title: Biomechanics of sit-to-stand transition after muscle damage.
abstract: The purpose of the study was to examine the effects of exercise-induced muscle damage on the biomechanics of the sit-to-stand transition (STST). Seventeen volunteers participated in an intense, eccentric based, muscle damage protocol of knee flexors and extensors via an isokinetic dynamometer. Kinematic and kinetic data were collected using a 10-camera optoelectronic system and a force plate 24h before and 48h after exercise. Statistical analysis showed significant differences in kinematic and kinetic parameters after exercise. Forty-eight hours after exercise, the strategy did change and the knee joint relative effort level increased significantly. Pelvic and hip kinematics, in conjunction with the knee extension joint moment, provided an efficient mechanism to support the participants' locomotor system during the STST. These results may be of great significance in designing supportive devices, as well as composing rehabilitation programs for young or elderly individuals, with various musculoskeletal pathologies.
authors.affiliation: Lab of Human Performance and Rehabilitation, Center for Research and Technology, Thessaly, Trikala, Greece; Department of Physical Education and Sport Science, University of Thessaly, Trikala, Greece.
authors.forename: Giannis
authors.initials: G
authors.lastname: Spyropoulos
authors.forename: Themistoklis
authors.initials: T
authors.lastname: Tsatalas
authors.forename: Dimitrios E
authors.initials: DE
authors.lastname: Tsaopoulos
authors.forename: Vasilios
authors.initials: V
authors.lastname: Sideris
authors.forename: Giannis
authors.initials: G
authors.lastname: Giakas
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D015444:Exercise; D005260:Female; D006801:Humans; D007700:Kinetics; D007719:Knee Joint / Q000502:physiology* / Q000503:physiopathology; D009068:Movement / Q000502:physiology*; D018482:Muscle, Skeletal / Q000293:injuries / Q000502:physiology / Q000503:physiopathology; D052097:Quadriceps Muscle / Q000293:injuries* / Q000502:physiology / Q000503:physiopathology; D016059:Range of Motion, Articular / Q000502:physiology; D013848:Thigh; D055815:Young Adult