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.

The answer might be d

It settles nerves, reduces the tension.