title: Does aerobic exercise intensity affect health-related parameters in overweight women?
abstract: The aim of this study was to compare the effect of a cycling training programme performed at intensity corresponding to the lowest value of the respiratory quotient (RQ) versus at intensity corresponding to the ventilatory threshold (VT), on body composition and health-related parameters in overweight women. Thirty-two sedentary obese women (27-42 years old) were studied in a randomized trial of either RQ (n = 17) or VT (n = 15). RQ and VT training sessions were equalized by time (60 min) and performed in a cycloergometer. Anthropometry, body composition, lipid profile, glucose, basal metabolic rate (BMR) and fitness (maximal oxygen uptake) were evaluated before and after 12 weeks of intervention. Body weight, body mass index, fatness and fitness were improved in both groups (P<0·001). Triglycerides (TG) levels decreased only in response to RQ (P<0·001) and fat-free mass (FFM) to VT (P = 0·002). No differences were observed between groups. Both exercise intensities seem to be effective for improving health in overweight women. However, low-intensity compared with the high-intensity exercise training appears to have additional benefits on TG levels and to maintenance of FFM.
authors.affiliation: Department of Human Movement Science, Federal University of São Paulo, Santos, São Paulo, Brazil.
authors.forename: João P
authors.initials: JP
authors.lastname: Botero
authors.forename: Wagner L
authors.initials: WL
authors.lastname: Prado
authors.forename: Ricardo L F
authors.initials: RL
authors.lastname: Guerra
authors.forename: Guilherme F F
authors.initials: GF
authors.lastname: Speretta
authors.forename: Richard D
authors.initials: RD
authors.lastname: Leite
authors.forename: Jonato
authors.initials: J
authors.lastname: Prestes
authors.forename: Adrián V
authors.initials: AV
authors.lastname: Sanz
authors.forename: Scott
authors.initials: S
authors.lastname: Lyons
authors.forename: Paulo H S M
authors.initials: PH
authors.lastname: de Azevedo
authors.forename: Vilmar
authors.initials: V
authors.lastname: Baldissera
authors.forename: Sergio E A
authors.initials: SE
authors.lastname: Perez
authors.forename: Ana
authors.initials: A
authors.lastname: Dâmaso
authors.forename: Rozinaldo G
authors.initials: RG
authors.lastname: da Silva
mesh_terms: D050154:Adiposity; D000328:Adult; D015308:Anaerobic Threshold; D001642:Bicycling; D015415:Biomarkers / Q000097:blood; D015992:Body Mass Index; D001938:Brazil; D004734:Energy Metabolism; D005081:Exercise Therapy / Q000379:methods*; D005260:Female; D006304:Health Status; D006801:Humans; D050177:Overweight / Q000097:blood / Q000175:diagnosis / Q000503:physiopathology / Q000628:therapy*; D010809:Physical Fitness; D057185:Sedentary Behavior; D013997:Time Factors; D016896:Treatment Outcome; D014280:Triglycerides / Q000097:blood; D015431:Weight Loss
chemical_list: D015415:Biomarkers; D014280:Triglycerides
keywords: exercise; obesity; respiratory quotient; ventilatory threshold; weight control