1. Smoking
The resting heart rates of young adult smokers are two to three beats per minute faster than nonsmokers. This means that a smoker's heart is working twice as hard as a nonsmoker. ... Smoking increases the rate of a heart attack up to five times the normal risk. Smoke reduces the quantities of antioxidants in the blood stream, which protect the heart....
- Word Count: 496
- Approx Pages: 2
- Grade Level: High School