The dose-response relationship between training load measures and changes in force-time components during a countermovement jump in male academy soccer players
Ellis, Matthew, Myers, Tony D., Taylor, Richard, Morris, Rhys and Akubat, Ibrahim (2022) The dose-response relationship between training load measures and changes in force-time components during a countermovement jump in male academy soccer players. International Journal of Sports Physiology and Performance. ISSN 1555-0273
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Abstract
Purpose: To manage physical performance in soccer, practitioners monitor the training load (TL) and the resulting fatigue. A method frequently used to assess performance is the countermovement jump (CMJ). However, the efficacy of CMJ to detect fatigue from soccer matches and training remains uncertain, as does the relationship between TL and change in CMJ performance. The aims of the present study are two-fold. One is to observe the changes of CMJ force-time components and jump height (JH). The second is to examine dose-response relationships between TL measures and CMJ over a 6-wk pre-season. Methods: Twelve professional male youth soccer players (17±1 year, 71.2±5.6 kg, 178±5.8 cm) were recruited. Daily changes in CMJ were assessed against baseline scores established before pre-season training, along with internal and external TL measures. A series of Bayesian random intercept models were fitted to determine probability of change above/below 0 and greater than the coefficient of variation (CV) established at baseline. Jumps were categorised into match-day minus (MD-) categories where the higher number indicated more time from a competitive match. Results: JH was lowest on MD-3 (28cm) and highest on MD-4 (34.6cm), with the probability of change from baseline CV highly uncertain (41% and 61% respectively). Changes to force-time components were more likely on MD-3 (21%-99%), which provided less uncertainty than JH. Bayes R2, ranged from 0.22-0.57 between TL measures and all CMJ parameters. Conclusion: Force-time components were more likely to change than JH. Practitioners should also be cautious when manipulating TL measures to influence CMJ performance.
| Item Type: | Article |
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| Additional Information: | Accepted author manuscript version reprinted, by permission, from International journal of sports physiology and performance, [2022] (ahead of print). © Human Kinetics, Inc. |
| Divisions: | Faculty of of Arts, Society and Professional Studies > Department of Health and Behavioural Sciences |
| Depositing User: | Ms Hazel Barham |
| Date Deposited: | 29 Sep 2022 12:12 |
| Last Modified: | 13 Oct 2022 12:42 |
| URI: | https://newman.repository.guildhe.ac.uk/id/eprint/17324 |
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