(HealthDay News) -- Among the many reasons for kids to stay away from tobacco: it can significantly affect performance if you're an athlete.
The U.S. Centers for Disease Control and Prevention explains how:
Tobacco can cause extra strain on your heart from narrowed blood vessels caused by nicotine.Tobacco can damage lungs, decreasing oxygen that muscles need to function well.Tobacco can increase shortness of breath.Tobacco can slow running speed and hinder your ability to run longer distances.-- Diana Kohnle 
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