title: Changes in metabolic and muscle damage indicators following a single bout of jump training on stair versus at level.
abstract: We hypothesized that stair-jump exercise would induce less muscle damage and greater acute metabolic responses than level-jumps.
  
  
  METHODS
  Trained males executed 100 unilateral jumps on stairs with one leg, and at level with the other leg, with two weeks hiatus. Maximal isometric voluntary torque (MVC) and rate of torque development (RTD)in the quadriceps, and unilateral vertical jump height (VJ) were determined in the trained leg at pre-exercise,immediately at post- (IP), 24 h and 48 h after exercise. Serum creatine kinase (CK) level and delayed onset muscle soreness (DOMS) were evaluated at pre-exercise, 24 h and 48 h. Acute lactate and heart rate responses were also measured.
  
  
  RESULTS
  Lactate and heart rate at IP increased similarly under the two conditions. CK was elevated and MVC was depressed while RTD and VJ remained unchanged at 24 h in both types of training. MVC recovered at 48 h only after stair-jump exercise. DOMS developed only after level-jumps. Except DOMS, no effects of condition were found in any other variables.
  
  
  CONCLUSIONS
  We conclude that vigorous stair-jump exercise highly stresses the aerobic and the anaerobic energy system, and it preserves power and rapid torque generating ability 24 h after exercise. Stair-jump could be one alternative exercise to prevent muscle soreness.
authors.affiliation: University of Pécs Institute of Physical Education and Sport Science Ifjúság útja 6 H-7624 Pécs Hungary.
authors.forename: Márk
authors.initials: M
authors.lastname: Váczi
authors.forename: E
authors.initials: E
authors.lastname: Tékus
authors.forename: M
authors.initials: M
authors.lastname: Kaj
authors.forename: T
authors.initials: T
authors.lastname: Kőszegi
authors.forename: M
authors.initials: M
authors.lastname: Ambrus
authors.forename: J
authors.initials: J
authors.lastname: Tollár
authors.forename: T
authors.initials: T
authors.lastname: Atlasz
authors.forename: K
authors.initials: K
authors.lastname: Szabadfi
authors.forename: I
authors.initials: I
authors.lastname: Karsai
mesh_terms: D003402:Creatine Kinase / Q000378:metabolism; D018592:Cross-Over Studies; D004734:Energy Metabolism / Q000502:physiology; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D007537:Isometric Contraction / Q000502:physiology*; D007719:Knee Joint / Q000502:physiology; D007866:Leg / Q000502:physiology; D008297:Male; D018763:Muscle Fatigue / Q000502:physiology; D018482:Muscle, Skeletal / Q000293:injuries* / Q000378:metabolism / Q000503:physiopathology; D063806:Myalgia / Q000378:metabolism / Q000503:physiopathology; D059385:Plyometric Exercise / Q000009:adverse effects* / Q000379:methods*; D055815:Young Adult
chemical_list: D003402:Creatine Kinase
keywords: creatine kinase; delayed onset muscle soreness; knee extensor; microinjury; plyometric training