The effect of fatigue on first stance phase kinetics during acceleration sprint running in professional football players. Issue 2 (3rd April 2021)

• Record Type: Journal Article
• Authors: Wdowski, Maximilian M.; Clarke, Neil; Eyre, Emma L.J.; Morris, Rhys; Noon, Mark; Eustace, Steven J.; Hankey, Joanne; Raymond, Leanne M; Richardson, Darren L.
• Is Part Of: Science and medicine in football. Volume 5:Issue 2(2021)
• Page Start: 90
• Page End: 96
• Publication Date: 2021-04-03
• Subjects: Biomechanics -- fatigue -- physiology -- kinetics -- performance; Soccer injuries -- Periodicals; Soccer -- Physiological aspects -- Periodicals; Sports medicine -- Periodicals; Soccer -- Psychological aspects -- Periodicals; 617.102763
• DOI: 10.1080/24733938.2020.1799064
• Languages: English
• ISSNs: 2473-3938

Abstract

ABSTRACT: Nineteen professional football players (Age: 26±5 years; Height: 1.84±0.08 m; Mass: 83.4±8.9 kg) completed three x 30 m maximal acceleration sprints from a standing start before completing the Yo-Yo intermittent recovery test level 1. Three x 30 m maximal acceleration sprints were then repeated post-fatigue. Light gates recorded sprint times from 0-5 m, 0-10 m, 0-15 m and 0-30 m. Force platforms collected ground reaction force of the first stance phase of the sprint run. Differences between pre- and post-fatigue were observed in the sprint times over 0-15 m (P = 0.015; CI [0.007, 0.110]) and 0-30 m (P = 0.004; CI [0.056, 0.234]). Peak medial-lateral ground reaction force was lower (P = 0.045; CI [-0.146, -0.005]) post- than pre-fatigue. The ratio of force were significantly different between pre- and post-fatigue for the medial-lateral and anterior-posterior comparison (P = 0.017; CI [-0.063, -0.010]), and the medial-lateral and vertical comparison (P = 0.012; CI [-0.036, -0.007]). Football players altered their sprint mechanics to reduce medial-lateral loading and orient the force in an increased anteroposterior and vertical direction in order to maintain 0-10 m sprint performance. Practitioners should observe medial-lateral force contributions and improve sprint technical efficacy.