title: Neuromuscular, physiological and endocrine responses to a maximal speed training session in elite games players.
abstract: The aim of this study was to determine the acute neuromuscular, biochemical and endocrine responses to a maximal speed training (MST) session. Eighteen male rugby players completed the protocol, which involved performing six maximal effort repetitions of 50 m running sprints with 5 minutes recovery between each sprint. Testosterone (T), cortisol (C), creatine kinase (CK), lactate (La), perceived muscle soreness (MS) and counter movement jump were collected immediately pre (PRE), immediately post (IP), 2 hours post (2P) and 24 hours post (24P) the sprint session. A bimodal recovery pattern was observed from the jump parameters with several declining significantly (p ≤ 0.05) IP, recovering 2P and suffering a secondary decline 24P. CK and perceived MS were elevated IP and continued to rise throughout the protocol, while La was only elevated IP. T and C were unaffected IP but showed significant declines 2P. These data indicate that MST results in a bimodal recovery pattern of neuromuscular function with changes most likely being related to metabolic and biochemical responses.
authors: a English Institute of Sport , Loughborough University , Loughborough , UK.|b A-STEM , Swansea University , Swansea , UK.
authors: Michael
authors: M
authors: Johnston
authors: c School of Sport, Health and Exercise Science , Bangor University , Bangor , UK.
authors: Christian J
authors: CJ
authors: Cook
authors: d Faculty of Engineering, Imperial College, Hamlyn Centre , Institute of Global Health Innovation , London , UK.
authors: Blair T
authors: BT
authors: Crewther
authors: e Ulster Rugby , Belfast , UK.
authors: David
authors: D
authors: Drake
authors: b A-STEM , Swansea University , Swansea , UK.
authors: Liam P
authors: LP
authors: Kilduff
mesh_terms: D000328:Adult; D003402:Creatine Kinase / Q000032:analysis; D015444:Exercise / Q000502:physiology*; D005538:Football / Q000502:physiology*; D006801:Humans; D008297:Male; D063806:Myalgia / Q000378:metabolism*; D012420:Running / Q000502:physiology*; D013739:Testosterone / Q000032:analysis; D055815:Young Adult
chemical_list: D013739:Testosterone; D003402:Creatine Kinase
keywords: Testosterone; cortisol; creatine kinase; neuromuscular fatigue