kneeling superman

Question 1

whats happening at joints

Answer 1

elbow: extended, flexes
shoulder: flexed, extends
hip: extend, flexes
knee: extended, flexes
thoracic spine: flexion
lumbar spine: extension

concentric when flexed, body working isometrically to stabilise position

Question 2

peak flexion of knee

Answer 2

estimate: 100 degrees
kinovea: greater trochanter, lateral condyle of femur, lateral malleolus of fibula

Question 3

prime movers

Answer 3

triceps extending elbow of stabilising arm
biceps brachii flexing moving arm

deltoid + latissimus dorsi extending shoulder
deltoid + pectoralis major flexing shoulder

rectus femoris flexing hip, extends knee when leg straightens
gluteus maximus extending hip
hamstrings extend hip, flex knee

rectus abdominis + external oblique flexing + laterally flexing trunk

Question 4

form

Answer 4

sternocleidomastoid keeping head erect

rotator cuffs stabilising shoulder joint
Serratus anterior protracting shoulder

abdominals stabilising + rotating trunk
multifidus + quadL extending lumbar spine

adductors
gluteus medius + minimus

biceps + triceps on stabilising arm
quads, hamstrings, gastrocnemius on stabilising leg

FDL, FHL, tibialis posterior plantarflexing foot

Question 5

biceps femoris

Answer 5

origin: ischial tuberosity + linea aspera
insertion: head of fibula

range: outer > inner

flexes leg at knee joint, extends thigh as leg straightens out