Over-pronation

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Over-pronation is a very common condition affecting millions of people of all ages. View this presentation to learn more about this condition and its cure.

For more information visit www.HyProCure.com.

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Over-pronation

  1. 1. What is over-pronation
  2. 2. We needto learn aboutpronation.
  3. 3. Pronation is a normal motion of the foot during walking or running.
  4. 4. Pronation Helps to absorb the normal forces travelingfrom the body aboveto the ground below.
  5. 5. Specifically The ankle bone slightly turns inward and the rest of the footturns slightly outward.
  6. 6. Ankle bone (talus)controls the motions of the hindfoot (calcaneus/navicular)
  7. 7. Let’s get more technicalDuring pronation Talus- slightly moves  Toward the mid-line of the body (medially)- transverse plane  The inner side (medial) lifts up-ward and the outer side (lateral) slightly drops downward- Inverts- frontal plane  Front of the talus slightly dips – sagittal plane
  8. 8. The mid-footcontrols the motions ofthe forefoot.
  9. 9. Therefore:the talus ultimately controls the motions of the rest of the foot.
  10. 10. The foot movesin the oppositedirection of the talus during walking.
  11. 11. Foot has to move in all three planes topronate Slightly turns away from the mid-line of the body – lateral (abduction) transverse plane motion Sole of the foot slightly turns outward (everts) frontal plane Foot turns slightly up-wards (dorsiflexes) sagittal plane.
  12. 12. PronationAlso allows for adaptation while walking on uneven surfaces.
  13. 13. The motions of the foot when walking. Pronation and Supination
  14. 14. What is supination?
  15. 15. Supinated Foot Over-Pronated Foot
  16. 16. Supination - Pronation• Opposite movements between the ankle bone and the foot.• Think of it as a winding and unwinding of the foot mechanism.• A period of stability and less stability of the foot structures while walking.
  17. 17. Pronation & supination are veryimportant motions of the foot during the walking cycle.
  18. 18. These complex motions of the footconsist of a lockingand unlocking of the joints within the foot.
  19. 19. Pronation unlocks the foot and turns it into a “Loose bag of bones”We have to be very careful using this termwhen describing the stability of the bones ofthe foot during pronation as it seems like thereis no stability within the foot during this period.This is not the case, it is just that there is aperiod of slight joint motion as the foot isallowed to be a mobile adapter.
  20. 20. Mobile AdapterThis is a very important aspect of the foot to allowslight accommodation to an uneven weightbearingsurface below the foot.During this time there is a normal amount ofadaptation that is acceptable and built into themechanics of the foot.
  21. 21. What controls how much pronation or supination occurs in the foot?
  22. 22. It is determined by the motion of theankle bone (talus) on two hindfoot bones (calcaneus-heel bone and navicular).
  23. 23. There is a specific point when the foot needs to be supinating.
  24. 24. During the contact phase of walking the hindfoot lands supinated,quickly pronates, and re-supinates for toe-off.
  25. 25. At mid-stance the foot transitions from itssupinated motion into a pronating motion.
  26. 26. Finally, in order for the foot to function as it was designed, the hindfoot must stiffen/limit joint motion and transitionback into supination in order to prepare the foot for lift-off.
  27. 27. So what isover-pronation/hyperpronation?
  28. 28. Over-pronation simply meanstoo much pronation.
  29. 29. In other words it means an extendedamount/duration of pronation.
  30. 30. When the foot is supposed to be in a supinated/locked state, it is in it’s pronated/weakened lax state.
  31. 31. This means the secondary support structures (ligaments/tendons/fascia) are going to have anincreased strain to lift the foot.
  32. 32. However, medically, it ismore appropriate to use: hyperpronation.
  33. 33. Hyper- means excessive or too much.
  34. 34. Think of the wordshypertension (high blood pressure)hyperglycemia (high blood sugar)
  35. 35. We don’t say over-tension orover-glycemia.
  36. 36. How does the foot end up with too much or a prolonged amount of pronation?
  37. 37. Hind-foot stability has everything to do with the stability of the ankle bone on the hindfoot bones called the TaloTarsal Mechanism.
  38. 38. TaloTarsal Mechanism• 3 bones – Talus (ankle bone) – Calcaneus (heel bone) – Navicular (bone in front of the talus)• This mechanism has the most complex motion of the body.
  39. 39. Talus sits on top of the back of the foot. 4 specific joints 4 between the talus 3 and the calcaneus 2 and navicular bones. 1
  40. 40. TaloTarsal MotionThere is a specific amount of motion that issupposed to occur between the talus on thehindfoot bones.
  41. 41. Normally, there should be twice the amountof supination compared to the amount of pronation.
  42. 42. Why is over-pronation orhyperpronation a bad thing.
  43. 43. As the saying goes, too much of anything is usually not a good thing.
  44. 44. A prolonged or excessive amount of foot pronation means there isinstability of the ankle bone on the hindfoot bones.
  45. 45. This leads to excessive forces acting on the structures of the foot. Specifically, there are increased strains placed oncertain ligaments and tendons of the foot.
  46. 46. A few conditions blamed on anexcessive amount of foot pronation. • Bunions • Hammertoes • Posterior tibial tendon dysfunction • Plantar fasciitis/heel pain • Tarsal tunnel syndrome
  47. 47. And thenthere is the rest of the body.
  48. 48. Does over-pronation only happen in a low arched or “flat” foot?
  49. 49. Answer In most cases there is a lower than normal arch of the foot. HOWEVERWhat determines a low or high arch is the inclination of the heel bone.
  50. 50. It is possible to have a high arched foot and still have hyperpronation? YES
  51. 51. Over-pronation is a result of the talus partially displacing off its normalposition on top of the heel bone.
  52. 52. The angle of the heel has little to do with thedisplacement of the talus.
  53. 53. The bottomof the foot is not the cause ofover-pronation.
  54. 54. How can we fix over-pronation?
  55. 55. To fix something you have to eliminate the cause.
  56. 56. Abnormal closure of the sinus tarsi.
  57. 57. Internally Stabilized with HyProCure ®
  58. 58. Abnormal – Talar 2nd Metatarsal Angle > 16.
  59. 59. Fixed internally with HyProCure . ®
  60. 60. “Changing Lives, One Step at a Time”To learn more please visit: www.hyprocure.com

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