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AnalysisofExercisewithBigDataBrendonJosephson,JakePortanova,YuanJiang
FacultyAdvisors:IanDuncan,JanetDuncan;StatisticalAdvisor:WadeHerndonDept.ofStatisticsandAppliedProbability,UniversityofCaliforniaSantaBarbara
v Datav Datafrom2012-2015(Source:Vitality)v Longitudinaldatasetconsistingofpeoplewho
consistentlyreporteddatatotheVitalityprogrambetween2013and2015
v 8,519observationsv Variables
v EightHealthrelatedoutcomevariablesv BodyMassIndex(BMI)v Glucosev HighDensityLipoproteins (HDL)v LowDensityLipoproteins (LDL)v TotalCholesterol (TC)v Triglyceridesv SBPv DBP
v VerifiedWorkoutMetricsv LightVerifiedWorkouts (LVW):15minat60%maxheart
ratev StandardVerifiedWorkouts (SVW):30minat60%max
heartratev TotalVerifiedWorkouts (TVW)=LVW+SVW
v Changevariablescreatedforeachoftheresponsevariablesandworkout categories
v Modelsv Selection/ExploratoryAnalysis
v ANOVAtestswereusedtodecidewhichresponsevariablesaremostsignificantlycorrelatedwithhealth
v Collinearity:CheckedthecorrelationbetweenLVWandSVWtopreventinaccuratefinalmodels
v Establishedwhatbaselinedatawasrelevanttothemodel
v FinalModelsv UsedlinearmodelsinRtopredictthechangeinour
LVW,SVW,andTVWtothechangeinoureightresponsevariables
v Created72modelsv (8responsevariables)x(3years)x(3workout
types)
Methods
v Motivationv ForsubstantialhealthbenefitsTheOfficeofDisease
PreventionandHealthPromotion (ODPHP)recommends1v 150minutesofmoderate-intensityphysicalactivityv 75minutesofvigorous-intensityphysicalactivity
v UniversityofKansasstudyonexerciseandweightlossconcluded2:
v Aerobicexercisealoneresultsinclinicallysignificantweightlossforbothmenandwomen
v ThereisnostatisticallysignificantdifferenceinBMIreductionbetween400calorieworkouts and600calorieworkouts
v 11.1%ofUShealthcareexpenditurehasbeenassociatedwith inadequatephysicalactivity3
v StudyGoalsv ExaminetheeffectsofchangesinFitBit verifieddata(light
andstandardworkouts) onchangesinhealthoutcomesv Exploretheeffectofchangingworkouthabitsdepending
onpreviousworkout habitsv Analyzetheeffectsofprovidingaworkout incentive
program(i.e.Vitality)
v IncreasingtheamountofverifiedworkoutscausesfavorableoutcomesforBMI,triglycerides,andtotalcholesterol,butnototherhealthmeasures.
v FavorablehealtheffectsareattributedtoanincreaseinSVWs,whilethereislittleevidencethatLVWshaveanyimpact.v TVWarehighlycorrelatedwithSVWbutnotLVW.
v HDLisonlysignificantinthetwoyearstudyhintingtowardsthefactthata changeinHDLmayrequirelongtermchangestoone’sphysicalactivityhabits.
v USDepartmentofHealthandHumanServices.2008physicalactivityguidelines forAmericans.2008.
v Kokkinos, Peter.“PhysicalActivity,HealthBenefits,andMortalityRisk.” ISRNCardiology 2012(2012):718789. PMC.Web.1Mar.2016.
v Donnelly, JosephE.etal.“AerobicExerciseAloneResultsinClinicallySignificantWeightLossforMenandWomen:MidwestExerciseTrial-2.”Obesity(SilverSpring,Md.) 21.3(2013):E219–E228. PMC.Web.1Mar.2016.
v SummaryStatisticsv MeanVerifiedWorkouts byCategory
v MeanandStandardDeviationoftheChangeVariables
v VariableRelationshipsv PhysicalActivityStratifiedbyGender
v Model
v TheRegressionresultsweremostmostsignificantinBMIandTriglycerides(resultsintablebelow)
v CoefficientsforImprovementinTVWthroughoutthestudy
v T-TestsforIncrease/DecreaseinImprovement
Introduction
Discussion/Conclusion
WorksCited[Selected]
Results
2013-2014 2014-2015 2013-2015Mean SD Mean SD Mean SD
BMI 0.00 1.93 0.00 2.00 0.00 2.34HDL 0.02 0.28 0.02 0.28 0.03 0.27TC 0.01 0.68 0.02 0.66 0.02 0.84TRI 0.02 0.74 0.03 0.72 0.03 0.82LVW 0.00 4.11 0.00 3.95 0.00 2.75SVW 0.00 5.40 0.00 4.93 0.00 3.47TVW 0.00 6.99 0.00 6.29 0.00 4.40
Age 18-25(172) 26-50(5311) 50+(2613) Total
YearM(73)
F(99)
M(2465)
F(2946)
M(1033)
F(1580) (8519)
LVW2013 1.46 1.23 1.99 2.46 2.37 2.95 2.402014 2.93 2.49 3.38 4.00 3.56 4.34 3.812015 4.03 3.59 4.22 4.84 4.13 5.05 4.61
SVW2013 4.38 2.70 5.32 4.13 6.21 4.47 4.822014 6.38 4.00 7.43 5.51 8.38 5.79 6.522015 7.76 5.10 8.52 6.30 9.53 6.58 7.45
TVW SVW LVW
Year 13-14 14-15 13-15 13-14 14-15 13-15 13-14 14-15 13-15
BMI
TC
HDL
TRI
BMIandTRIRegressionOutputBMIChange TRIChange
Coef Lower Upper Coef Lower UpperConstant 2.12 1.87 2.36 0.46 0.43 0.50BMI(2013) -0.06 -0.07 -0.05 0.00TRI(2013) -0.30 -0.31 -0.28TVW(2013) 0.04 -0.03 0.10 -0.01 -0.03 0.02
TVWImprove -0.27 -0.34 -0.20 -0.06 -0.08 -0.03
Note:redvaluesaresignificant
2013-2014 2014-2015 2013-2015
HDL 0.001 0.002 0.009
TC -0.030 -0.039 -0.056Note:redvaluesaresignificant