1. pectoralis major is usually called pectoralis major, and it is fan-shaped. It is located in the anterior upper part of the thorax, starting from the medial half of the clavicle, sternum and 1~6 costal cartilage, and the muscle bundle is concentrated to the outside and ends at the crest of the greater tubercle of humerus.

Latissimus dorsi. Starting point: thoracic rib 7- 12 spinous process, thoracolumbar fascia, iliac crest and inferior rib 3-4. Intertubercle groove of humerus is dominated by thoracic dorsal nerve: humerus stretches, adducts and pronates, and the limbs are pulled up when climbing.

2. Exercise method:

Pectoralis major: (function: shoulder horizontal adduction)

Training actions:

Combined instrument:

Sitting posture chest push

Butterfly chest clip

Upper inclined plate barbell

Dumbbell bench press

Lower inclined plate barbell

Dumbbell bench press,

Dumbbell bird (upper, flat and lower inclined bird)

Steel wire and elastic rope:

gantry crane

Cable cross-clamp box

Rubber band

Elastic rope bird

push-up

Functional training:

Fitness ball, (single, double) push-ups

Spider-Man push-ups

Latissimus dorsi: (function: shoulder adduction and shoulder extension)

Combined instrument:

Sitting rowing, high tension device, low tension device (narrow grip)

Free weight:

pull-up

One-arm dumbbell rowing

Barbell row

Steel wire and elastic rope:

Straight arm pressing down

Rowing with elastic rope