Winkelhorst, L. (Luuk) (2016) Internal and external training load of small-sided games in professional football. thesis, Sport Sciences.
Full text available on request.Abstract
Purpose: This study examined the effect of small-sided games (SSG) formats on the relationships between internal training load measures, external training load measures and between internal- and external training load measures in professional football players. Methods: Eighteen professional football players (age 21.8 ± 3.0) were monitored during SSG training across 15 individual training sessions. Internal training load measures (heart rate exertion index [HREI], session-RPE [sRPE]) and external training load measures (total covered distance [TCD], player load [PL], high speed distance [HSD; >15km/h]) were measured. SSG training sessions were categorized by format (11x11, 9x9/8x8, 7x7/6x6 and 5x5/4x4). The relationships between internal- and external training load measures were calculated using Pearson correlations. Furthermore, a principle component analysis (PCA) was conducted for each SSG format. Extraction criteria were an eigenvalue greater than 1, and SSG formats extracting more than 1 principle component were subjected to a varimax rotation. Results: HREI and sRPE showed significant correlations in the 11x11 format and the 7x7/6x6 format, r = .55 and r = .30, respectively. TCD, PL and HSD demonstrated moderate to very large correlations (r = .32 - .87, p < .05) across all SSG formats, except for PL and HSD in the 7x7/6x6 format. The internal- and external training load measures demonstrated no significant correlations across, except for HREI with HSD (r = .45) and TCD (r = .44) in the 9x9/8x8 format and the 5x5/4x4 format, respectively. The PCA established two principle components across all SSG formats, where most variance was explained by PL, TCD and HSD embracing the first principle component (external load), and the variance explained by HREI and sRPE together form the second principle component (internal load). Conclusions: The main finding was that there was no correlation between internal- and external training load for each of the SSG formats. Consequently, the PCA demonstrates two principle components, an internal load component and an external load component, for each SSG format. These findings suggest that a combination of an internal- and an external training load measure is necessary to determine the training load of SSG formats in training sessions.
| Item Type: | Thesis (UNSPECIFIED) |
|---|---|
| Supervisor name: | Borghuis, dr. A. and Lemmink, prof. dr. K.A.P.M. |
| Faculty: | Medical Sciences |
| Date Deposited: | 04 May 2022 08:32 |
| Last Modified: | 04 May 2022 08:32 |
| URI: | https://umcg.studenttheses.ub.rug.nl/id/eprint/3212 |
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