title: Cycling Versus Uphill Walking: Impact on Locomotor Muscle Fatigue and Running Exercise.
abstract: OBJECTIVE
  To describe the effects of uphill walking versus cycling exercises on knee-extensor (KE) neuromuscular properties and subsequent running exercise.
  
  
  METHODS
  Nine athletes performed 4 different sessions (1 familiarization and 3 experimental sessions, visit 2-4). Visit 2 (cycling +10-km condition) consisted of the completion of 1-h cycling followed by a 10-km running time trial. Visit 3 consisted of the completion of 1-h uphill walking followed by a 10-km running exercise (RE). During the fourth visit, athletes only ran 10 km. Visits 3 and 4 were randomized. The uphill walking and cycling exercises were performed at the same intensity, and pacing of the RE was similar between conditions. Neuromuscular function of the KE was assessed before warm-up, after first exercise, and after RE. Heart rate and rating of perceived exertion (RPE) were recorded during all exercises.
  
  
  RESULTS
  RPE during RE was greater following the 1-h cycling and uphill walking exercises than during RE alone. KE force (-21%), twitch torque (-20%), doublet torque (-16%), and twitch rate of force development (-13%) significantly decreased following cycling exercise and not after uphill walking exercise. Postactivation potentiation was observed after uphill walking and RE. KE force-production capacity partially recovered after running in the cycling +10-km condition.
  
  
  CONCLUSIONS
  Uphill walking and running induced postactivation potentiation, limiting the decrease in KE force postexercise. Despite different alterations in force-production capacity induced by cycling and uphill walking, both exercises increased perception of effort during the subsequent RE.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Pageaux
authors.forename: Jean
authors.initials: J
authors.lastname: Theurel
authors.forename: Romuald
authors.initials: R
authors.lastname: Lepers
mesh_terms: D000328:Adult; D056352:Athletes; D001642:Bicycling / Q000502:physiology*; D005080:Exercise Test; D006339:Heart Rate; D006801:Humans; D007717:Knee / Q000502:physiology; D008297:Male; D018763:Muscle Fatigue; D018482:Muscle, Skeletal / Q000502:physiology*; D005082:Physical Exertion; D012420:Running / Q000502:physiology*; D019415:Torque; D016138:Walking / Q000502:physiology*; D055815:Young Adult
keywords: endurance performance; knee extensors; perceived exertion; perception of effort; triathlon