title: The Effect of Ischemic Preconditioning on Repeated Sprint Cycling Performance.
abstract: OBJECTIVE
  Ischemic preconditioning enhances exercise performance. We tested the hypothesis that ischemic preconditioning would improve intermittent exercise in the form of a repeated sprint test during cycling ergometry.
  
  
  METHODS
  In a single-blind, crossover study, 14 recreationally active men (mean ± SD age, 22.9 ± 3.7 yr; height, 1.80 ± 0.07 m; and mass, 77.3 ± 9.2 kg) performed twelve 6-s sprints after four 5-min periods of bilateral limb occlusion at 220 mm Hg (ischemic preconditioning) or 20 mm Hg (placebo).
  
  
  RESULTS
  Ischemic preconditioning resulted in a 2.4% ± 2.2%, 2.6% ± 2.7%, and 3.7% ± 2.4% substantial increase in peak power for sprints 1, 2, and 3, respectively, relative to placebo, with no further changes between trials observed for any other sprint. Similar findings were observed in the first three sprints for mean power output after ischemic preconditioning (2.8% ± 2.5%, 2.6% ± 2.5%, and 3.4% ± 2.1%, for sprints 1, 2, and 3, respectively), relative to placebo. Fatigue index was not substantially different between trials. At rest, tissue saturation index was not different between the trials. During the ischemic preconditioning/placebo stimulus, there was a -19.7% ± 3.6% decrease in tissue saturation index in the ischemic preconditioning trial, relative to placebo. During exercise, there was a 5.4% ± 4.8% greater maintenance of tissue saturation index in the ischemic preconditioning trial, relative to placebo. There were no substantial differences between trials for blood lactate, electromyography (EMG) median frequency, oxygen uptake, or rating of perceived exertion (RPE) at any time points.
  
  
  CONCLUSIONS
  Ischemic preconditioning improved peak and mean power output during the early stages of repeated sprint cycling and may be beneficial for sprint sports.
authors.affiliation: School of Sport, Health and Applied Science, St Mary's University, Strawberry Hill, Twickenham, UNITED KINGDOM.
authors.forename: Stephen D
authors.initials: SD
authors.lastname: Patterson
authors.forename: Neil E
authors.initials: NE
authors.lastname: Bezodis
authors.forename: Mark
authors.initials: M
authors.lastname: Glaister
authors.forename: John R
authors.initials: JR
authors.lastname: Pattison
mesh_terms: D000328:Adult; D054874:Athletic Performance; D001642:Bicycling / Q000502:physiology*; D006801:Humans; D019194:Ischemic Preconditioning; D008297:Male; D005082:Physical Exertion / Q000502:physiology*; D011795:Surveys and Questionnaires; D055815:Young Adult