How can stress cause injuries and illnesses?

Stress makes you nervous almost and makes our heart go faster and your brain think??? it could give you a heart attack?? i wouldn't trust this lol

High blood pressure, often connected with stress, can lead to heart disease and strokes. Stress in other aspects of life can affect your fitness and training or lead to injury or negative consequences as well. ... Not only does this lead to poor performance, it can also cause injury.

20 times a minute is usually the average respritory rate of an adult. additionally the patient is breathing on his own, is clearly maintaining his airway, and is intaking a sufficient amount of air. you shouldn't use a bag valve mask, cpap, or other form of positive pressure ventilation, unless the patient has lost control of his airway, and is not breathing (apneic) or has rapid breathing or slow and shallow respirations. this patient would most likely and should be put on an non-rebreather mask or nrb attached to 100% high flow oxygen at 15 l/min. don't use a nasal cannula, as the amount of oxygen it provides is limited with a rate of 6 l/min.