DOCSLIB.ORG

(Disambiguation). Page of One of the First Works Of

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
(Disambiguation). Page of One of the First Works Of Biomechanics Biomechanics For other uses, see Biomechanical (disambiguation). Page of one of the first works of Biomechanics (De Motu Animalium of Giovanni Alfonso Borelli) in the 17th century Biomechanics is the study of the structure and function of biological systems such as humans, animals, plants, organs, fungi, and cells[1] by means of the methods of mechanics.[2] Word history Edit The word "biomechanics" (1899) and the related "biomechanical" (1856) come from the Ancient Greek βίος bios "life" and μηχανική, m ē chanik ē "mechanics", to refer to the study of the mechanical principles of living organisms, particularly their movement and structure.[3] Method Edit Biomechanics is closely related to engineering, because it often uses traditional engineering sciences to analyze biological systems. Some simple applications of Newtonian mechanics and/or materials sciences can supply correct approximations to the mechanics of many biological systems. Applied mechanics, most notably mechanical engineering disciplines such as continuum mechanics, mechanism analysis, structural analysis, kinematics and dynamics play prominent roles in the study of biomechanics. Usually biological systems are much more complex than man-built systems. Numerical methods are hence applied in almost every biomechanical study. Research is done in an iterative process of hypothesis and verification, including several steps of modeling, computer simulation and experimental measurements. Subfields Edit Applied subfields of biomechanics include: Soft body dynamics Kinesiology (kinetics + physiology) Animal locomotion & Gait analysis Musculoskeletal & orthopedic biomechanics Cardiovascular biomechanics Ergonomy Human factors engineering & occupational biomechanics Implant (medicine), Orthotics & Prosthesis Rehabilitation Sports biomechanics Allometry Injury biomechanics Biotribology Biofluid mechanics Comparative biomechanics Computational biomechanics Sports biomechanics Edit Main article: Sports biomechanics In sports biomechanics, the laws of mechanics are applied to human movement in order to gain a greater understanding of athletic performance and to reduce sport injuries as well. It focuses on the application of the scientific principles of mechanical physics to understand movements of action of human bodies and sports implements such as cricket bat, hockey stick and javelin etc. Elements of mechanical engineering (e.g., strain gauges), electrical engineering (e.g., digital filtering), computer science (e.g., numerical methods), gait analysis (e.g., force platforms), and clinical neurophysiology (e.g., surface EMG) are common methods used in sports biomechanics.[4] Biomechanics in sports can be stated as the muscular, joint and skeletal actions of the body during the execution of a given task, skill and/or technique. Proper understanding of biomechanics relating to sports skill has the greatest implications on: sport©s performance, rehabilitation and injury prevention, along with sport mastery. As noted by Doctor Michael Yessis, one could say that best athlete is the one that executes his or her skill the best.[5] Continuum biomechanicsEdit The mechanical analysis of biomaterials and biofluids is usually carried forth with the concepts of continuum mechanics. This assumption breaks down when the length scales of interest approach the order of the micro structural details of the material. One of the most remarkable characteristic of biomaterials is their hierarchical structure. In other words, the mechanical characteristics of these materials rely on physical phenomena occurring in multiple levels, from the molecular all the way up to the tissue and organ levels. Biomaterials are classified in two groups, hard and soft tissues. Mechanical deformation of hard tissues (like wood, shell and bone) may be analysed with the theory of linear elasticity. On the other hand, soft tissues (like skin, tendon, muscle and cartilage) usually undergo large deformations and thus their analysis rely on the finite strain theory and computer simulations. The interest in continuum biomechanics is spurred by the need for realism in the development of medical simulation.[6]:568 Biofluid mechanics Edit Red blood cells.
Load more

Recommended publications
  • Have We Lost the “Mechanics” in “Sports Biomechanics”?
