title: Ergogenic effect of varied doses of coffee-caffeine on maximal aerobic power of young African subjects.
abstract: BACKGROUND
  Caffeine one of the readily available stimulants consumed daily by more than 80% of the world's population, making it the most widely consumed drug in history. The objective of this study was to determine the effects of different doses (5, 10 &15 mg.kg(-1)) of caffeine per kilogram body weight on maximal aerobic power of normal young black African (Nigerian) male adults.
  
  
  METHODS
  Twenty apparently healthy young male adults volunteers, participated. A repeated measure four randomized crossover (counter balanced) double blind design was used in data collection. Subjects engaged in 20 meter shuttle run test (20 MST) one hour post caffeine (5, 10 & 15 mg.kg(-1)) and placebo doses ingestion. Endurance performance index (VO(2) max, run time & number of exercise laps) were measured and recorded.
  
  
  RESULTS
  Repeated measures ANOVA was used to assess the level of significant difference between caffeine doses and placebo dose in VO(2) max, run time and number of exercise laps. The result showed no significant effect of caffeine doses over placebo dose.
  
  
  CONCLUSIONS
  It was concluded that caffeine dose of up to 15mg/kg seems not to have any ergogenic effect on maximum aerobic power of young black African male adults.
authors.affiliation: Department of Medical Rehabilitation, Faculty of Health Sciences and Technology, University of Nigeria, Enugu Campus, Nigeria. siklam_86@yahoo.co.uk
authors.forename: Sikiru
authors.initials: S
authors.lastname: Lamina
authors.forename: D I
authors.initials: DI
authors.lastname: Musa
mesh_terms: D000284:Administration, Oral; D000293:Adolescent; D000704:Analysis of Variance; D044383:Black People; D002110:Caffeine / Q000008:administration & dosage* / Q000494:pharmacology; D000697:Central Nervous System Stimulants / Q000008:administration & dosage* / Q000494:pharmacology; D018592:Cross-Over Studies; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D016552:Ergometry; D005080:Exercise Test; D006801:Humans; D008297:Male; D009549:Nigeria; D010101:Oxygen Consumption / Q000502:physiology; D010807:Physical Endurance / Q000187:drug effects* / Q000502:physiology; D012420:Running / Q000502:physiology; D055815:Young Adult
chemical_list: D000697:Central Nervous System Stimulants; D002110:Caffeine