Major Muscle Groups

Major Muscle Group
Location
Functional Role
Abdominal

Stomach

Sitting up, postural alignment
Biceps

Front of upper arm

Lifting, pulling
Deltoids

Top of shoulder

Overhead lifting
Erector Spinae

Low back

Postural alignment
Gastrocnemius & Soleus

Back of lower leg

Push off for walking, standing on tiptoes
Gluteus

Buttocks

Climbing stairs, walking, standing up
Hamstrings

Thigh – back

Walking
Latissimus Dorsi & Rhomboids

Back – Lats are the large triangular muscle in the mid-back

Rhomboids are between the shoulder blades

Lats – pull ups, chin-ups, lat pull downs

Rhomboids – chin-ups & bent arm rows

Obliques

Side of body

Rotation and side flexion of body
Pectoralis

Front of upper chest

Push up from lying position, push open a door
Quadriceps

Thigh – front

Climbing stairs, walking, standing up
Trapezius

Large muscle in upper and mid-back

Moves head sideways
Triceps

Back of upper arm

Pushing

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