An electromagnetic tracking system was used to examine the kinematics of the jump shot prior to and following aerobic fatigue. The fatiguing protocol consisted of running to exhaustion at a speed that corresponded with 80% of their heart rate maximum.Results: Significant pelvis and trunk kinematic differences were observed following the aerobic fatigue protocol. For both the trunk (F 6, 54 = 5.10; P < .01; power = 0.99) and pelvis (F 3, 27 = 14.47; P < .01; power = 1.00) a three-way interaction of event x time x direction was observed. At foot contact, significant differences were observed for pelvis lateral flexion, pelvis rotation, and trunk flexion. The pelvis was positioned with greater lateral flexion to the contralateral side (-1.25° ± 3.41° to -3.39° ± 4.14°) and increased contralateral pelvis rotation was observed (-43.07° ± 12.92° to -50.79° ± 12.26°). Pelvis lateral flexion towards the contralateral side was also significantly greater at ball release following fatigue (-21.90° ± 5.99° to -25.55° ± 7.79°). Trunk rotation significantly increased from -6.80° ± 10.07° to -12.55° ± 10.97° at maximum external rotation following fatigue. Conclusion:Altered mechanics were observed at the pelvis and trunk and these alterations may contribute to injury in team handball players as a player reaches fatigue.

show abstract