title: Relationships between match activities and peak power output and Creatine Kinase responses to professional reserve team soccer match-play.
abstract: The specific movement demands of soccer that are linked to post-match recovery and readiness to train are unclear. Therefore, we examined the relationship between Global Positioning System (GPS) variables and the change (Δ; from baseline) in Creatine Kinase (CK) concentrations and peak power output (PPO; during the countermovement jump) at 24h and 48h post-match. Fifteen English Premier League reserve team players were examined over 1-4 matches. Measurements of CK and PPO were taken before (24h prior to match-play) and after (+24h and +48h) each game during which movement demands were quantified using 10Hz GPS data. High intensity distance covered (r=0.386, p=0.029; r=-0.349; p=0.050), high intensity distance covered⋅min(-1) (r=0.365, p=0.040; r=-0.364, p=0.040), high speed running distance (r=0.363, p=0.041; r=-0.360, p=0.043) and the number of sprints⋅min(-1) (r=0.410, p=0.020; r=-0.368, p=0.038) were significantly related to ΔCK and ΔPPO at +24h post-match, respectively. No relationships were observed between any match variables and ΔCK and ΔPPO after +48h of recovery. These findings highlight that high intensity match activities are related to ΔCK and ΔPPO in the 24h, but not 48h, following soccer match-play. Such information is likely of interest to those responsible for the design of soccer player's training schedules in the days following a match.
authors.affiliation: Health and Life Sciences, Northumbria University, Newcastle-upon-Tyne, United Kingdom.
authors.forename: M
authors.initials: M
authors.lastname: Russell
authors.affiliation: Applied Sports Technology Exercise and Medicine Research Centre (A-STEM), Swansea University, Swansea, United Kingdom; Swansea City Association Football Club, Swansea, United Kingdom.
authors.forename: W
authors.initials: W
authors.lastname: Sparkes
authors.affiliation: Applied Sports Technology Exercise and Medicine Research Centre (A-STEM), Swansea University, Swansea, United Kingdom; Swansea City Association Football Club, Swansea, United Kingdom.
authors.forename: J
authors.initials: J
authors.lastname: Northeast
authors.affiliation: School of Sport, Health and Exercise Sciences, Bangor University, Bangor, United Kingdom.
authors.forename: C J
authors.initials: CJ
authors.lastname: Cook
authors.affiliation: Applied Sports Technology Exercise and Medicine Research Centre (A-STEM), Swansea University, Swansea, United Kingdom.
authors.forename: R M
authors.initials: RM
authors.lastname: Bracken
authors.affiliation: Applied Sports Technology Exercise and Medicine Research Centre (A-STEM), Swansea University, Swansea, United Kingdom; Welsh Institute of Performance Sciences (WIPS), Swansea University, Swansea, United Kingdom. Electronic address: l.kilduff@swansea.ac.uk.
authors.forename: L P
authors.initials: LP
authors.lastname: Kilduff
mesh_terms: D000222:Adaptation, Physiological / Q000502:physiology; D003402:Creatine Kinase / Q000097:blood*; D040362:Geographic Information Systems; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D009043:Motor Activity / Q000502:physiology*; D005082:Physical Exertion / Q000502:physiology*; D012420:Running / Q000502:physiology*; D012916:Soccer / Q000502:physiology*; D055815:Young Adult
chemical_list: D003402:Creatine Kinase
keywords: Eccentric; Fatigue; Football; GPS; Motion analysis; Muscle damage