3 research outputs found
Biomechanical evaluation in runners with Achilles tendinopathy
OBJECTIVES: To evaluate the clinical characteristics, ground reaction force (GRF), and function of the plantar muscles and dorsiflexors of the ankle in runners with and without Achilles tendinopathy (AT) and in nonrunners. METHODS: Seventy-two participants (42 men, 30 women; mean age: 37.3±9.9 years) were enrolled in this crosssectional study and divided into three groups: AT group (ATG, n=24), healthy runnersâ group (HRG, n=24), and non-runnersâ group (NRG, n=24). Both ankles were evaluated in each group. The American Orthopedic Foot and Ankle Society (AOFAS) Ankle-Hindfoot Scale was used for clinical and functional evaluation. GRF was evaluated using force plates and muscle strength was evaluated using an isokinetic dynamometer. RESULTS: The AOFAS scores were lower in the ATG. The strike impulse was higher in the ATG than in the HRG and NRG. However, GRF was similar among the groups. The ATG exhibited lower total work at 120o /s speed than the HRG. The peak torque in concentric dorsiflexion was lower in the NRG than in the ATG and HRG. The peak torque and total work in concentric plantar flexion were lower in the NRG than in the ATG. The peak torque and total work in eccentric plantar flexion were lower in the NRG than in the ATG and HRG. CONCLUSION: Runners with AT showed higher strike impulse, lower muscle strength of the plantar flexors, and higher clinical and functional damage
Clinical and biomechanical factors associated with Achilles tendinopathy in long distance runners
OBJETIVO: Avaliar caracterĂsticas clĂnicas, componente vertical da força de reação do solo e função muscular de flexores plantares e dorsais do tornozelo em corredores com e sem tendinopatia de calcĂąneo, e em indivĂduos nĂŁo corredores. MĂTODOS: Setenta e dois indivĂduos (42H: 30M, idade 37,3 ±9,9 anos) foram divididos em trĂȘs grupos: grupo tendinopatia de calcĂąneo (GTC, n= 24), grupo de corredores controle (GCC, n=24), e grupo de nĂŁo corredores (GNC, n=24), sendo que em cada grupo ambos os tornozelos foram avaliados. A AOFAS ankle-hindfoot score, parĂąmetros da força de reação do solo e dados isocinĂ©ticos foram avaliados usando plataformas de força e dinamĂŽmetro isocinĂ©tico. RESULTADOS: A AOFAS ankle-hindfoot score foi significativamente menor no GTC. A FRS foi igual entre os grupos, porĂ©m o impulso vertical inicial foi maior no GTC que GCC e GNC. NĂŁo houve diferenças para o impulso total. O GTC demonstrou menor trabalho total na velocidade 120Âș/s que GCC. NĂŁo houve diferenças para as outras variĂĄveis isocinĂ©ticas entre GTC e GCC, apenas em relação ao GNC. CONCLUSĂO: Os corredores com tendinopatia de calcĂąneo tĂȘm maior impacto no momento de aterrissagem, menor resistĂȘncia muscular dos flexores plantares e maior comprometimento clĂnico e funcional. A associação do maior impulso e menor resistĂȘncia pode ser um fator predisponente e mantenedor para lesĂŁo no tendĂŁo calcĂąneoOBJECTIVE: To evaluate the clinical characteristics, vertical component of the ground reaction force and muscle function of plantar flexors and dorsiflexors of the ankle in runners with and without Achilles tendinopathy and in non-runners. METHODS: Seventy-two subjects (42 M: 30W, 37.3±9.9 years old) were divided into three groups: Achilles Tendinopathy Group (GTC, n=24), Runners Control Group (GCC, n=24) and Non-Runners Group (GNC, n=24), in which both ankles were evaluated in each group. The American Orthopaedic Foot and Ankle Society (AOFAS) ankle-hindfoot score, parameters of ground reaction force, and isokinetic data were evaluated by means of force platforms and isokinetic dynamometer. RESULTS: The AOFAS ankle-hindfoot score was significantly lower in the GTC. The GRF was similar between the groups; however, the initial vertical impulse was higher in the GTC than in the GCC and GNC. There were no differences regarding the total impulse. The GTC presented lower total work in the 120Âș/s speed than the GCC. There were no differences regarding the other isokinetic variables between the GTC and GCC, only regarding the GNC. CONCLUSION: Runners with Achilles tendinopathy show higher impact at the moment of landing, lower muscle endurance of plantar flexors and higher clinical and functional damage. The association between higher impulse and lower endurance could be a predisposing and maintaining factor for Achilles tendo