3D propagation of the shock-induced vibrations through the whole lower-limb during running
TypeArticles dans des revues avec comité de lecture
Shock-induced vibrations to the feet have been related to the feel of comfort, the biomechanical control of performance, and the risk of fatigue or injury. Up to recently, the complexity of measuring the human biodynamic response to vibration exposure implied to focus most of the research on the axial acceleration at the tibia. Using wireless three-dimensional accelerometers, this paper investigates the propagation of shock-induced vibrations through the whole lower-limb during running in the temporal and the spectral domains. Results indicated that the vibrations were not consistent across the lower-limb, showing various spatial and spectral distributions of energy. The amount of energy was not constantly decreasing from the distal to the proximal extremity of the runner’s lower-limb, especially regarding the lateral epicondyle of the femur. Vibrations in the transversal plane of the segments were substantial compared to the longitudinal axis regarding the distal extremity of the tibia, and the lateral epicondyle of the femur. Further, the spectral content was wider at the distal than at the proximal end of the lower-limb. Finally, to get a thorough understanding of the risks incurred by the runners, the need to account for shock-induced vibrations up to 50 Hz has been stressed when investigating three-dimensional vibrations. The overall study raises attention on the substantial importance of the transverse components of the acceleration, and their potential relation to shear fatigue and injury during running.
Files in this item
Showing items related by title, author, creator and subject.
Vibration transmissibility and apparent mass changes from vertical whole-body vibration exposure during stationary and propelled walking CHADEFAUX, Delphine; MOORHEAD, Alex P.; MARZAROLI, Pietro; MARELLI, Stefano; MARCHETTI, Enrico; TARABINI, Marco (Elsevier, 2021)Whole-Body Vibration (WBV) is an occupational hazard affecting employees working with transportation, construction or heavy machinery. To minimize vibration-induced pathologies, ISO identified WBV exposure limits based on ...
CHADEFAUX, Delphine; GOGGINS, K.; CAZZANIGA, C.; MARZAROLI, Pietro; MARELLI, Stefano; KATZ, R.; EGER, T.; TARABINI, M. (Elsevier, 2019)Workers in mining, mills, construction and some types of manufacturing are exposed to vibration that enters the body through the feet. Exposure to foot-transmitted vibration (FTV) is associated with an increased risk of ...
NOUVEAU, Corinne; STEYER, Philippe; MOHAN RAO, Kumar Ram; LAGADRILLERE, Denis (Elsevier, 2011)The aim of the study is to apply a plasma nitriding process to the 90CrMoV8 steel commonly employed in wood machining, and to determine its efficiency to improve both mechanical and electrochemical properties of the surface. ...
RAM MOHAN RAO, K.; NOUVEAU, Corinne; TRINADH, Kalimi (Elsevier BV, 2019)The present concerns surface modification of low alloy CrMoV steel by following the route of plasma nitriding for the improvement of hardness. Plasma nitriding was performed at a low temperature of 450 oC. The maximum ...
RAM MOHAN RAO, K.; NOUVEAU, Corinne; KHANNA, A.S.; ANEJA, Karanveer S.; TRINADH, Kalimi (Elsevier BV, 2020)In the present studies, efforts were made to improve corrosion resistance of 90CrMoV8 tool steel by following plasma nitriding. Plasma nitriding of this steel at 500 oC for6and 8 h significantly improved the corrosion ...