push up

Question 1

whats happening at joints

Answer 1

shoulder: flexed, protracted - extends, retracts, abducts as body lowers
elbow: flexes, extends
wrist: extended, isometric
ankle: dorsiflexion, isometric

downwards: eccentric
upwards: concentric

Question 2

peak of elbow

Answer 2

estimation: 150 degrees
kinovea: greater tubercle + lateral epicondyle of humerus, ulna styloid

Question 3

peak wrist extension

Answer 3

estimate: 50 degrees
lateral epicondyle, ulnar styloid process, 5th metacarpal
extended line from ulnar styloid process

Question 4

prime movers

Answer 4

pectoralis major flexing shoulder
deltoid + latissimus dorsi extending shoulder
serratus anterior protracting

biceps brachii flexing elbow
triceps brachii extending elbow

ED, ECRL + B, ECU extending wrist

Question 5

form

Answer 5

sternocleidomastoid + erector spinae keeping head erect

rotator cuffs stabilising shoulder joint

latissimus dorsi stabilising shoulder movement

abdominals stabilising core

Gluteus maximus + hamstrings keep hip extended

EDL + tibialis anterior dorsiflexing foot

Question 6

muscle groups

Answer 6

shoulder flexion: Pectoralis Major, Deltoid (Ant), biceps brachii, Coracobrachialis
extension: Latissimus Dorsi, Teres Major, Deltoid (Post)
abduction: Supraspinatus, Deltoid
protraction: Serratus Anterior, Pectoralis Minor
retraction: Rhomboids Major + Minor, Trapezius

elbow flexion: Biceps Brachii, Brachialis, Brachioradialis, Pronator Teres
extension: triceps, Anconeus

wrist extension: ED, ECRL + B, ECU, EI, EPL

Question 7

biceps brachii

Answer 7

origin: supraglenoid tubercle, coracoid process
insertion: radial tuberosity

range: outer > inner > outer

flexes shoulder and elbow as body lowers, extends as triceps straightens arms