Quads

Back of thigh - knee flexion, hip extension

Hamstrings

Outer hip - hip abduction, lateral stability

Hip extensors - hip extension, external rotation

Upper portion of rectus - trunk flexion from top

Lower portion of rectus, hip flexors - leg raises

Deep stabilizers - anti-movement, bracing

Front shoulder - shoulder flexion, pressing

Side shoulder - shoulder abduction, V-taper width

Rear shoulder - shoulder extension, horizontal abduction

Upper back/neck - scapular elevation, retraction

V-taper width - shoulder extension, adduction, pulling

Mid-back, rotator cuff - scapular retraction, shoulder stability

Erector spinae - spinal extension, posture

Side ribcage - scapular protraction, punching

Upper pec - incline pressing, shoulder flexion

Front upper arm - elbow flexion, supination

Grip strength - crushing, pinching, holding