Transcript Muscles - Western Springs College

MUSCLES
Muscles Recap
Agonist and Antagonist
 When one muscle is
working the other is
relaxed. We use the
following terms to
explain what each
muscle is doing:
 Agonist = is the
working muscle
 Antagonist = is the
oppostie muscle which
is not working (ie
relaxed)
In this diagram of a bicep curl
which muscle is the agonist
and which is the antagonist?
Agonist = Bicep
Antagonist = Tricep
MUSCLES
Rectus Abdominus (Abs)
 Location
 2 muscles running the length of your abdomen.
 They run from the pubis to the 5th, 6th, 7th ribs
 Movement
 Flexion of the trunk.
 Lateral flexion of the trunk.
 Application
 Sit-ups. Cartwheels. Bending in cricket.
Erector Spinae group
 Location
 1 of the main muscles of the lower back.
 They run from the pubis to the lumbar vertebrae.
 Movement
 Extension of the spine.
 Lateral flexion of the trunk.
 Application
 Rowing. Swimming. Straightening in cricket.
Trapezius
 Location
 A triangular muscle on the posterior of your back.
 From the base of the skull, the 7th vertebrae, and all
thoracic vertebrae to the scapula and clavicle.
 Movement
 Raise the head.
 Pull the shoulders back.
- Raise the scapula.
- Drop the scapula.
 Application
 Rowing. Looking up in basket ball. Pulling back in throwing
Latissimus Dorsi (Lats)
 Location
 Broadest muscle of the back.
 The lower thoracic and lumbar regions to the anterior of
the humerus.
 Movement
 Adduction of the upper arm.
 Extension of the shoulder.
 Internal rotation of the shoulder.
 Application
Because it attaches to
the front of the
humerus
 Ten pin bowling. Boxing (drawing arm back to punch).
Deltoid
 Location
 Triangular shaped muscle above the shoulder.
 From the clavicle and scapula to the humerus.
 Movement
 Flexion of the shoulder.
 Abduction of the arm.
- Extension of the shoulder.
- Rotation of the shoulder.
 Application
 Throwing. Punching. Swimming.
Pectoralis Major (Pecs)
 Location
 Triangular muscle located on the chest.
 From the clavicle, sternum and 6th rib to the humerus.
 Movement
 Flexion of the shoulder.
 Rotation of the shoulder.
 Rotation of the shoulder (internal).
 Application
 Press-ups. Throwing. Punching.
Biceps Brachii (Biceps)
 Location
 Two headed muscle located on the anterior of the humerus.
 From the scapula to the radius (upper aspect).
 Movement
 Flexion of the elbow.
 Flexion of the shoulder.
 Application
 Biceps curl. Rowing. Pulling
Triceps
 Location
 Covers the whole back of the humerus
 From the scapula over the humerus to the ulna (upper
aspect).
 Movement
 Extension of the elbow.
 Extension of the shoulder.
 Application
 Karate chop. Punching. Press-up.
Gluteus Maximus (Gluts)
 Location
 Your backside/bum.
 It runs from your pelvis (ilium, sacrum and coxxyx) to the
upper third of your femur.
 Movement
 Extension of the leg.
 Abduction of the leg.
 External Rotation of the leg (outwards).
 Application
 Jumping. Kicking. Running.
Quadriceps (Quads)
 Location
 This is a group of four muscles on the anterior aspect of the
thigh.
 They are
- 1) Rectus Femoris.
- 3) Vastus Lateralis
- 2) Vastus Medialis.
.
- 4) Vastus Intermedius.
 Movement
 Flexion of the hip.
 Extension of the knee.
 Application
 Jumping. Kicking. Running.
Hamstrings (Hammy)
 Location
 This is a group of three muscles on the posterior aspect of
the thigh.
 They are
- 1) Semitendinsus.
- 3) Semimembranosus.
 Movement
 Knee flexion.
 Hip extension.
 Application
 Jumping. Kicking. Running.
- 2) Biceps Femoris.
Gastrocnemius
 Location
 A large fleshy muscle on the posterior of the lower leg.
 From the distal aspect of the femur to the tarsals (via the
Achilles' tendon).
 Movement
 Knee flexion.
 Plantarflexion.
 Application
 Pointing toes. Kicking. Running.
Tibialis Anterior
 Location
 Located on the anterior aspect of the lower leg
 From the proximal aspect of the tibia to the toes
 Movement
 Dorsiflexion.
 Inversion.
 Application
 Passing in soccer (outside foot). Kicking. Rowing.
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