title: The Impact of Jumping during Recovery on Repeated Sprint Ability in Young Soccer Players.
abstract: This study compared the effect of counter-movement-jump (CMJ)-based recovery on repeated-sprint-ability (RSA). Eighteen male footballers (16 ± 0 years, 65 ± 10 kg, 1.74 ± 0.10 m) performed three RSA-tests. RSA-1/-3 were performed according to standard procedures, while three CMJs (over 10″) - as a potential fatigue-determinant and/or running mechanics interference--were administered during RSA-2 recoveries. RSA performance, exercise effort (fatigue index [FI], rating of perceived exertion [RPE], blood lactate concentration [BLa]), simple kinematics (steps number), vertical-jump characteristics (stretch-shortening-cycle-efficiency [SSCE] assessed before/after RSA) were investigated. ANOVA showed no differences between RSA-1,-3. During RSA-2, performance was lower than RSA-1/-3, while steps number did not change. During RSA-2, FI, BLa, RPE were higher than RSA-1/-3 (FI +21.10/+20.43%, P<0.05; BLa +16.25/+13.34%, P<0.05; RPE +12.50/+9.57%, P<0.05). During RSA-2, SSCE, as the CMJ/squat-jump-height-ratio, was not significantly different from RSA-1/-3. Passive recovery RSA allows better performance. Yet, RSA CMJ-based recovery is effective in increasing training load (FI, BLa, RPE) without perturbing running mechanics (simple kinematics, SSCE).
authors.affiliation: a University eCampus , Novedrate , Italy.
authors.forename: J
authors.initials: J
authors.lastname: Padulo
authors.forename: M
authors.initials: M
authors.lastname: Tabben
authors.forename: G
authors.initials: G
authors.lastname: Attene
authors.forename: L P
authors.initials: LP
authors.lastname: Ardigò
authors.forename: W
authors.initials: W
authors.lastname: Dhahbi
authors.forename: K
authors.initials: K
authors.lastname: Chamari
mesh_terms: D000293:Adolescent; D054874:Athletic Performance / Q000502:physiology*; D001696:Biomechanical Phenomena; D005080:Exercise Test; D006801:Humans; D019344:Lactic Acid / Q000097:blood; D008297:Male; D005082:Physical Exertion; D059385:Plyometric Exercise; D020127:Recovery of Function; D012420:Running / Q000502:physiology*; D012916:Soccer / Q000502:physiology*
chemical_list: D019344:Lactic Acid
keywords: exercise performance; fatigue; metabolism; recovery; soccer