    1 Mechanical Misconceptions: Have we lost the 2 \mechanics" in \sports biomechanics"? a,b c d a 3 Andrew D. Vigotsky , Karl E. Zelik , Jason Lake , Richard N. Hinrichs a 4 Kinesiology Program, Arizona State University, Phoenix, Arizona, USA b 5 Department of Biomedical Engineering, Northwestern University, Evanston, IL, USA c 6 Departments of Mechanical Engineering, Biomedical Engineering, and Physical 7 Medicine & Rehabilitation, Vanderbilt University, Nashville, TN d 8 Department of Sport and Exercise Sciences, University of Chichester, Chichester, West 9 Sussex, UK Preprint submitted to Elsevier July 3, 2019 10 Abstract Biomechanics principally stems from two disciplines, mechanics and biology. However, both the application and language of the mechanical constructs are not always adhered to when applied to biological systems, which can lead to errors and misunderstandings within the scientific literature. Here we address three topics that seem to be common points of confusion and misconception, with a specific focus on sports biomechanics applications: 1) joint reaction forces as they pertain to loads actually experienced by biologi- cal joints; 2) the partitioning of scalar quantities into directional components; and 3) weight and gravity alteration. For each topic, we discuss how mechan- ical concepts have been commonly misapplied in peer-reviewed publications, the consequences of those misapplications, and how biomechanics, exercise science, and other related disciplines can collectively benefit by more carefully adhering to and applying concepts of classical mechanics. 11 Keywords: joint reaction force; weightlessness; misunderstandings; myths; 12 communication 13 1. Background 14 Biomechanics, as defined by Hatze (1974), \is the study of the structure 15 and function of biological systems by means of the methods of mechanics" 16 (p.
    [Show full text]
  • Biomechanical Modelling in Sports – Selected Applications
    Biomechanical modelling in sports – selected applications U. Hartmann1, G. Berti2, J.G. Schmidt1, T.M. Buzug3 1University of Applied Sciences Koblenz, RheinAhrCampus, Germany. 2NEC Europe Ltd., C&C Research Laboratories, St. Augustin, Germany. 3University of Luebeck, Institute for Biomedical Engineering, Germany. Abstract In the past decade computer models have become very popular in the fi eld of sports biomechanics due to the exponential advancements in computer technology. Biomechanical computer models can roughly be grouped into multi-body mod- els and numerical models. The theoretical aspects of both modelling strategies will be shortly introduced. This chapter focuses on the presentation of instructive application examples each representing a specialized branch within the fi eld of modelling in sports. Special attention is paid to the set-up of individual models of human body parts. In order to reach this goal a chain of tools including medical imaging, image acquisition and processing, mesh generation, material modelling and fi nite element simulation becomes necessary. The basic concepts of these tools are thoroughly described and fi rst results presented. The chapter ends with a short outlook into the future of sports biomechanics. Keywords: biomechanical models, mesh generation, fi nite elements, sports 1 Introduction 1.1 Why models? The fi eld of sports biomechanics suffers from one very severe restriction; in general it is not possible for ethical reasons to measure forces and pressure inside the human body. Thus, typical measurement technology in biomechanics works on the interface between the body and the environment. Force platforms for instance dynamically quantify reaction forces when a person is walking or run- ning across the sensor, electromyography (EMG) monitors action potentials of contracting muscles with electrodes detached to the human skin.
