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Does Angular Acceleration Provide New Insight into Functional Performance of Athletes?

Year: 2023

Presenter Name: Vincent Veibell

Returning from Injury
Current return to play (RTP) protocols after concussion assess an athlete's progress towards full recovery using self-reported symptoms without measurements of on-field performance. There is no consideration of one's functional performance, in part, because capturing objective measures of functional performance obtained on the field is difficult. The Catapult inertial measurement units (IMUs) system collects on-field kinematics which can be analyzed in external software after collection. However, the commercial system and pre-defined metrics do not quantify all features that are relevant to concussion recovery, such as angular motion. Before applying the system to RTP after concussion, the purpose of the study was to validate the Catapult player load metric, which is focused on linear motion, and construct additional metrics based on angular motion. Methods:
To conduct a preliminary investigation, example Catapult data from one practice was obtained for one athlete. Predefined metrics at 10 Hz and raw IMU data at 100 Hz were extracted. Linear and angular jerk were calculated by taking the first and second derivatives of the acceleration and angular velocity data, respectively. To validate the commercial output of Player Load, the coefficient of determination (R2) compared the cumulative magnitude of linear jerk to Player Load at each instant in time. R2 values compared instantaneous jerk and angular jerk to determine if angular jerk provides additional information. Results:
Our calculated linear jerk accurately reflected the Catapult player load metric (R2=1.000). Linear jerk explained 48.9% of the variance in angular jerk (R2=0.489). Discussion:
Measures of linear and angular on-field motion can be captured using commercial systems currently being used in competitive athletics. As over 50% of the variance is not captured by commercial standard input, angular jerk may provide new insight into assessing on-field movements and functional performance. Future work will implement existing linear and new angular metrics to investigate RTP after concussion.
University / Institution: University of Utah
Type: Poster
Format: In Person
Presentation #D90
SESSION D (3:30-5:00PM)
Area of Research: Engineering
Faculty Mentor: Peter Fino