Merks, B. (Brenda) (2017) Quantifying agility during small sided games: a new perspective on training load. thesis, Sport Sciences.
Full text available on request.Abstract
Background: Accelerations and changes of direction are considered key aspects of football. Unfortunately, these aspects are not included in commonly used training load indicators, although they are known to place high loads on players. Aim: The aim of the present study was to quantify agility load with the use of tracking sensor technology and assessing its criterion and construct validity. Methods: High level male youth football players (n=25, 16.8±1.3years, 179±7cm, 70.4±7.8kg) played three small sided games (SSG) (5v5, 5x4min) with different field dimensions. During these SSG, positional data of the players was obtained with a Local Position Measurement system. Agility load was quantified based on the interaction between speed and angular velocity. Additionally, external load (total distance covered, (very) high speed running distance, sprinting distance, #accelerations, #decelerations) and internal load (Rating of Perceived Exertion) were determined. Correlations and multiple linear regression analysis have been used to assess criterion validity. Construct validity was determined by testing the differences between the SSG with the use of a mixed linear model. Results: There were moderate correlations between agility load and #accelerations (r = .59) and #decelerations (r = .48). Accelerating was found to be the only indicator of agility load (R2=.35). Furthermore, it was found that agility load increased with smaller field dimensions, whereas distances covered decreased. Conclusion: These results suggest that including agility load, adds a unique aspect to quantifying training load. Keywords: changing direction, physical load, soccer, time-motion analysis
| Item Type: | Thesis (UNSPECIFIED) |
|---|---|
| Supervisor name: | Brink, dr. M.S. and Frencken, dr. W.G.P. |
| Faculty: | Medical Sciences |
| Date Deposited: | 10 May 2022 10:29 |
| Last Modified: | 10 May 2022 10:29 |
| URI: | https://umcg.studenttheses.ub.rug.nl/id/eprint/3256 |
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