title: Relationships of peak leg power, 1 maximal repetition half back squat, and leg muscle volume to 5-m sprint performance of junior soccer players.
abstract: Performance over very short distances (1-5 m) is important in soccer. We investigated this in 23 male regional-level soccer players aged 17.2 +/- 0.7 years, filming body markers to determine the average velocity and acceleration over the first step (V(S) and A(S)) and the first 5 m (V(5), A(5)). Data were related to scores on a force-velocity test, squat jump (SJ), countermovement jump (CMJ), and 1 maximal repetition (1 RM) half back squat. Leg and thigh muscle volumes were also assessed anthropometrically. V(5) was positively correlated with leg and thigh muscle volumes (r = 0.61, p < 0.05; r = 0.43, p < 0.05, respectively), SJ power (absolute and relative to body mass, r = 0.45, p < 0.05; r = 0.43, p < 0.05, respectively), absolute force-velocity leg power (r = 0.49, p < 0.05), and 1 RM half back squat (r = 0.66, p < 0.001). The use of dimensional exponents did not change coefficients materially. V(S) was also correlated with leg muscle volume and 1 RM back half squat (r = 0.56, p < 0.01; r = 0.58, p < 0.01, respectively) and more weakly with force-velocity leg power and SJ force (r = 0.49, p < 0.05; r = 0.46, p < 0.5, respectively). However, the CMJ was unrelated to velocity or acceleration. Sprinting ability is correlated with measures of power and force such as the force-velocity test, SJ, and 1 RM half back squat; such measures thus offer useful guidance to soccer coaches who wish to improve the short-distance velocity of their players.
authors.affiliation: Research Unit Evaluation and Analysis of Factors Influencing Sport Performance, ISSEP of Ksar Said, Tunis, Tunisia. csouhaiel@yahoo.fr
authors.forename: Mohamed Souhaiel
authors.initials: MS
authors.lastname: Chelly
authors.forename: Najet
authors.initials: N
authors.lastname: Chérif
authors.forename: Mohamed Ben
authors.initials: MB
authors.lastname: Amar
authors.forename: Souhail
authors.initials: S
authors.lastname: Hermassi
authors.forename: Mourad
authors.initials: M
authors.lastname: Fathloun
authors.forename: Ezdine
authors.initials: E
authors.lastname: Bouhlel
authors.forename: Zouhair
authors.initials: Z
authors.lastname: Tabka
authors.forename: Roy J
authors.initials: RJ
authors.lastname: Shephard
mesh_terms: D000293:Adolescent; D054874:Athletic Performance / Q000502:physiology; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D006801:Humans; D007866:Leg / Q000502:physiology*; D008297:Male; D009068:Movement / Q000502:physiology; D053580:Muscle Strength / Q000502:physiology; D018482:Muscle, Skeletal / Q000033:anatomy & histology / Q000502:physiology*; D012420:Running / Q000502:physiology*; D012916:Soccer / Q000502:physiology*; D013848:Thigh / Q000033:anatomy & histology / Q000502:physiology