title: Effect of ischemic preconditioning on repeated sprint ability in team sport athletes.
abstract: This study investigated whether ischemic preconditioning (IPC) in a trained population affected repeated sprint performance. A secondary aim was to assess responses according to gender. Sixteen (nine females and seven males) well trained team sport athletes took part in a randomised crossover study design. Participants underwent an IPC and placebo treatment involving three periods of 5 min occlusion applied unilaterally (3 × 5 min occlusion to each leg) at either 220 mmHg or 50 mmHg. Each period of occlusion was followed by 5 min reperfusion. Following treatment 5 × 6 s maximal effort sprints were undertaken on a cycle ergometer against 7.5% body mass, each interspersed by 24 s recovery. Measured parameters included peak power, total power, percentage decrement, post-exercise blood lactate and ratings of perceived exertion. Nor within subject main effect for IPC was observed, neither was there an interaction effect with gender. Effect sizes were trivial (ES < 0.2) with the exception of a moderate (ES < 1.2) change in post-exercise blood lactate in the female cohort (1.6 ± 0.4 mmol⁻¹ lower following IPC). Results suggest no benefit to team sport players in utilising IPC as a means of enhancing repeated sprint performance. A lower blood lactate response in female participants following IPC may suggest improved blood flow through vasodilation.
authors.affiliation: a Centre for Sport and Exercise , Heriot-Watt University , Edinburgh , EH14 4AS , Scotland.
authors.forename: Neil
authors.initials: N
authors.lastname: Gibson
authors.forename: Ben
authors.initials: B
authors.lastname: Mahony
authors.forename: Claire
authors.initials: C
authors.lastname: Tracey
authors.forename: Samantha
authors.initials: S
authors.lastname: Fawkner
authors.forename: Andrew
authors.initials: A
authors.lastname: Murray
mesh_terms: D000328:Adult; D054874:Athletic Performance / Q000502:physiology*; D015992:Body Mass Index; D018592:Cross-Over Studies; D005080:Exercise Test; D005260:Female; D006688:Hockey / Q000502:physiology*; D006801:Humans; D019194:Ischemic Preconditioning; D019344:Lactic Acid / Q000097:blood; D008297:Male; D010465:Perception; D005082:Physical Exertion; D012420:Running / Q000502:physiology*; D012737:Sex Factors; D012916:Soccer / Q000502:physiology*; D055815:Young Adult
chemical_list: D019344:Lactic Acid
keywords: power; preconditioning; repeated sprint ability; team sports