4. Shoulder girdle movement analysis chart After analyzing each and a lowering p

Question

4. Shoulder girdle movement analysis chart After analyzing each and a lowering phase. For each phase, determine the shoulder girdle movements occur shoulder girdle muscles primarily responsible for causing/controlling those movements. Beside each muscle in exercise in the chart, break each into two primary movement phases, such as a lifting phase ring, and then list the each movement, indicate the type of contraction as follows: I-isometric; C-concentric; E-eccentric. Initial movement (lifting) phase Secondary movement (lowering) phase Exercise Movement(s) Agonist(s)-(contraction type) Movement(s) Agonist(s)-(contraction type) Push-up Chin-up Bench press Dip Lat pull Overhead press Prone row Barbell shrugs

Explanation / Answer

1) Push ups-
Initial phase:
Movements : Extension at elbow, adduction at shoulder joint
Muscles involved : Triceps (extesnion at elbow), rectus and transversus abdominus (keep body off the floor), deltoid (adduction at shoulder), erector spinae (stabilise back)

Secondary movement:
Movements: Flexion at elbow joint, abduction at shoulder.
Muscles involved: Biceps (Flexion at elbow), rectus and transversus abdominus, deltoid (abduction at shoulder), erector spinae.

2) Chin ups:
Initial phase:
Movements: Arms are pulled downwards and backwards - shoulder extension and adduction
Muscles involved : Latissimus dorsii mainly. Teres major, biceps amd brachialis also involved.

Relaxation phase:
Movements: Arms upward at shoulder joint. Elbow is extended.
Muscles: Triceps provides stability. Latissimus dorsii and Teres major.

3) Bench press:
Initial phase:
Movements: Extension of elbow, adduction at shoulder joint.
Muscles: Mainly pectoralis Major, anterior deltoid, triceps, serratous anterior

Relaxation phase:
Movements: Relaxation at elbow, abduction at shoulder.
Muscles: Biceps provides stability, pectoralis major.

4) Dip:
Initial phase:
Movements - Extension at elbow, adduction at shoulder.
Muscles: Triceps, anterior deltoid, pectoralis, rhomboid muscles.

Relaxation phase:
Movements: Flexion at elbow, abduction at shoulder
Muscles: Stability provided by biceps brachii, Trapezius.

5) Lat pull:
Intial phase:
Movements: Flexion at elbow, adduction at wrists.
Muscles: Main muscle involved is Latissimus dorsii. The name lat pull is due to the involvement of Latissimus. Rhomboids, teres major and minor, infraspinatus and muscles of shoulder cuff are involved.

Relaxation phase:
Movement: Extension of elbow
Muscles: mainly triceps to stabilise elbow during extension.

6) Overhead press:
Initial phase:
Movements: extension of elbow, overhead abduction of shoulder joint
Muscles: Triceps, Deltoid, Rotator cuff balances.

Movements: Flexion of elbow adduction of shoulder.
Muscles: Chest and abdominal muscles provide Stability, biceps control flexion of elbow.

7)Prone row:
Initial phase
Movement: Shoulder extension, scapular retraction
Muscles: Latissimus dorsii, posterior deltoid, teres major, triceps, trapezius, rhomboid major and minor

Relaxation phase:
Movement: All muscles are relaxed. No specific muscle provides stability.

8) Barbell shrugs.
Initial phase:
Movement: With elbow extended, barbell is gripped with overhead grip hand bought in front of shoulder.
Muscles: Trapezius and Rhomboids. Biceps provide stability

Relaxation phase:
Movement: Barbell is bought back in front of abdomen
Muscles involved: Biceps provide stability. Trapezius and Rhomboides help in controlled release.

Please feel free to ask any doubts in comment section. Hope I helped. :)

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