peeling back the layers of bike fit from sizing to
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Peeling back the layers of bike fit: from sizing to applied cycling biomechanics Andy Brooke BSc, MA, MRes, PhD candidate www.cyclologic.com www.ibfi certification.com EDUCATION Commercial interests and affiliations www.cyclologic.com www.ibfi

  1. Peeling back the layers of bike fit: from sizing to applied cycling biomechanics Andy Brooke BSc, MA, MRes, PhD candidate www.cyclologic.com www.ibfi ‐ certification.com

  2. EDUCATION Commercial interests and affiliations www.cyclologic.com www.ibfi ‐ certification.com

  3. Introduction • Bike fitting since 2010 • MRes in Sport and Exercise Science in 2012 • International Bike Fitting Institute started in 2014 • PhD in Cycling Biomechanics started in 2015 • Associate university lecturer 2019 • 16 bike fitting courses • 10 bike fitting conferences www.cyclologic.com www.ibfi ‐ certification.com

  4. Content • Bike sizing vs bike fitting • Basics of bike fitting • Advanced fitting and cycling analysis • The body or the bike • Future research www.cyclologic.com www.ibfi ‐ certification.com

  5. Bike Sizing vs Bike Fitting Bike sizing Bike fitting • identifies the right size of frame • identifies the right riding position • Ball park position • Exact position • bike fits, or it doesn’t • Often requires swapping parts • Can be formulaic • Should be individualised www.cyclologic.com www.ibfi ‐ certification.com

  6. Basics of fit – do no harm! • Cleat position Midfoot • Road neutral Forefoot • Neutral rotation/float • Saddle height • Not too low (potential knee issues) • Not too high (potential saddle discomfort) • Bar position • Too much reach can cause numb hands, Hindfoot neck/back issues • Too little reach can load saddle, create toppling, difficulty tucking out of the wind www.cyclologic.com www.ibfi ‐ certification.com

  7. Basics of fit – continued Midfoot Forefoot Recommended ranges (training wheels) • Ranges that work for 95% of people… • 8 variables (platarflexion, dorsiflexion, knee extension, knee flexion, hip extension, hip flexion, back angle, shoulder angle) Hindfoot • (0.95x0.95x0.95x0.95x0.95x0.95x0.95x0.95=0.66) www.cyclologic.com www.ibfi ‐ certification.com

  8. From basic to advanced ‐ critical reasoning • Conceptualise • Analyse • Question • Evaluate www.cyclologic.com www.ibfi ‐ certification.com

  9. Chain of evidence • Interview • Physical assessment • On ‐ bike assessment www.cyclologic.com www.ibfi ‐ certification.com

  10. Supporting evidence 3 – On ‐ bike 1 – pre ‐ fit 2 ‐ PA Knee pain • No other sport/exercise or off ‐ • the ‐ bike work Visually less ‐ developed gluteal • muscles www.cyclologic.com www.ibfi ‐ certification.com

  11. Hypothesizing • Form a hypothesis based on the information available • Test the hypotheses • Bike interventions aren’t permanent! • Trial and error • Reassess and change if necessary www.cyclologic.com www.ibfi ‐ certification.com

  12. The body or the bike? a) Bike only b) Body only c) Bike then body d) Body then bike www.cyclologic.com www.ibfi ‐ certification.com

  13. Bike fit layers – ankling 1 • Basic – toe up/toe down • Absolute position www.cyclologic.com www.ibfi ‐ certification.com

  14. Bike fit layers – ankling 2 • Plantarflexion/dorsiflexion • Terminology • Direction of movement • Ankle as absorber of force when shifting towards DF under load www.cyclologic.com www.ibfi ‐ certification.com

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