title: Interplay of biomechanical, energetic, coordinative, and muscular factors in a 200 m front crawl swim.
abstract: This study aimed to determine the relative contribution of selected biomechanical, energetic, coordinative, and muscular factors for the 200 m front crawl and each of its four laps. Ten swimmers performed a 200 m front crawl swim, as well as 50, 100, and 150 m at the 200 m pace. Biomechanical, energetic, coordinative, and muscular factors were assessed during the 200 m swim. Multiple linear regression analysis was used to identify the weight of the factors to the performance. For each lap, the contributions to the 200 m performance were 17.6, 21.1, 18.4, and 7.6% for stroke length, 16.1, 18.7, 32.1, and 3.2% for stroke rate, 11.2, 13.2, 6.8, and 5.7% for intracycle velocity variation in x, 9.7, 7.5, 1.3, and 5.4% for intracycle velocity variation in y, 17.8, 10.5, 2.0, and 6.4% for propelling efficiency, 4.5, 5.8, 10.9, and 23.7% for total energy expenditure, 10.1, 5.1, 8.3, and 23.7% for interarm coordination, 9.0, 6.2, 8.5, and 5.5% for muscular activity amplitude, and 3.9, 11.9, 11.8, and 18.7% for muscular frequency). The relative contribution of the factors was closely related to the task constraints, especially fatigue, as the major changes occurred from the first to the last lap.
authors.affiliation: Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, Rua Dr Plácido Costa 91, 4200-450 Porto, Portugal.
authors.forename: Pedro
authors.initials: P
authors.lastname: Figueiredo
authors.forename: David R
authors.initials: DR
authors.lastname: Pendergast
authors.forename: João Paulo
authors.initials: JP
authors.lastname: Vilas-Boas
authors.forename: Ricardo J
authors.initials: RJ
authors.lastname: Fernandes
mesh_terms: D054874:Athletic Performance / Q000502:physiology*; D001696:Biomechanical Phenomena; D004734:Energy Metabolism; D006801:Humans; D016014:Linear Models; D018482:Muscle, Skeletal / Q000502:physiology*; D011597:Psychomotor Performance; D013550:Swimming / Q000502:physiology*; D055815:Young Adult