    [Show full text]
  • Fundamentals of Biomechanics Duane Knudson
    Fundamentals of Biomechanics Duane Knudson Fundamentals of Biomechanics Second Edition Duane Knudson Department of Kinesiology California State University at Chico First & Normal Street Chico, CA 95929-0330 USA [email protected] Library of Congress Control Number: 2007925371 ISBN 978-0-387-49311-4 e-ISBN 978-0-387-49312-1 Printed on acid-free paper. © 2007 Springer Science+Business Media, LLC All rights reserved. This work may not be translated or copied in whole or in part without the written permission of the publisher (Springer Science+Business Media, LLC, 233 Spring Street, New York, NY 10013, USA), except for brief excerpts in connection with reviews or scholarly analysis. Use in connection with any form of information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed is forbidden. The use in this publication of trade names, trademarks, service marks and similar terms, even if they are not identified as such, is not to be taken as an expression of opinion as to whether or not they are subject to proprietary rights. 987654321 springer.com Contents Preface ix NINE FUNDAMENTALS OF BIOMECHANICS 29 Principles and Laws 29 Acknowledgments xi Nine Principles for Application of Biomechanics 30 QUALITATIVE ANALYSIS 35 PART I SUMMARY 36 INTRODUCTION REVIEW QUESTIONS 36 CHAPTER 1 KEY TERMS 37 INTRODUCTION TO BIOMECHANICS SUGGESTED READING 37 OF UMAN OVEMENT H M WEB LINKS 37 WHAT IS BIOMECHANICS?3 PART II WHY STUDY BIOMECHANICS?5 BIOLOGICAL/STRUCTURAL BASES
    [Show full text]
  • Introduction to Sports Biomechanics: Analysing Human Movement
    Introduction to Sports Biomechanics Introduction to Sports Biomechanics: Analysing Human Movement Patterns provides a genuinely accessible and comprehensive guide to all of the biomechanics topics covered in an undergraduate sports and exercise science degree. Now revised and in its second edition, Introduction to Sports Biomechanics is colour illustrated and full of visual aids to support the text. Every chapter contains cross- references to key terms and definitions from that chapter, learning objectives and sum- maries, study tasks to confirm and extend your understanding, and suggestions to further your reading. Highly structured and with many student-friendly features, the text covers: • Movement Patterns – Exploring the Essence and Purpose of Movement Analysis • Qualitative Analysis of Sports Movements • Movement Patterns and the Geometry of Motion • Quantitative Measurement and Analysis of Movement • Forces and Torques – Causes of Movement • The Human Body and the Anatomy of Movement This edition of Introduction to Sports Biomechanics is supported by a website containing video clips, and offers sample data tables for comparison and analysis and multiple- choice questions to confirm your understanding of the material in each chapter. This text is a must have for students of sport and exercise, human movement sciences, ergonomics, biomechanics and sports performance and coaching. Roger Bartlett is Professor of Sports Biomechanics in the School of Physical Education, University of Otago, New Zealand. He is an Invited Fellow of the International Society of Biomechanics in Sports and European College of Sports Sciences, and an Honorary Fellow of the British Association of Sport and Exercise Sciences, of which he was Chairman from 1991–4.
    [Show full text]
  • Advantage of Biomechanics in Sports
    International Journal of Applied Research 2016; 2(5): 669-670 ISSN Print: 2394-7500 ISSN Online: 2394-5869 Impact Factor: 5.2 Advantage of biomechanics in sports IJAR 2016; 2(5): 669-670 www.allresearchjournal.com Received: 18-03-2016 Sravan Kumar Singh Yadav Accepted: 19-04-2016 Abstract Sravan Kumar Singh Yadav When coaches understand how forces work on muscles and affect motion in sports, they have a clear Research Scholar Department of Physical Education Guru advantage over those who lack this knowledge and its applications. Athletes who know the basic Ghasidas Vishwavidyalaya, concepts have a rationale for learning the correct way to execute skills. Knowing the reason behind Bilaspur (C.G.) learning a challenging technique gives them more motivation to master it. The key to success is finding effective instructional cues that help the athlete achieve correct mechanical technique. Coaches with a command of mental training tools and sports training principles can help athletes make amazing things happen on the field. Anatomy and physiology lay the foundation for biomechanics and kinesiology, areas of study about human movement. Keywords: Biomechanics, Sports 1. Introduction Sports biomechanics is a quantitative based study and analysis of professional athletes and sports activities in general. It can simply be described as the Physics of Sports. In this subfield of biomechanics the laws of mechanics are applied in order to gain a greater understanding of athletic performance through mathematical modeling, computer simulation and measurement. Biomechanics is the study of the structure and function of biological systems by means of the methods of “mechanics.” –which is the branch of physics involving analysis of the actions of forces.
