Metabolic EquivalentMotor ActivityExercisePublic FacilitiesExercise TestLeisure ActivitiesPhysical FitnessRecreationExercise ToleranceEnergy MetabolismSedentary LifestyleWalkingAccelerometryMonitoring, AmbulatoryBody Mass IndexOxygen ConsumptionQuestionnairesPhysical ExertionExercise TherapyLife StyleProspective StudiesRisk FactorsHeart RateFollow-Up StudiesProportional Hazards ModelsObesityCross-Sectional StudiesElectrocardiographyTime FactorsCardiovascular DiseasesHealth BehaviorCohort StudiesRegression AnalysisReproducibility of ResultsPredictive Value of TestsActivities of Daily LivingMultivariate AnalysisUnited StatesSex FactorsRisk AssessmentBlood PressureAge FactorsLongitudinal StudiesIncidence