Quiz 3.7

Question 1

When does walk become run

Answer 1

~4.5 mph (2 m/s) because it is hard to move safely through gait cycle at this speed

Question 2

Limitations of walking

Answer 2

Both feet are in contact with the ground at the same time and this becomes hard at increasing velocities

Question 3

How do we overcome walk limitations

Answer 3

Running eliminates the double limb support phase

Question 4

How does running differ from walking

Answer 4

No double limb support phase
Stride rate
Contact periods
Percent of cycle in stance & swing

Question 5

What does flight phase allow for

Answer 5

Speed, less phases of gait

Question 6

What defines running

Answer 6

Flight phase

Question 7

Bounding

Answer 7

Allows us to be displaced more than walking

Question 8

Upright when running

Answer 8

Not a primary goal of running, it just helps and bounding allows us to remain upright

Question 9

Running is dependent on

Answer 9

Surface type, incline, smooth vs uneven

Question 10

What changes in running as you change surfaces

Answer 10

Muscle activation at ankle and knee
ROM (kinematics)
Speed

Question 11

Running foot strike

Answer 11

Varies
Forefoot is becoming more popular but ankle injury more common
Heel contact puts more stress on knee rather than ankle