    [Show full text]
  • Motor Performance and Control 473 CHANGES in COMPENSATORY
    Motor Performance and Control CHANGES IN COMPENSATORY VARIABILITY AS A FUNCTION OF TASK EXPERTISE AND DISTANCE DURING BASKETBALL SHOOTING Matthew Robins*, Keith Davids#, Roger Bartlett**, and Jonathan S. Wheat## *School of Science and Technology, Nottingham Trent University, UK #School of Human Movement Studies, Queensland University of Technology, Australia **School of Physical Education, University of Otago, New Zealand ##Faculty of Health and Wellbeing, Sheffield Hallam University, UK The purpose of this study was to identify how compensatory control of the shooting arm changed under the interacting constraints of task expertise and shooting distance. Expert, intermediate and novice male basketball players (n=10 in each group) performed 30 shots from three distances (4.25, 5.25 and 6.25 metres). The dependent variables included shooting performance together with variability of the wrist, elbow and shoulder joints at the instant of ball release. A significant main effect for expertise was observed for both shooting performance and shoulder joint variability at ball release. No significant main effects for expertise were found for either wrist or elbow joint variability at release. Quadratic regression analyses revealed greater compensatory control of the shooting arm for the expert participants compared to their intermediate and novice counterparts. The level of compensatory control shown also persisted with increasing shooting distance regardless of level of expertise. Findings are harmonious with existing data on movement variability during dynamic throwing tasks, specifically demonstrating how expert performers exploited variability in a functional manner to satisfy the constraints of the task. KEYWORDS: basketball shooting, dynamical systems theory, expertise, movement variability. INTRODUCTION: The advent of dynamical systems theory in the movement sciences has helped sports biomechanists to better understand the role of variability within human movement systems (e.g.
    [Show full text]
  • Biomechanics of Running
    Biomechanics of Running Previous To "Sports Biomechanics" Next Characteristics of Running Cycle Biomechanical Analysis of Running Special Considerations in Sprinting Special Considerations in Jogging 1. Hamilton, N., & Luttgens, K. 2002. Kinesiology, Scientific Basis of Human Motion, 10thed. Boston, MA: McGraw-Hill. Chapter 19, pp. 480-484. 2. Adelaar, R.S. 1986. The practical biomechanics of running. American Journal of Sports Medicine 14:497-500. 3. Cavanagh P.R. 1987. The biomechanics of the lower extremity action in distance running. Foot and Ankle 7:197-217. Characteristics of Running Cycle Running Cycle z contact phase (support phase; drive phase)： one foot is in contact with the ground, i.e., from foot strike to toe-off { foot strike { midsupport { take off z swing phase： the lower extremity is swinging through the air, i.e., from toe-off to foot strike { follow through { forward swing { foot descent Characteristics of Running z stride length and frequency tend to increase with increased running speed { stride length depends on leg length, range of motion of hip, and strength of leg extensors { stride frequency depends on speed of muscle contraction and the skill of running { for speeds over 7 m/s, a increment in stride length is small but the stride frequency is significantly greater z Both feet tend to fall on the same line along the path of progression. z With increasing running speed, duration of contact period decreases but that of swing phase increases. z As the foot strikes on the ground, the foot is in front of the COM of the body but the distance from foot contact to the COG is shorter in running as compared to walking.
