title: Correlation of heart rate at lactate minimum and maximal lactate steady state in wheelchair-racing athletes.
abstract: METHODS
  Prospective, experimental study.
  
  
  OBJECTIVE
  To investigate whether the heart rate (HR) at lactate minimum (LMHR)determined by means of a HR-guided lactate minimum test (LMT) corresponds to the HR at maximal lactate steady state (MLSS) in wheelchair-racing athletes.
  
  
  METHODS
  Institute of Sports Medicine.
  
  
  METHODS
  Eight well-trained wheelchair-racing athletes (mean age: 33±12 years; height: 169±12 cm; body mass: 59±11 kg; VO(2peak): 2.76±0.73 l min(-1)) completed a HR-guided LMT on a treadmill in their own racing wheelchair. Subsequently, exercise intensity at MLSS and corresponding HR were determined by means of several endurance tests on different days.
  
  
  RESULTS
  All measured parameters (HR, speed, blood lactate, oxygen consumption and rating of perceived exertion) revealed significantly higher values at MLSS compared with values at lactate minimum (LM). However, there were highly significant correlations (r=0.914, P=0.002) between LMHR and HR at MLSS (163±6 versus 172±7 b.p.m.) as well as for speed (r=0.935, P=0.001) and blood lactate (r=0.944, P<0.001) at LM versus MLSS. The correlation for oxygen consumption (r=0.798, P=0.018) at LM versus MLSS was lower yet significant.
  
  
  CONCLUSIONS
  There exists a close relationship between LMHR and HR at MLSS in wheelchair racing. This allows the prediction of MLSS based on a single exercise test in this special group of athletes. For practical use during daily training, routine HR at MLSS can be assumed to be 8-9 b.p.m. above the LMHRin wheelchair-racing athletes.
authors: Institute of Sports Medicine, Swiss Paraplegic Centre, Nottwil, Switzerland. claudio.perret@paranet.ch
authors: C
authors: C
authors: Perret
authors: R
authors: R
authors: Labruyère
authors: G
authors: G
authors: Mueller
authors: M
authors: M
authors: Strupler
mesh_terms: D000293:Adolescent; D000328:Adult; D054874:Athletic Performance / Q000502:physiology*; D005080:Exercise Test / Q000379:methods / Q000592:standards; D017079:Exercise Tolerance / Q000502:physiology*; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D019344:Lactic Acid / Q000097:blood*; D008297:Male; D008875:Middle Aged; D018482:Muscle, Skeletal / Q000378:metabolism; D010264:Paraplegia / Q000378:metabolism / Q000503:physiopathology* / Q000534:rehabilitation; D010809:Physical Fitness / Q000502:physiology*; D011446:Prospective Studies; D014910:Wheelchairs; D055815:Young Adult
chemical_list: D019344:Lactic Acid