Sit To Stand

Question 1

What are the 4 phases of the sit to stand transition?

Answer 1

Flexion momentum

Momentum transfer

Extension phase

Stabilization

Question 2

What are the critical events of the flexion momentum phase?

Answer 2

Ankle dorsiflexion

Momentum

Center of mass moves forward

Question 3

What is the required ROM during the flexion momentum phase?

Answer 3

Pelvis- anterior rotation

Hip- 120° flexion

Knee- 100° flexion

Ankle- 15° DF

Question 4

What is the muscle activation during the flexion momentum phase?

Answer 4

Tibialis anterior fires first followed by the gastroc and soleus

Question 5

What are the critical events of the momentum transfer phase?

Answer 5

Center of mass moves forward and down

Ankle DF

Weight acceptance

Question 6

What is the ROM requirements for the momentum transfer phase?

Answer 6

Pelvis- anterior rotation

Hip- 120° flexion

Knee- 100° flexion

Ankle- 15° DF

Question 7

What muscles are activated during the momentum transfer phase?

Answer 7

Increase activity of gastroc and soleus, decrease of Tibialis anterior

Peak activity of quad muscles

Glute max, biceps femoris, and semitendinosus kick on to help maintain control over feet

Question 8

What are the gastroc, soleus, and Tibialis anterior responsible for in the momentum transfer phase?

Answer 8

Weight acceptance

Question 9

What are the quads, glute max, and hamstrings responsible for in the momentum transfer phase?

Answer 9

Bringing COM forward

Question 10

What are the critical events of the extension phase?

Answer 10

Extension

Center of mass moves upward

Balance

Question 11

What are the ROM requirements for the extension phase?

Answer 11

Pelvis- anterior rotation

Hip- 120° flexion, full extension

Knee- 100° flexion, full extension

Ankle- 5° DF

Question 12

What muscles are active during the extension phase?

Answer 12

More activity in gastroc, soleus, glute max, and hamstrings

Less activity in Tibialis anterior and quads

Question 13

What are the critical events in the stabilization phase?

Answer 13

Extension

Center of mass moves upward

Balance (ankle strategy)

Question 14

What are the required ROM for the stabilization phase?

Answer 14

Pelvis- neutral

Hip- 120° flexion, full extension

Knee- 100° flexion, full extension

Ankle- 5° DF, 5° PF

Question 15

What is the functional task of each sit to stand phase?

Answer 15

Weight bearing moves from hips to feet