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Jaimie A. Roper, Ryan T. Roemmich, Mark D. Tillman, Matthew J. Terza, and Chris J. Hass

The mechanics of human gait require control of movement in all 3 anatomical planes in order to safely and efficiently navigate our environment. Movements in the sagittal plane are often the primary focus of locomotor research because walking most commonly occurs with a forward orientation and many

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Thomas Haugen, Jørgen Danielsen, Leif Olav Alnes, David McGhie, Øyvind Sandbakk, and Gertjan Ettema

Athletic sprint running performance is regulated by a complex interaction of numerous factors. Many studies have examined the mechanics of linear sprinting, with the majority focusing on spatiotemporal variables. The fastest runners maximize their acceleration and sprinting velocities by applying

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Dorsey S. Williams III, Irene S. McClay, Joseph Hamill, and Thomas S. Buchanan

High- and low-arched feet have long been thought to function differently. The purpose of this study was to investigate the relationship between arch structure and lower extremity mechanics in runners with extreme pes planus and pes cavus. It was hypothesized that low-arched individuals would exhibit an increased rearfoot eversion excursion, eversion/tibial internal rotation ratio, and increased angular velocity in rearfoot eversion when compared to high-arched runners. In addition, it was hypothesized that high-arched runners would exhibit greater vertical loading rates. Twenty high-arched and 20 low-arched runners with histories of running-related injuries were included in this study. Low-arched runners were found to have increased rearfoot eversion excursion, eversion to tibial internal rotation ratio, and rearfoot eversion velocity. High-arched runners had increased vertical loading rate when compared to low-arched runners. These results suggest that arch structure is associated with specific lower extremity kinematics and kinetics. Differences in these parameters may subsequently lead to differences in injury patterns in high-arched and low-arched runners.

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Hannah Horris, Barton E. Anderson, R. Curtis Bay, and Kellie C. Huxel Bliven

The clinical assessment of breathing and the use of breathing exercises in the rehabilitation of musculoskeletal conditions has increased over the last decade. 1 Altered breathing mechanics have been linked to numerous musculoskeletal conditions, 2 – 7 and breathing exercises are being recognized

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Tobias Alt, Igor Komnik, Jannik Severin, Yannick T. Nodler, Rita Benker, Axel J. Knicker, Gert-Peter Brüggemann, and Heiko K. Strüder

sprint velocity. 1 , 6 – 8 In this context, an important role has been attributed to hamstring mechanics. 6 , 9 , 10 Within the last 5 years, a growing body of research investigated the late swing phase. 4 , 7 , 11 Within this movement phase, the hamstrings’ major action occurs while the knee joint

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Carlos Balsalobre-Fernández, Hovannes Agopyan, and Jean-Benoit Morin

There is a large body of research highlighting the importance of monitoring running mechanics for both performance and injury prevention purposes. 1 – 4 From the performance enhancement perspective, the measurement of leg stiffness, vertical oscillation of the center of mass, and ground contact

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Grégoire P. Millet, Rosalie Trigueira, Frédéric Meyer, and Marcel Lemire

mass), ventilatory (eg, ventilation, VO 2 max), and biomechanical/neuromuscular (eg, muscle recruitment, running mechanics) factors would interact to determine the time course of performance capacity in athletes. This assumption of a potential (deleterious) influence of prolonged altitude exposure on

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Matthew S. Briggs, Claire Spech, Rachel King, Mike McNally, Matthew Paponetti, Sharon Bout-Tabaku, and Laura Schmitt

related to knee health in youth who are OB while promoting physical activity is critical for the preservation of both immediate and long-term knee joint integrity. 8 Alterations in sagittal plane knee mechanics are common in those with knee OA and in those who are OB. 9 – 18 For example, adults with knee

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Maggi M. Calo, Thomas Anania, Joseph D. Bello, Valerie A. Cohen, Siobhan C. Stack, Meredith D. Wells, Barbara C. Belyea, Deborah L. King, and Jennifer M. Medina McKeon

affect inter-tablet reliability, there is a possibility that the sex differences in landing mechanics or even variations in clothing could influence measurement error. Future research should test different populations and find the maximum level of positional variability that is acceptable in clinical

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Emily E. Gerstle, Kristian O’Connor, Kevin G. Keenan, and Stephen C. Cobb

lower-limb mechanics during stair-climbing . J Bone Joint Surg Am . 1980 ; 62 ( 5 ): 749 – 757 . PubMed doi:10.2106/00004623-198062050-00008. 7391098 10.2106/00004623-198062050-00008 10. Mian OS , Thom JM , Narici MV , Baltzopoulos V . Kinematics