Running

Question 1

Running Compared to Walking

Answer 1

• double float period
• narrower base of support
• increased motion (knee)
• increased muscle activity
• GRF 2.5-3 x BW
• Reduced stance time 0.2sec

Question 2

GRF in running

Answer 2

-2.5-3 x BW

Question 3

Stance time Running

Answer 3

0.2 seconds

Question 4

Stance Time Walking

Answer 4

0.6 seconds

Question 5

Swing phase is _____% of cycle in running

Answer 5

-70%

Question 6

Stance Phase is _____ % of Cycle in running

Answer 6

30%

Question 7

Contact Phase Components

Answer 7

• heel strike
• midfoot
• forefoot

Question 8

During Contact Phase

Answer 8

• rigid foot
• foot slightly ahead
• knee flexed (20*)

Question 9

Contact Phase:

Mid-Support Phase

Answer 9

• foot pronated
• hip/knee flexion, IR
• knee 30-40* flexed
• dorsiflexion 10-20*

Question 10

Contact Phase:

Take-Off

Answer 10

• foot supinated
• great toe ext
• triple extension

Question 11

Triple Extension

Answer 11

• ext hip, knee, PF ankle

- propulsion

Question 12

Windlass Mechanism

Answer 12

• plantar fascia tighter with MTP extension

- raises arch

Question 13

Swing Phase Components

Answer 13

• follow through
• forward swing
• Foot descent

Question 14

Swing:

Follow Through

Answer 14

• end of backward momentum

- hip extension (result of push off)

Question 15

Swing:

Forward Swing

Answer 15

• limb drives forward
• triple flexion (hip, knee, DF)
• hip flexion 45-60*

Question 16

Swing:

Foot Descent

Answer 16

• deceleration

- limb prepares for foot strike

Question 17

Swing:

Foot Descent

Answer 17

• deceleration

- limb prepares for foot strike

Question 18

Video Analysis

Answer 18

• 3-D is gold standard
• kinematic data
• 2-D

Question 19

Advantages of 2-D

Answer 19

• quick
• slow motion/freeze frame
• measurements
• play-back to runner