Answer:
it could be due to bone muscle or cartilage creating pressure or shoulder impingement syndrome where the outer edge of your shoulder blades rub against your rotator cuffs
Explanation:
Use a heart tracker while walking, sometimes even a phone could have an app to do that.
U should drink some water and take deep slow breaths and if u don't feel better u should go to an emergency center
2. I'm not sure
3. Any time that's best and most comfortable for you
A sedentary lifestyle means you don't move anywhere. Similar to coral or sponges.
