The results showed that after the day abstinence, the amount of oxygen required was reduced by 13 to 79 percent. Keep in mind that study was done using chronic smokers. Imagine the performance improvements that could be made by an infrequent or light smoker. But this should not be the only concern when one quits smoking. An issue that most people will have address when they decide to stop smoking is the possibility of weight gain.
Many smokers say they are worried that they'll gain weight if they stop smoking.
Well for many, they're right. There are several studies, that indicate that smokers tend to weigh less than nonsmokers. Some physical, some mental. Some of the weight gain can be attributed to the smoker's tendency to snack more as a substitute for their nervous habit. What's important is that when a person quits smoking, that they do not substitute this vice for another.