title: Kinematic and electromyographic analysis in patients with patellofemoral pain syndrome during single leg triple hop test.
abstract: Possible delays in pre-activation or deficiencies in the activity of the dynamic muscle stabilizers of the knee and hip joints are the most common causes of the patellofemoral pain syndrome (PFPS). The aim of the study was to compare kinematic variables and electromyographic activity of the vastus lateralis, biceps femoris, gluteus maximus and gluteus medius muscles between patients with PFPS and health subjects during the single leg triple hop test (SLTHT). This study included 14 female with PFPS (PFPS group) and 14 female healthy with no history of knee pain (Healthy group). Kinematic and EMG data ware collected through participants performed a single session of the SLTHT. The PFPS group exhibited a significant increase (p<0.05) in the EMG activity of the biceps femoris and vastus lateralis muscles, when compared with the healthy group in pre-activity and during the stance phase. This same result was also found for the vastus lateralis muscle (p<0.05) when analyzing the EMG activity during the eccentric phase of the stance phase. In kinematic analysis, no significant differences were found between the groups. These results indicate that biceps femoris and vastus lateralis muscles mainly during the pre-activation phase and stance phases of the SLTHT are more active in PFPS group among healthy group.
authors.affiliation: Department of Rehabilitation Science, Human Motion Analysis Laboratory, Universidade Nove de Julho, São Paulo, Brazil. Electronic address: marcelomkal@hotmail.com.
authors.forename: Marcelo Martins
authors.initials: MM
authors.lastname: Kalytczak
authors.affiliation: Department of Rehabilitation Science, Human Motion Analysis Laboratory, Universidade Nove de Julho, São Paulo, Brazil. Electronic address: plucareli@hotmail.com.
authors.forename: Paulo Roberto Garcia
authors.initials: PRG
authors.lastname: Lucareli
authors.affiliation: Department of Rehabilitation Science, Human Motion Analysis Laboratory, Universidade Nove de Julho, São Paulo, Brazil. Electronic address: acrfisio@globo.com.
authors.forename: Amir Curcio
authors.initials: AC
authors.lastname: Dos Reis
authors.affiliation: Department of Rehabilitation Science, Human Motion Analysis Laboratory, Universidade Nove de Julho, São Paulo, Brazil. Electronic address: andrebley@hotmail.com.
authors.forename: André Serra
authors.initials: AS
authors.lastname: Bley
authors.affiliation: Department of Rehabilitation Science, Human Motion Analysis Laboratory, Universidade Nove de Julho, São Paulo, Brazil. Electronic address: biasottogonzalez@gmail.com.
authors.forename: Daniela Aparecida
authors.initials: DA
authors.lastname: Biasotto-Gonzalez
authors.affiliation: Department of Rehabilitation Science, Human Motion Analysis Laboratory, Universidade Nove de Julho, São Paulo, Brazil. Electronic address: jcorrea@uni9.pro.br.
authors.forename: João Carlos Ferrari
authors.initials: JCF
authors.lastname: Correa
authors.affiliation: Department of Rehabilitation Science, Human Motion Analysis Laboratory, Universidade Nove de Julho, São Paulo, Brazil. Electronic address: fabianopolitti@gmail.com.
authors.forename: Fabiano
authors.initials: F
authors.lastname: Politti
mesh_terms: D001696:Biomechanical Phenomena; D004576:Electromyography / Q000379:methods*; D005080:Exercise Test / Q000379:methods*; D005260:Female; D006801:Humans; D007866:Leg / Q000503:physiopathology*; D018482:Muscle, Skeletal / Q000503:physiopathology*; D010147:Pain Measurement; D046788:Patellofemoral Pain Syndrome / Q000175:diagnosis / Q000503:physiopathology*; D055815:Young Adult
keywords: Electromyography; Hop test; Kinematics; Patellofemoral pain syndrome