![]() ![]() In total, 240 signals of angular velocity from different body segments and types of strokes (forehand, backhand and service) were recorded from four players (two competition players and two beginners). The angular velocity of the IMU gyroscopes was compared to the angular velocity from the OMC system. Level of agreement was evaluated by correlation coefficients, magnitudes of errors in absolute and relative values and Bland-Altman plots. Differences between both systems were highly consistent within players’ skill (i.e., along the broad range of velocities) and axes (x, y, z). The magnitude of the differences ranged from 4.4 to 35.4 deg Correlations ranged from 0.951 to 0.993, indicating a very strong relationship and concordance. The difference relative to the maximum angular velocity achieved was less than 5.0%. The study concluded that IMUs and OMC systems showed comparable values. Thus, IMUs seem to be a valid alternative to detect meaningful differences in angular velocity during tennis groundstrokes in field-based experimentation. Country of Data Collection accelerometers only -arm, arm and trunk field Sweden, Denmark, Norway, Brazil, North America, Australia accelerometers only arm (inclination velocity) arm field 2008-2013 Norway, USA 80,82,83] arm, arm and trunk 80,82,83] field Sweden, Denmark, Brazil accelerometers only -arm, arm and trunk simulated Sweden, Brazil, USA accelerometers only arm (generalized velocity) arm simulated 2013, 2016 Sweden accelerometers with gyroscopes arm and trunk field 2014-2020 Sweden, France, Italy, Canada, USA accelerometers with gyroscopes arm (inclination velocity), arm and trunk arm, arm and trunk field 2016-2021 USA accelerometers with gyroscopes trunk field 2007-2018 Germany accelerometers with gyroscopes or magnetometers arm, arm and trunk simulated 2009-2017 France, USA accelerometers with gyroscopes arm (inclination velocity), trunk arm simulated 2016-2020 Italy, USA accelerometers with gyroscopes arm (generalized velocity) arm simulated 2017 Sweden. added code to prevent being able to close Connection Options or Trace Properties windows while a color picker window is still open as that could otherwise crash the app.Īccelerometer-based inclinometers have dominated kinematic measurements in previous field studies, while the use of inertial measurement units that additionally include gyroscopes is rapidly increasing.fixed bug that would make the built-in help view not accessible when opened from the Chart and Trace Properties windows.fixed bug that would tell the user that the scripting sockets are already in use when a 2nd instance of CoolTerm is launched and scripting sockets are enabled.Fixed bug that would cause traces to be drawn incorrectly when plotting against "Time of day" on the x-axis when timestamps include milliseconds.fixed bug that would overwrite some chart properties when the dialog opens.Fixed bug that caused the serial port info button to not be populated with information when the Connection Options window first opened. ![]() moving from a HiDPI screen to a non-HiDPI screen). Fixed bug that would freeze the terminal window in plain text mode when moving it between screens with different display scaling factors (e.g.CoolTerm no longer tries to open an send progress window when sending macros with a lot of text, to prevent a ThreadAccessingUI exception.Previous sessions are now restored even after an improper termination of the app. ![]()
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