Mulder, G.R. (Ruud) (2021) Discriminative power of an IMU sensor setup to quantify biomechanical load between soccer players at different levels of play. thesis, Sport Sciences.
Full text available on request.Abstract
Introduction: Soccer specific activities place the lower extremities under considerable biomechanical load. To quantify these loads around hip and knee on the field, a new inertial measurement unit (IMU) sensor setup is recently developed. Criterion validity is established in the lab and field. A next step is to assess whether this new sensor setup discriminates between soccer players at different levels of play. This would further support the validity of the sensor setup, provide reference values, and demonstrate its feasibility when used on the field in soccer-specific tasks. Aim: The aim of this study is to assess the discriminative power of an inertial sensor setup to quantify biomechanical load between soccer players of different level of play during soccer specific field tests. Methods: National (n = 7) and regional (n = 10) soccer players were tested for countermovement jump (CMJ), instep soccer kick, 30m sprint and a soccer specific training drill. Participants were measured using IMU’s, a force plate, local positioning measurement (LPM) and differential rating of perceived exertion (dRPE). Biomechanical load indicators for hip and knee (Total acceleration squared (TAA2) and segment load) were calculated together with valid performance indicators (e.g., jump height, maximal angular velocity and maximal velocity) and commonly used training load indicators (e.g., distances in speed zones, dRPE scores and body load). Load and performance indicators were compared between groups, and associations between both were assessed. Results: Across all performance tests, no significant differences between groups at either the load or performance indicators were found. For the drill, the LPM system found significantly more TD sprinting for the national players (p<0.05). Regarding relations on the drill, segment load of the thigh correlated positively with total distance (TD) jogging, r = .49, TD running, r = .43, and correlated negatively with TD sprinting, r = -.52. TAA2 of the knee, r = .53, segment load of the thigh, r =.59 and segment load of the shank, r = .59 were positively related to Body load. Conclusion: The IMU sensor setup was not able to discriminate the two groups on either of the tests. Lack of contrast between groups appears a likely explanation, since test performances was the same. Moderate to strong significant correlations between load parameters of the IMU sensor setup and LPM system supports the idea that the local biomechanical load indicators contribute to commonly used global external load indicators. Future research could develop new biomechanical load parameters that could better discriminate between levels of play in a sample with more contrast. Keywords: Inertial Measurement Unit, Biomechanical load, Construct validity, lower body kinematics, Football
| Item Type: | Thesis (UNSPECIFIED) |
|---|---|
| Supervisor name: | Brink, dr. M.S. and Bastiaansen, B.J.C. |
| Faculty: | Medical Sciences |
| Date Deposited: | 13 May 2022 14:16 |
| Last Modified: | 13 May 2022 14:16 |
| URI: | https://umcg.studenttheses.ub.rug.nl/id/eprint/3310 |
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