title: Influence of central obesity in estimating maximal oxygen uptake.
abstract: To assess the influence of central obesity on the magnitude of the error of estimate of maximal oxygen uptake in maximal cycling exercise testing.
  A total of 1,715 adults (68% men) between 18-91 years of age underwent cardiopulmonary exercise testing using a progressive protocol to volitional fatigue. Subjects were stratified by central obesity into three quartile ranges: Q1, Q2-3 and Q4. Maximal oxygen uptake [mL.(kg.min)-1] was estimated by the attained maximal workload and body weight using gender- and population-specific equations. The error of estimate [mL.(kg.min)-1] and percent error between measured and estimated maximal oxygen uptake values were compared among obesity quartile ranges.
  The error of estimate and percent error differed (mean ± SD) for men (Q1=1.3±3.7 and 2.0±10.4; Q2-3=0.5±3.1 and -0.5±13.0; and Q4=-0.3±2.8 and -4.5±15.8 (p<0.05)) and for women (Q1=1.6±3.3 and 3.6±10.2; Q2-3=0.4±2.7 and -0.4±11.8; and Q4=-0.9±2.3 and -10.0±22.7 (p<0.05)).
  Central obesity directly influences the magnitude of the error of estimate of maximal oxygen uptake and should be considered when direct expired gas analysis is unavailable.
authors.affiliation: Federal University of Rio de Janeiro, Heart Institute Edson Saad and Medical School, Rio de Janeiro/RJ, Brazil.|Exercise Medicine Clinic - CLINIMEX, Rio de Janeiro/RJ, Brazil.
authors.forename: Christina Grüne
authors.initials: CG
authors.lastname: de Souza E Silva
authors.affiliation: William Beaumont Hospital, Preventive Cardiology and Cardiac Rehabilitation, Royal Oak, MI, USA.
authors.forename: Barry A
authors.initials: BA
authors.lastname: Franklin
authors.affiliation: Federal University of Rio de Janeiro, Heart Institute Edson Saad and Medical School, Rio de Janeiro/RJ, Brazil.|Exercise Medicine Clinic - CLINIMEX, Rio de Janeiro/RJ, Brazil.
authors.forename: Claudio Gil Soares
authors.initials: CG
authors.lastname: de Araújo
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001827:Body Height; D001835:Body Weight; D002318:Cardiovascular Diseases / Q000209:etiology; D005080:Exercise Test; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000503:physiopathology*; D010101:Oxygen Consumption / Q000502:physiology*; D012123:Pulmonary Ventilation / Q000502:physiology*; D065927:Waist-Height Ratio; D055815:Young Adult