CHS 371 Exam 2-Running

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CHS 371 Exam 2-Running
2013-03-13 15:42:01

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  1. Running
    To go quickly by moving legs more rapidly than at a walk and in such a manner that for an instant in each step all or both feet are off the ground
  2. Running vs walking
    • more balance
    • more muscle strength
    • more force absorbed through joints
    • more ROM
    • more energy/burns more calories
  3. Running swing and stance phase
    • stance: 30%
    • swing: 70%
  4. Running stages of stance phase
    • foot strike
    • midstance/midsupport
    • take off
  5. Running stages of swing phase
    • Follow through
    • forward swing
    • double swing/float
    • foot descend
  6. Specific to running
    • stride and step length increases
    • frequency of steps increases
    • speed increases, time decreases,swing time increases
  7. NOTE: stride length increases with speed
  8. Cadence
    frequency of steps

    rate at which a person walks, steps/min

    aka turnover

    • walking = 50-60 steps/min
    • running=170-200 steps/min
  9. More speed
    as speed increases swing phase percentage increases

    • less and less stance time
    • more float time
  10. Base of support
    • walking:
    • shoulder width
    • double support

    • running:
    • narrow
    • both feet on one line
    • double swing
  11. Double Swing
    also called float
  12. ROM walking vs running (flexion)
    running requires more ROM

    Hip Flexion walking at initial contact = 30*

    Hip flexion running at initial contact/foot strike = 50*
  13. ROM walking vs running (extension)
    Hip extension walking at push off: 10*

    his extension running at follow through: 50* (max hip extension)
  14. Knee ROM
    walking: 60* flexion at forward swing

    running: 125* flexion at forward swing
  15. Ankle ROM
    walking: 10* ankle dorsiflexion at midstance

    running 30-40* ankle dorsiflexion at midstance/midsupport
  16. Gender differences in hip kinematics
    • females: greater hip IR and hip flexion
    • hip strength weakness in sagittal plane, resulting in control strategies in other transverse and frontal planes.

    males: better at engaging hip extensors
  17. incidence and determinants of lower extremity running injuries in long distance runners
  18. Larger risk factor being female
    • small risk factors:
    • prior injury
    • no breaks from running
    • hip injuries:females
    • calf and hamstring injuries: males