The purpose of this study was to obtain the trunk kinematics data during a change-of-direction task and to determine the relationship between trunk kinematics and the change-of-direction performance. The design of this investigation was a descriptive laboratory study. Twelve healthy male collegiate soccer players (age: 21.3 ± 1.0 yrs, body mass: 67. 7 ± 6.7 kg, and height: 1.75 ± 0.05 m) partic...

Field sport coaches must use reliable and valid tests to assess change-of-direction speed in their athletes. Few tests feature linear sprinting with acute change- of-direction maneuvers. The Change-of-Direction and Acceleration Test (CODAT) was designed to assess field sport change-of-direction speed, and includes a linear 5-meter (m) sprint, 45° and 90° cuts, 3- m sprints to the left and right...

This study aimed to examine the utility of inertial measurement unit (IMU) technology identify angle, step-specific, and side-specific differences between youth soccer players with without a history lower limb injury during soccer-specific field tests. Thirty-two youths (mean age 16.4 years) who were elite (Females n = 13, Males 19) wore IMUs pre- postseason change-of-direction assessments. A r...

Bacteria swim by rotating rigid helical flagella and periodically reorienting to follow environmental cues1,2. Despite the crucial role of reorientations, their underlying mechanism has remained unknown for most uni-flagellated bacteria3,4. Here, we report that uni-flagellated bacteria turn by exploiting a finely tuned buckling instability of their hook, the 100-nm-long structure at the base of...

Coercion has always been integral to the care and treatment of people who are mentally ill and there is no 'perfect' model in which coercion is absent. A number of interventions have shown promise in reducing the use of coercion, however, and we believe the evidence points to ways forward that may improve both the experience and the outcome of care.

Some listeners are insensitive to the direction of pure-tone frequency changes when the standard frequency is roved widely over trials, but less so when the standard frequency is fixed and trial-by-trial feedback is provided. The present experiment tested the hypothesis that fixing the standard frequency and providing feedback is advantageous for direction-impaired listeners because under these...

Upstream of Byrd Station (West Antarctica), ice-penetrating radar data reveal a distinctive fold structure within the ice, in which isochronous layers are unusually deep. The fold has an axis more than 50 kilometers long, which is aligned up to 45 degrees to the ice flow direction. Although explanations for the fold's formation under the present flow are problematic, it can be explained if flow...

IT is having a tremendous impact on most forms of business and the literature suggests large benefits from innovative applications. One major sector of the UK economy, retailing, is undergoing vast technological changes with the introduction of EPOS equipment and the associated developments in banking and financial services. However, the broader conceptual importance of IT in retailing is less ...