squat tasks for 3 different leg conditions, at 3 knee flexion angles. The leg conditions were control (contralateral intact ACL leg), unbraced (ACL affected leg), and braced (ACL affected leg). The 2 stability conditions were unstable single-leg squats on a wobble board and stable single-leg squats on
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The Effect of Functional Knee Braces on Muscular Contributions to Joint Rotational Stiffness in Anterior Cruciate Ligament–Deficient and –Reconstructed Patients
Aaron Derouin and Jim R. Potvin
The Element of Surprise: How Predictive Processing Can Help Coach Practitioners Understand and Develop Skilled Movement in Sport Settings
Katherine A. O’Brien, Andrew Kennedy, and Michael J. O’Keeffe
cognitive conflicts between prior performance knowledge and incoming sensory data to rapidly decide their best course of action ( Pezzulo & Cisek, 2016 ). Based on the notion that prior performance knowledge is harnessed in internal structures and that the development of stable, yet flexible, movement
Effects of Long-Haul Travel and the Olympic Games on Heart-Rate Variability in Rugby Sevens Medalists
Andrew A. Flatt and Daniel Howells
reflects cumulative effects from the preceding 7-day period, and the rolling LnRMSSDcv reflects the magnitude of fluctuation in values from the preceding 7-day period. Higher and more stable values are generally desirable in athletes, 6 , 14 whereas fluctuations and sustained reductions are associated
Methodological Considerations for Investigating Iron Status and Regulation in Exercise and Sport Science Studies
Alannah K.A. McKay, Marc Sim, Diego Moretti, Rebecca Hall, Trent Stellingwerff, Richard J. Burden, and Peter Peeling
investigations on iron metabolism in active, and athlete populations, addressing key factors such as the measurement of iron status, hepcidin and exercise interactions, dietary intake, female-specific considerations, and the use of stable iron isotope tracer methodologies. It is intended that this review can be
Total Energy Expenditure, Physical Activity Level, and Water Turnover of Collegiate Dinghy Sailors in a Training Camp
Hiroyuki Sagayama, Makiko Toguchi, Jun Yasukata, Kazunari Yonaha, Yasuki Higaki, and Hiroaki Tanaka
, incorporating a special silicone gasket for the best possible seal, and were wrapped tightly with Parafilm M (Bemis Co., Inc., Oshkosh, WI). We analyzed the urine samples with isotope ratio mass spectrometry (Hydra 20-20 Stable Isotope Mass Spectrometer; SerCon Ltd., Crewe, United Kingdom). The 18 O and 2 H
Relationships Among PlayerLoad, High-Intensity Intermittent Running Ability, and Injury Risk in Professional Rugby League Players
Billy T. Hulin, Tim J. Gabbett, Nathan J. Pickworth, Rich D. Johnston, and David G. Jenkins
Associations Changes in HR submax were investigated relative to each individual’s performance over the duration of the study and compared with injury risk. A within-individual z score was calculated for HR submax before being sorted into 3 categories: decrease ( z score, <−0.5), stable ( z score, −0.5 to
Personal and Social Environmental Correlates of Square Dancing Habits in Chinese Middle-Aged and Older Adults Living in Communities
Jing Liao, Sanmei Chen, Sha Chen, and Yung-Jen Yang
al., 2016 ). The formation of habitual PA, that is, exercising regularly in a consistent manner ( Laitakari, Vuori, & Oja, 1996 ), may further require the presence of unchanging environmental cues, for instance, a specific location, time of day ( Tappe, Tarves, Oltarzewski, & Frum, 2013 ), and stable PA
Sensitivity of Neuromechanical Predictions to Choice of Glenohumeral Stability Modeling Approach
Daniel C. McFarland, Alexander G. Brynildsen, and Katherine R. Saul
In vivo glenohumeral joint motion involves not only rotation, but also translation 1 ; modeling this mobile joint is challenging. Many musculoskeletal models neglect translation, representing the joint as a ball-and-socket. 2 – 4 This assumption makes the modeled joint inherently stable; however
Sex Differences in World-Record Performance: The Influence of Sport Discipline and Competition Duration
Øyvind Sandbakk, Guro Strøm Solli, and Hans-Christer Holmberg
and freestyle swimming were approximately 10% to 12%. However, the difference in men’s and women’s world records for 500-m speed skating was reduced to 7%. For all Olympic running events longer than 100 m, the sex differences in world records are relatively stable at 10% to 12%, without any clear
Foot and Ankle Kinematics During Descent From Varying Step Heights
Emily E. Gerstle, Kristian O’Connor, Kevin G. Keenan, and Stephen C. Cobb
been documented to transition from a rearfoot to forefoot strategy between single step heights of 10 cm and 20 cm. 12 The forefoot landing strategy is associated with a less stable ankle joint position and greater load placed on the distal foot. With respect to distal foot function, although
