title: Effect of creatine ingestion on glucose tolerance and insulin sensitivity in men.
abstract: OBJECTIVE
  This study investigated whether acute (5 d) and/or short-term (28 d) creatine (Cr) ingestion altered glucose tolerance or insulin action in healthy, untrained men (aged 26.9 +/- 5.7 yr; SD).
  
  
  METHODS
  Subjects were randomly allocated to either a Cr ( N= 8) or placebo group (N = 9) and were tested in the control condition (presupplementation), and after 5 and a further 28 d of supplementation. The Cr group ingested 20 g and 3 g.d (-1) of Cr for the first 5 and following 28 d, respectively. The placebo group ingested similar amounts of glucose over the same time period. During each testing period, subjects underwent an oral glucose tolerance test (OGTT) to determine insulin sensitivity, and six subjects from each group underwent a muscle biopsy before each OGTT.
  
  
  RESULTS
  Cr supplementation resulted in an increased (P< 0.05) muscle TCr content after both the acute and short-term loading phase compared with placebo. Neither acute nor short-term Cr supplementation influenced skeletal muscle glycogen content, glucose tolerance, or measures of insulin sensitivity.
  
  
  CONCLUSIONS
  These findings demonstrated that acute Cr supplementation (20 g.d(-1) for 5 d) followed by short-term Cr supplementation (3 g.d(-1) for 28 d) did not alter insulin action in healthy, active untrained men.
authors.affiliation: School of Health Science, Deakin University, Burwood, Australia.
authors.forename: Jackie E N
authors.initials: JE
authors.lastname: Newman
authors.forename: Mark
authors.initials: M
authors.lastname: Hargreaves
authors.forename: Andrew
authors.initials: A
authors.lastname: Garnham
authors.forename: Rodney J
authors.initials: RJ
authors.lastname: Snow
mesh_terms: D001786:Blood Glucose / Q000032:analysis*; D003401:Creatine / Q000008:administration & dosage / Q000494:pharmacology*; D019587:Dietary Supplements; D005951:Glucose Tolerance Test; D006801:Humans; D007328:Insulin / Q000097:blood*; D008297:Male
chemical_list: D001786:Blood Glucose; D007328:Insulin; D003401:Creatine