Sit to Stand Flashcards
Describe starting posture - 5 point
buttocks and thighs in contact with seat - stable BOS
stability due to flexor and extensor activity in the pelvic and lumbar spine
shoulders protracted, UL adducted and medially rotated
hip and knees at 90 with some lateral rotation and abduction
COG within BoS
Joint movements: pre-extension
feet drawn back - 10° behind the knee joint
Slight dorsiflexion of your ankle
Flexion of the hips brings trunk forwards
feet fixed so further dorsiflexion of the ankle
Knees flex forwards over feet
Joint movements: extension phase
Coordinated movement of
Knee extension
Hip extension
Ankles move into neutral from dorsiflexion
Describe the muscle contraction as the feet move backwards
Concentric contraction of tibialis anterior and hamstrings
soles remains extensible
Describe the muscle contraction as hips move into flexion
Concentric iliopsoas
Isometric abdominals
Eccentric back extensors and hip expenses to control momentum
Describe the muscle contraction to stabilise the foot in Pre-extension
Concentric tibialis anterior to stabilise foot and rotate to tibia forwards on ankle
Describe muscle contraction to extend the knee
Concentric contraction of quadriceps– Act would reverse origin and insertion due to the tibia being fixed
Describe the muscle contraction to extend hip
Concentric contraction of gluteus maximus and hamstrings to extend the hip
Describe the contraction to bring the ankle back to neutral
Concentric contraction of soleus to bring tibia into plantargrade
Describe the muscle contraction to maintain quiet standing
Eccentric contraction of the hip knee and ankle flexors to work against forward momentum
Described the speed of the movement
Usually takes one to 3 seconds, if too fast and then maybe a lost of balance and fall
If too slow and the mental or not be generated and moved only the fail or require much more energy
