title: Changes in human muscle oxygen saturation and mean fiber conduction velocity during intense dynamic exercise--effect of muscular training status.
abstract: BACKGROUND
  In this study we investigated whether an association exists between muscle fiber conduction velocity (MFCV) and local muscle oxygen saturation (StO(2)) in the superficial part of the latissimus dorsi muscle of runners and swimmers during exhaustive dynamic exercise.
  
  
  METHODS
  Participants performed arm cranking with increasing intensity until exhaustion.
  
  
  RESULTS
  Runners' MFCV was unchanged with increasing arm-cranking exercise intensity, but was higher (P < 0.05) than swimmers' MFCV at the same workload. Swimmers' MFCV increased (P < 0.05) with increasing exercise intensity and reached values at exhaustion similar to those of the runners. StO(2) was similar in swimmers and runners at rest and decreased with increasing exercise intensity. StO(2) was higher (P < 0.05) at the same workload in swimmers compared with runners. StO(2) and MFCV were significantly but very weakly correlated in both swimmers and runners.
  
  
  CONCLUSIONS
  No association exists between surface MFCV and StO(2) in either trained or untrained human skeletal muscle during exhaustive intense dynamic exercise.
authors.affiliation: Department of Exercise and Sport Sciences, University of Copenhagen, Universitetsparken 13, 2100 Copenhagen, Denmark.
authors.forename: Anders
authors.initials: A
authors.lastname: Kilen
authors.forename: Leonardo
authors.initials: L
authors.lastname: Gizzi
authors.forename: Bente Rona
authors.initials: BR
authors.lastname: Jensen
authors.forename: Dario
authors.initials: D
authors.lastname: Farina
authors.forename: Nikolai Baastrup
authors.initials: NB
authors.lastname: Nordsborg
mesh_terms: D000293:Adolescent; D000328:Adult; D004576:Electromyography / Q000379:methods; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D009119:Muscle Contraction / Q000502:physiology; D018485:Muscle Fibers, Skeletal / Q000378:metabolism* / Q000502:physiology; D018482:Muscle, Skeletal / Q000378:metabolism / Q000502:physiology; D010100:Oxygen / Q000378:metabolism* / Q000502:physiology; D012420:Running / Q000502:physiology*; D013550:Swimming / Q000502:physiology*; D055815:Young Adult
chemical_list: D010100:Oxygen