Biological systems are inherently variable, and this variability has been the focus of much research in the movement sciences. In human locomotion research, a commonly accepted convention has been that variability is a one-size-fits-all parameter; more is bad. This “negative” perspective towards
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Fractal Dynamics, Variability, and Coordination in Human Locomotion
Scott W. Ducharme and Richard E.A. van Emmerik
Strategies for the Control of Balance During Locomotion
Hendrik Reimann, Tyler Fettrow, and John J. Jeka
Being able to move from one place to another is an essential part of being an animal. Moving in a goal-directed way is a complex problem, and locomotion is no exception. It is especially hard for two-legged walkers such as us humans, because our center of mass (CoM) is relatively high above our
One or Many? A Brief History of Culture and Cultures in the Evolution of “Physical Culture”
Mark Dyreson
, built not only by anthropologists and historians but also by exercise physiologists and biomechanists, provides me with a biocultural launching pad that I need to meet these demands. 37 The new paradigm about the crucial role that locomotion played in both the natural and the cultural histories of the
Robotic Devices to Enhance Human Movement Performance
Daniel P. Ferris and Bryan R. Schlink
Robotic exoskeletons and bionic prostheses have moved from science fiction to science reality in the last decade. These robotic devices for assisting human movement are now technically feasible given recent advancements in robotic actuators, sensors, and computer processors. However, despite the ability to build robotic hardware that is wearable by humans, we still do not have optimal controllers to allow humans to move with coordination and grace in synergy with the robotic devices. We consider the history of robotic exoskeletons and bionic limb prostheses to provide a better assessment of the roadblocks that have been overcome and to gauge the roadblocks that still remain. There is a strong need for kinesiologists to work with engineers to better assess the performance of robotic movement assistance devices. In addition, the identification of new performance metrics that can objectively assess multiple dimensions of human performance with robotic exoskeletons and bionic prostheses would aid in moving the field forward. We discuss potential control approaches for these robotic devices, with a preference for incorporating feedforward neural signals from human users to provide a wider repertoire of discrete and adaptive rhythmic movements.
Embodiment in Active Sport Tourism: An Autophenomenography of the Tour de France Alpine “Cols”
Matthew Lamont
consciousness. Despite the breathtaking beauty of the Alpine landscapes, at times, immense physiological and cognitive demands placed on my cycling body nullified my conscious awareness of my unfamiliar surroundings to maintain locomotion. It was only after these bouts of inwardly focused “endurance work
Body Size and Movement
John H. Challis
, from this assumed body shape helps to illustrate the underlying physics. In the following subsections, three aspects of movement will be reviewed: locomotion, jumping, and strength expression. Locomotion Geometric scaling theory suggests that body mass scales in proportion to standing height to the
Optimizing Human Performance—A Brief History of Macro and Micro Perspectives
Mark S. Dyreson
component in efforts to unravel the riddle of optimization. A consensus has developed among scholars of human evolution that locomotion—in particular, the ability to run, jog, stroll, gambol, and so forth over long distances, even in the equatorial heat of the East African savannah—resides at the core of
Impact of Biomechanics Research on Society
Ronald F. Zernicke, Grant C. Goulet, Peter R. Cavanagh, Benno M. Nigg, James A. Ashton-Miller, Heather A. McKay, and Ton van den Bogert
As a field, biomechanics comprises research from the molecular and cellular levels, to tissues, to organs, to organisms and their movements. In the past 50 years, the impact of biomechanics research on society has been amplified dramatically. Here, we provide five brief summaries of exemplar biomechanics results that have had substantial impact on health and our society, namely 1) spaceflight and microgravitational effects on musculoskeletal health; 2) impact forces, soft tissue vibrations, and skeletal muscle tuning affecting human locomotion; 3) childbirth mechanics, injuries, and pelvic floor dysfunction; 4) prescriptive physical activity in childhood to enhance skeletal growth and development to prevent osteoporotic fractures in adulthood and aging; and 5) creative innovations in technology that have transformed the visual arts and entertainment.
A Systems Perspective on Postural and Gait Stability: Implications for Physical Activity in Aging and Disease
Richard E.A. van Emmerik, Stephanie L. Jones, Michael A. Busa, and Jennifer L. Baird
Postural instability, falls, and fear of falling that accompany frailty with aging and disease form major impediments to physical activity. In this article we present a theoretical framework that may help researchers and practitioners in the development and delivery of intervention programs aimed at reducing falls and improving postural stability and locomotion in older individuals and in those with disability due to disease. Based on a review of the dynamical and complex systems perspectives of movement coordination and control, we show that 1) central to developing a movement-based intervention program aimed at fall reduction and prevention is the notion that variability can play a functional role and facilitate movement adaptability, 2) intervention programs aimed at fall reduction should focus more on coordination and stability boundary measures instead of traditional gait and posture outcome variables, and 3) noise-based intervention techniques using stochastic resonance may offer external aids to improve dynamic balance control.
Clinical Biomechanics: Contributions to the Medical Treatment of Physical Abnormalities
Joseph Hamill, George Gorton, and Peter Masso
Biomechanics is defined as the application of the laws of mechanics to the study or structure and function of movement. It is a relatively new subdiscipline to the domain of kinesiology. Biomechanics was initially closely associated with the study of sports technique. However, over the years, biomechanics has taken on a much more diverse field of study. In this paper, we will describe the contributions that biomechanics has made to the area of clinical biomechanics research in terms of clinical assessment and outcomes and the design of clinical apparatus. The first example examines a clinical assessment of a cerebral palsy child. The goals of such a clinical assessment are 1) to determine the primary problems with the locomotion capabilities of the individual, 2) to recommend treatment options, and 3) to evaluate treatment outcomes. In the second example, a procedure is described for designing braces for scoliosis patients. For this example, a three-dimensional digital twin is developed using a scanning technique. This example illustrates the research conducted on developing a technique to noninvasively and safely determine the torso deformities resulting from scoliosis. While these examples are but two of a wide variety of examples that could be used, they illustrate the contribution of biomechanics to the clinical world.
