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Chapter 11 Angular Kinematics of Human Movement Basic Biomechanics, 6th edition By Susan J. Hall, Ph.D. McGraw­Hill/Irwin © 2012 The McGraw­Hill Companies, Inc. All rights reserved. Measuring Angles What is a relative angle? • angle at a joint formed between the longitudinal axes of adjacent body segments • AKA joint angle • the straight, fully extended position at a joint is regarded as zero degrees Basic Biomechanics, 6th edition By Susan J. Hall, Ph.D. 11-2 Measuring Angles The relative angle at the lead knee tends to be smaller during sprinting than during distance running. Basic Biomechanics, 6th edition By Susan J. Hall, Ph.D. 11-3 Measuring Angles What is an absolute angle? • angular orientation of a body segment with respect to a fixed line of reference • (reference lines are usually vertical or horizontal) Basic Biomechanics, 6th edition By Susan J. Hall, Ph.D. 11-4 Measuring Angles The absolute angle of the trunk with respect to vertical is often a quantity of interest in studies of lifting as related to low back pain. Basic Biomechanics, 6th edition By Susan J. Hall, Ph.D. 11-5 ... - tailieumienphi.vn
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