    [Show full text]
  • Basic Mechanics: Kinematic Variables
    CHAPTER 1 Basic Mechanics: © GlobalStock/iStockphoto.com© Kinematic Variables Chapter Objectives At the end of this chapter, you will be able to: • Describe the three-dimensional reference frame used to analyze human movements • Explain the importance of the center of mass of a body • Describe diff erent types of motion • Explain the relationships between the kinematic variables of position, velocity, and acceleration • Use the equations of motion to determine the outcome of movement tasks • Describe the diff erent technologies that can be used to record linear and angular kinematic variables and the relative merits of each 9781284022124_CH01_001_028.indd 1 11/02/15 9:59 PM 2 Chapter 1 Basic Mechanics: Kinematic Variables Key Terms Acceleration First central difference Linear displacement Second central difference method method Angular displacement Position General motion Translation Central difference formulae Radial acceleration Kinematic variables Velocity Equations of motion Rotation 9781284022124_CH01_001_028.indd 2 11/02/15 9:59 PM The Mechanical Reference Frame 3 Chapter Overview Mechanics is the study of the forces that act on a body and the changes in motion aris- ing from these forces. This chapter will focus on the kinematic variables associated with a biomechanical analysis of human movements. Kinematic variables allow the description of the motion of a body without reference to variables that act to change the motion of the body. (The variables that act to change the motion of a body, kinetic variables, will be covered elsewhere.) An appreciation of the kinematic variables associated with an athlete’s movements will allow the strength and conditioning prac- titioner to use specific technologies to assess an athlete’s performance in a variety of movement tasks.
    [Show full text]
  • Biomechanical Evaluation of Movement in Sport and Exercise
    BIOMECHANICAL EVALUATION OF MOVEMENT IN SPORT AND EXERCISE Biomechanical Evaluation of Movement in Sport and Exercise offers a com- prehensive and practical sourcebook for students, researchers and practitioners involved in the quantitative evaluation of human movement in sport and exercise. This unique text sets out the key theories underlying biomechanical evaluation, and explores the wide range of biomechanics laboratory equipment and software that is now available. Advice concerning the most appropriate selection of equipment for different types of analysis, as well as how to use the equipment most effectively, is also offered. The book includes coverage of: • Measurement in the laboratory and in the field • Motion analysis using video and on-line systems • Measurement of force and pressure • Measurement of muscle strength using isokinetic dynamometry • Electromyography • Computer simulation and modelling of human movement • Data processing and data smoothing • Research methodologies Written and compiled by subject specialists, this authoritative resource provides practical guidelines for students, academics and those providing scientific support services in sport science and the exercise and health sciences. Carl J. Payton is Senior Lecturer in Biomechanics at Manchester Metropolitan University, UK. Roger M. Bartlett is Professor of Sports Biomechanics in the School of Physical Education, University of Otago, New Zealand. BIOMECHANICAL EVALUATION OF MOVEMENT IN SPORT AND EXERCISE The British Association of Sport and Exercise Sciences Guidelines Edited by Carl J. Payton and Roger M. Bartlett First published 2008 by Routledge 2 Park Square, Milton Park, Abingdon, Oxon OX14 4RN Simultaneously published in the USA and Canada by Routledge 270 Madison Ave, New York, NY 10016 This edition published in the Taylor & Francis e-Library, 2007.
    [Show full text]
  • {Download PDF} Sports Biomechanics: the Basics: Optimising Human Performance Kindle
    SPORTS BIOMECHANICS: THE BASICS: OPTIMISING HUMAN PERFORMANCE PDF, EPUB, EBOOK Dr. Anthony J. Blazevich | 256 pages | 15 Nov 2010 | Bloomsbury Publishing PLC | 9781408127490 | English | London, United Kingdom Sports Biomechanics: The Basics: Optimising Human Performance PDF Book After doing some basic analyses see Special Topic , you could find the theoretical optimum projection angle for any throw in any sport: baseball, softball, cricket and so on. For example, if a baseball bat has a weight added to it, rather like the bat weights used by batters in warm-up, we can change the inertia of the bat by changing the placement of the weight see Figure 7. So, its range is zero. While it is stationary at the top of the cliff, it has the potential to gain kinetic energy. Account Options Anmelden. Data from Hubbard et al. Because of the use of maths and physics to explain biomechanical concepts, students often find it difficult to grasp the basic elements of biomechanics. So the only practical thing to do is to improve the force developed by the muscles acting at the hip. When the angle of projection is too small e. Part 1: There are two things to remember always: 1 the flight time of an object equals time up plus time down, so if it starts and finishes at the same vertical height the total time equals time up multiplied by two and 2 the vertical velocity or final velocity of an object moving upwards is always zero because it stops briefly at the top of its trajectory before falling back down, so we know that the final velocity, vf, also equals zero.
