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NASM PES Ch 2
Major Muscles of HMS
Muscles | Concentric Action | Isometric Action |
---|---|---|
sartorius | hip flexion, external rotation & abduction, knee flexion, external rotation | LPHC and knee |
tensor facia latae | hip flexion, abduction, internal rotation | LPHC |
rectus femoris | hip flexion, knee extension | LPHC and knee |
biceps femoris - long head | knee flexion, hip extension, tibial external rotation | LPHC and knee |
semimembranosis | hip extension, knee flexion, tibial internal rotation | LPHC and knee |
semitendinosis | hip extension, knee flexion, tibial internal rotation | LPHC and knee |
adductor magnus, longus, brevis, gracilis & pectineus | adduction, flexion,internalrotation, | LPHC |
gastrocnemius | plantarflexion | foot & ankle complex |
soleus | plantarflexion (esp. knee bent) | foot & ankle complex |
tibialis anterior | dorsiflexion, inversion | arch of foot |
psoas | hip flexion, external rotation, extends & rotates lumbar spine | LPHC |
gluteus maximus | hip extension, external rotation | LPHC |
gluteus medius - anterior fibers | hip abduction, internal rotation | LPHC |
peroneus longus | plantarflexion, eversion | foot & ankle complex |
tibialis posterior | inversion, plantarflexion | arch of foot |
vastus lateralis | knee extension | knee |
vastus intermedius | knee extension | knee |
vastus medialis | knee extension | knee |
biceps femoris - short head | knee flexion, tibial external rotation | knee |
adductor magnus - posterior fibers | adduction, extension, external rotation | LPHC |
gluteus medius - posterior fibers | hip abduction, external rotation | LPHC |
gluteus minimus | hip abduction, flexion, internal rotation | LPHC |
piriformis | hip external rotation, abduction & extension | Hip and SIJs |
rectus abdominus | spinal flexion, lateral flexion & rotation | LPHC |
external oblique | spinal flexion, lateral flexion & contralateral rotation | LPHC |
internal oblique | spinal flexion (bilateral), lateral flexion & ipsilateral rotation | LPHC |
transverse abdominus | increases intra-abdoominal pressure. supports abdominal viscera | synergistically w/internal oblique, multifidus & deep erector spinae to stabilize LPHC |
diaphragm | pulls central tendon inferiorly, increasing the volume in the thoracic cavity | LPHC |
latissiumus dorsi | shoulder extension, adduction & internal rotation | LPHC, shoulder |
serratus anterior | scapular protraction | scapula |
rhomboids | produces scapular retraction & downward rotation | scapula |
lower trapezius | scapular depression | scapula |
middle trapezius | scapular retraction | scapula |
upper trapezius | cervical extension; lateral flexion & rotation; scapular elevation | stabilizes cervical spine & scapula, stabilizes medial border of scapula creating a stable base for prime movers during scapular abduction & upward rotation |
levator scapulae | cervical extension, lateral flexion & ipsilateral rotation when scapulae is anchored; assists in elevation & downward rotation of scapulae | cervical spine & scapulae |
pectoralis major | shoulder flexion (clavicular fibers), horizontal adduction & internal rotation | shoulder girdle |
pectoralis minor | protracts the scapula | shoulder girdle |
anterior deltoid | shoulder flexion & internal rotation | shoulder girdle |
medial deltoid | shoulder abduction | shoulder girdle |