Active Isolated Stretching works with 3 basic principles
Some joints and or muscles that have a lack of function need increased oxygen and blood ?ow. When you contract or stretch a muscle you push the blood and oxygen out of that tissue. Increased ?ow happens when the muscle is in a relaxed state. The bene?t of physical activity is in the recovery process. Each stretch should be done 8-10 times.
Pectoralis Major Stretch:
The muscles in front (anterior) of your chest are most often tight and short due to all the primary movements with our arms working in front of our body including but not limited to; working on a computer, picking up a child, eating, driving and most sporting activities. Pectoralis Major has a direct relationship to shoulder function with its attachment to the trunk/chest and to the upper arm bone (the humerus).
Like with all Active Isolated Stretching movements you need to make a positive movement to tell the apposing muscle to let go and this is not an exception.