    [Show full text]
  • Biomechanical Principles in Sprint Running
    Biomechanical Principles in Sprint Running Basic Concepts Iain Fletcher Content • Stride Length • Stride Frequency • Newton’s Laws • Running Mechanics • How to Run Faster!! Asafa Powell 9.77s Running Speed • Stride length x stride frequency • At faster running speeds (above 7m ·s-1) stride frequency increases more then stride length – Up to 2.6m stride length & 5Hz frequency • Force production increased with running speed – Up to 4.6 x body weight – NB 5.5 x body weight for a heel striker at 9.5m ·s-1 • Max speed ground contact 0.08- 0.1sec Mero et al. (1992) • increase in stride length, stride frequency, force production or decrease in ground contact will increase speed • What is your training designed to change? Newton’s 2 nd Law of Motion • Momentum • Law of acceleration • Rate of change of momentum of an object (acceleration) is proportional to the force causing it & takes place in the direction in which the force acts • = mass x velocity (mv) • Remember F =ma – So acceleration can be worked out from a known force quite easily (a=F/m) Impulse • Linked to Newton’s 2 nd Law • Force x time applied = impulse to an object • r= 0.74 between propulsive force & running velocity in 1 st contact after the blocks (Mero et al. , 1992) Impulse- Momentum Relationship • Need to exert a force to cause a change in velocity • Direction of force causes direction of acceleration • Increase force increases momentum • Or more precise increase impulse increases momentum Newton’s 3rd Law of Motion • For every action (force) exerted by 1 object on a 2 nd , there is an equal & opposite reaction (force) exerted by the 2 nd object on the 1 st – e.g.
    [Show full text]
  • Human Body Dynamics: Classical Mechanics and Human Movement
    Human Body Dynamics: Classical Mechanics and Human Movement Aydın Tözeren Springer Human Body Dynamics Aydın Tözeren Human Body Dynamics Classical Mechanics and Human Movement With 177 Illustrations Aydın Tözeren Department of Biomedical Engineering The Catholic University of America Washington, DC 20064 USA [email protected] Illustrations by Dr. Rukmini Rao Mirotznik. Cover photo © copyright Laurie Rubin/The Image Bank. Library of Congress Cataloging-in-Publication Data Tözeren, Aydın. Human body dynamics : classical mechanics and human movement / Aydın Tözeren. p. cm. Includes bibliographical references and index. ISBN 0-387-98801-7 (alk. paper) 1. Human mechanics. I. Title. QP303.T69 1999 612.7Ј6—dc21 99-15365 Printed on acid-free paper. © 2000 Springer-Verlag New York, Inc. All rights reserved. This work may not be translated or copied in whole or in part without the written permission of the publisher (Springer-Verlag New York, Inc., 175 Fifth Avenue, New York, NY 10010, USA), except for brief excerpts in connection with reviews or schol- arly analysis. Use in connection with any form of information storage and retrieval, elec- tronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed is forbidden. The use of general descriptive names, trade names, trademarks, etc., in this publication, even if the former are not especially identified, is not to be taken as a sign that such names, as understood by the Trade Marks and Merchandise Marks Act, may accordingly be used freely by anyone. Production coordinated by Chernow Editorial Services, Inc., and managed by Francine McNeill; manufacturing supervised by Erica Bresler. Typeset by Matrix Publishing Services, Inc., York, PA.
    [Show full text]