these boots were made for walkin ’ boots were made for walkin ’ the biomechanics of walking in a...
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![Page 1: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/1.jpg)
TheseBootsWereMadeforWalkin’
TheBiomechanicsofWalkinginaFractureBoot
Darlina Liu April21st,2016 BIOL438
![Page 2: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/2.jpg)
FractureBoot=WalkerBoot=CAMWalker
AdjustableInflation Non-inflated RangeofMotion(ROM)
![Page 3: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/3.jpg)
Treatmentfor…• AnkleSprain• StressFracture• DiabeticUlcers• Tendonitis• PlantarFasciitis• Andmore…
![Page 4: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/4.jpg)
WhyStudyThis?• Youwillwalkabout75,000milesinyourlifetime
![Page 5: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/5.jpg)
WhyStudyThis?•Peoplehaveinjuredthemselveswhilewearingaboot
![Page 6: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/6.jpg)
Question
•Howdoeswalkinginafracturebootdifferfromnormalwalking?• Isthefracturebooteffectiveincontrollinganklemotion?•Whataretheeffectsonthesupportingfoot?•Whatarethedifferencesinenergy?
![Page 7: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/7.jpg)
Walking
![Page 8: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/8.jpg)
Walking:StancePhase
![Page 9: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/9.jpg)
AnkleMovement
![Page 10: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/10.jpg)
BonesandMusclesInvolved
![Page 11: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/11.jpg)
Hypothesis
•Predictdecreasedanklerotationforbootfootandincreasedanklerotationforsupportingfootcomparedtonormalwalking
•Predictthatwalkinginfracturebootwillrequiregreaterenergyexpenditurecomparedtonormalwalking
![Page 12: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/12.jpg)
Methods• Filming:SonyCybershot RX10II• DataAnalysis:LoggerProandExcel
MediumLiteVectraWalkerBootfromBregg
![Page 13: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/13.jpg)
ResultsofVideoAnalysis
•AnkleAngle
•StrideLength•KineticEnergy•Velocity
•PotentialEnergy
![Page 14: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/14.jpg)
Video:WalkinginFractureBoot
![Page 15: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/15.jpg)
Video:NormalWalking
![Page 16: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/16.jpg)
AnkleAngleCalculation
![Page 17: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/17.jpg)
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0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
AnkleAn
gle(degrees)
Time(s)
LeftFootAnkleAngle:Bootvs.Normal
Boot Normal
![Page 18: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/18.jpg)
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0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
AnkleAn
gle(degrees)
Time(s)
LeftFootAnkleAngle:Bootvs.Normal
Boot Normal
![Page 19: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/19.jpg)
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0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
AnkleAn
gle(degrees)
Time(s)
RightFootAnkleAngle:Bootvs.Normal
Boot Normal
![Page 20: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/20.jpg)
Boot Normal
AVERAGE(degrees) Left* Right Left Right
MinAnkleAngle 81.1 91.1 78.1 88.2
MaxDorsiflexion 8.9 N/A 11.9 1.8
MaxAnkleAngle 97.6 120.6 107.4 113.0
MaxPlantarflexion 7.6 30.6 17.4 23.0
RangeofMotion 16.5 29.5 29.3 24.8
AnkleComparison
![Page 21: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/21.jpg)
StrideLength•distancecoveredbyinitialcontactofonefootandconsecutivecontactofsamefoot•2MPH=0.894m/s
Boot Normal#ofSteps 6 6
Timeelapsed (s) 4 5Total distancetravelled(m) 3.58 4.47Stridelength (m/step) 0.596 0.745
![Page 22: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/22.jpg)
KineticEnergy=½mv2
• WeightofBoot=1.2lbs =0.54kg• WeightofSneaker=0.4lbs =0.18kg
Boot: Left Normal:Left
Boot:Right Normal:Right
KineticEnergy(J)
1.053 0.325 0.248 0.208
![Page 23: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/23.jpg)
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Kine
ticEne
rgy(J)
Time(s)
KineticEnergyComparisonbetweenBootLegandNormalLeg(Left)
Boot Normal
![Page 24: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/24.jpg)
0
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0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
Kine
ticEne
rgy(J)
Time(s)
KineticEnergyComparionbetweenSupportingLegandNormalLeg(Right)
Boot Normal
![Page 25: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/25.jpg)
PotentialEnergy=mgh• WeightofBoot=1.2lbs =0.54kg• WeightofSneaker=0.4lbs =0.18kg• g=9.81m/s2
Boot(Left) Normal(Left)
MaximumHeight(m) 0.233 0.324
PotentialEnergy(J) 1.243 0.577
![Page 26: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/26.jpg)
Conclusions& Implications
• Fracturebootdoesstabilizeanklemotionbutitisnotperfect• Thesupportingfootdoesplayacompensatoryrole• Walkinginafracturebootrequiresmoreenergyexpenditure
➤ Rethinkouruseanddesignoffractureboots
![Page 27: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/27.jpg)
Limitations
•Noinjuryattimeoffilming• Limitednumberoftrials• Two-dimensionalvideoanalysis• Treadmilldifferentfromnaturalwalking
![Page 28: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/28.jpg)
NextSteps
•Camerafrommultipleangles•Forcepads•Varyspeedandduration•Examineprotonationoffoot•Analyzewalkinginothertypesofboots
![Page 29: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/29.jpg)
References• TheFrequencyofInjury,MechanismofInjury,andEpidemiologyofAnkleSprains(Garrick1977)• Walking,FootPain,andBiomechanics(http://footactive.co.uk/blog/255-walking-foot-pain-and-biomechanics)• BiomechanicsofFootStrikes&ApplicationsToRunningBarefootorinMinimalFootwear(http://www.barefootrunning.fas.harvard.edu/4BiomechanicsofFootStrike.html)• TheInfluenceofKneePositiononAnkleDorsiflexion(Baumbach etal2014)• Step&StrideLength(http://www.clinicalgaitanalysis.com/teach-in/step/)• WalkingandRunningonTreadmill:TheStandardCriteriaforKinematicStudies(Padulo etal2014)
![Page 30: These Boots Were Made for Walkin ’ Boots Were Made for Walkin ’ The Biomechanics of Walking in a Fracture Boot DarlinaLiu April 21st, 2016 BIOL 438 Fracture Boot = Walker Boot](https://reader031.vdocument.in/reader031/viewer/2022020114/5b35ccaf7f8b9a3a6d8d8329/html5/thumbnails/30.jpg)
Thankyou!Anyquestions?