title: Effect of protein quality on recovery after intense resistance training.
abstract: OBJECTIVE
  The present study investigated the effects of high- versus low-quality protein supplementation on the regain of exercise performance during recovery from a period of high-intensity resistance training.
  
  
  METHODS
  In a diet-controlled crossover study, 12 resistance-trained participants performed two identical training periods, with each training period including four sessions of high-intensity resistance exercise during 5 days, while receiving either high- or low-quality protein. Prior to and at 3, 24 and 48 h after the training periods, performance was evaluated in knee extensor and flexor isometric maximal voluntary contraction (MVC), counter-movement jumping height (CMJ), and peak and mean anaerobic power. In addition, prior to and at 48 h after the training periods, performance in time-to-exhaustion at 70 % of VO2max(TTE) was evaluated.
  
  
  RESULTS
  After the intense training periods, decrements in the order of 4-24 % were observed for MVCext, CMJ, mean anaerobic power, and TTE. In particular for TTE, this decrement in exercise performance did not attain full recovery at 48 h post-exercise. The regain of exercise performance was not dictated by type of protein supplement.
  
  
  CONCLUSIONS
  The regain of muscle strength as well as anaerobic or aerobic performances were not markedly influenced by the type of protein supplement.
authors.affiliation: Section for Sports Science, Department of Public Health, Aarhus University, Aarhus, Denmark.
authors.forename: E
authors.initials: E
authors.lastname: Rindom
authors.affiliation: Section for Sports Science, Department of Public Health, Aarhus University, Aarhus, Denmark.
authors.forename: M H
authors.initials: MH
authors.lastname: Nielsen
authors.affiliation: Section for Sports Science, Department of Public Health, Aarhus University, Aarhus, Denmark.
authors.forename: K
authors.initials: K
authors.lastname: Kececi
authors.affiliation: Section for Sports Science, Department of Public Health, Aarhus University, Aarhus, Denmark.
authors.forename: M E
authors.initials: ME
authors.lastname: Jensen
authors.affiliation: Section for Sports Science, Department of Public Health, Aarhus University, Aarhus, Denmark.
authors.forename: K
authors.initials: K
authors.lastname: Vissing
authors.affiliation: Section for Sports Science, Department of Public Health, Aarhus University, Aarhus, Denmark. jean@clin.au.dk.|Research Laboratory for Biochemical Pathology, Department of Clinical Medicine, Aarhus University, Nørrebrogade 44, bldg. 3, 8000, Aarhus C, Denmark. jean@clin.au.dk.
authors.forename: J
authors.initials: J
authors.lastname: Farup
mesh_terms: D000284:Administration, Oral; D004044:Dietary Proteins / Q000008:administration & dosage / Q000378:metabolism*; D000072696:High-Intensity Interval Training / Q000379:methods*; D006801:Humans; D008297:Male; D009124:Muscle Proteins; D053580:Muscle Strength / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology*; D010807:Physical Endurance / Q000502:physiology*; D020127:Recovery of Function / Q000502:physiology; D055070:Resistance Training / Q000379:methods*; D016037:Single-Blind Method; D055815:Young Adult
chemical_list: D004044:Dietary Proteins; D009124:Muscle Proteins
keywords: Athletic performance; Collagen protein; Humans; Protein quality; Strength training; Whey protein