CHS 371 Exam 2-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

• more balance
• more muscle strength
• more force absorbed through joints
• more ROM
• more energy/burns more calories

• stance: 30%
• swing: 70%

• foot strike
• midstance/midsupport
• take off

• Follow through
• forward swing
• double swing/float
• foot descend

• stride and step length increases
• frequency of steps increases
• speed increases, time decreases,swing time increases

frequency of steps

rate at which a person walks, steps/min

aka turnover

• walking = 50-60 steps/min
• running=170-200 steps/min

as speed increases swing phase percentage increases

• less and less stance time
• more float time

• walking:
• shoulder width
• double support

• running:
• narrow
• both feet on one line
• double swing

also called float

running requires more ROM

Hip Flexion walking at initial contact = 30*

Hip flexion running at initial contact/foot strike = 50*

Hip extension walking at push off: 10*

his extension running at follow through: 50* (max hip extension)

walking: 60* flexion at forward swing

running: 125* flexion at forward swing

walking: 10* ankle dorsiflexion at midstance

running 30-40* ankle dorsiflexion at midstance/midsupport

• 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

• small risk factors:
• prior injury
• no breaks from running
• hip injuries:females
• calf and hamstring injuries: males