Association between maximal oxygen consumption and physical activity and sedentary lifestyle in metabolic syndrome. Usefulness of questionnaires

Introduction and objectives: To analyze whether variations in physical activity (PA) and sedentary behaviors are accompanied by differences in maximal oxygen consumption (VO2max). Methods: We conducted a prospective cross-sectional study of 243 participants (82 women), aged 65.0 +/- 4.9 years old, with metabolic syndrome and overweight/obesity who performed a maximal exercise test with expired gas analysis. PA was evaluated using subjective methods, the REGICOR and RAPA 1 self-reported questionnaires, and objective methods, the chair test and accelerometry. Sedentariness was analyzed with the Nurses' Health Study questionnaire and accelerometry. Results: VO2max was higher in participants who reported they adhered to the recommendations of the PA guidelines in the REGICOR questionnaire (21.3 +/- 4.6 vs 18.0 +/- 4.4 mL/kg/min; P < .001) and was 18% higher in those who reported more PA in the RAPA 1 questionnaire than the less active group (P < .001). The chair test (> 15 vs < 15 repetitions) also showed significant differences in VO2max (21.2 +/- 4.8 vs 18.7 +/- 4.5 ml/kg/min; P < .001). Correlations between PA variables and VO2max were significant but low (r: 0.2 to 0.4). Sedentary activities showed less relationship with VO2max. Conclusions: Participants with metabolic syndrome and overweight/obesity who reported adhering to PA recommendations achieved higher VO2max. The self-reported questionnaires and the chair test identified significant variations in VO2max. Sedentary activities do not appear to modify VO2max. (C) 2018 Published by Elsevier Espana, S.L.U. on behalf of Sociedad Espanola de Cardiologia.