Asymmetrical loading affects intersegmental dynamics during the swing phase of walking
| Autor: | Todd D. Royer, Philip E. Martin, Jeremy D. Smith |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Adult
Male medicine.medical_specialty media_common.quotation_subject Video Recording Biophysics Experimental and Cognitive Psychology Walking Kinematics Inertia Work related Functional Laterality Inverse dynamics Weight-Bearing Young Adult Physical medicine and rehabilitation medicine Humans Orthopedics and Sports Medicine Muscle Skeletal Gait Muscle Spindles media_common Physics Dynamics (mechanics) General Medicine Anatomy Models Theoretical Swing Biomechanical Phenomena medicine.anatomical_structure Moment (physics) Female Joints Ankle Gravitation |
| Zdroj: | Human Movement Science. 32:652-667 |
| ISSN: | 0167-9457 |
| Popis: | Much of the work related to lower extremity inertia manipulations has focused on temporal, kinematic and traditional inverse dynamics assessments during locomotion. Intersegmental dynamics is an analytical technique that provides further insights into mechanisms underlying linked-segment motion. The purpose of this study was to determine how intersegmental dynamics during the swing phase of walking are altered during asymmetrical lower extremity loading. Participants walked overground at a speed of 1.57 m s −1 with 0, 0.5, 1.0, and 2.0 kg attached to one foot. Net, interaction, gravitational, and muscle moments were computed. Moment magnitudes at joints of the loaded leg increased systematically with increasing load, whereas unloaded leg moments were unaffected by loading. With increasing load, relative contributions of interaction moments about the knee and hip and gravitational moment about the ankle increased (i.e., 21%, 8%, and 44% increases, respectively), whereas the relative contributions of muscle moments about all three joints declined (i.e., −4%, −13%, and −8% decreases for the ankle, knee, and hip, respectively for unloaded vs. 2.0 kg). These results suggest that altered inertia properties of the limb not only affected the amount of muscular effort required to swing the leg, but also changed the nature of the interaction between segments. |
| Databáze: | OpenAIRE |
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