Some students may think that partying on the weekend has no negative effects on their academics as long as they leave time on Sundays to study. However, alcohol takes a long time to "clear" the system, and the effects of alcohol on the mind and body can last into the next day. This would make concentrating on a tough project or studying for an exam much more difficult.
For example, if a 120-pound woman has 4 drinks, it will take almost 10 hours for her blood alcohol level to return to zero (meaning no alcohol remains in the blood stream). If a 180-pound man has 6 drinks, it will take 8 hours for his blood alcohol level to return to zero. Although blood alcohol levels can rise quickly, it takes longer for blood alcohol levels to come down.