Coffee is a very common beverage consumed all over the world. One of the primary ingredients in coffee is caffeine, a powerful nervous system stimulant. Here I am going to discuss some of the more recent findings on this popular beverage and stimulant.
Coffee Causes Dehydration: A 2005 study conducted by Lawrence Armstrong, a professor of exercise and environmental physiology at the University of Connecticut, concluded that that drinking moderate amounts of caffeine does not lead to dehydration. The results were published in the International Journal of Sports Nutrition and Exercise Metabolism.
Armstrong explains that moderate amounts of caffeine (200-300 milligrams or about the equivalent of two cups of brewed coffee) does in fact have a diuretic (water loss) effect on the body, but does not cause total body dehydration.
It is the same effect as how drinking a lot of water will increase your urine output for a while and then eventually will decline. Just because you are going to the bathroom more does not mean you are dehydrated.
Coffee Makes It Harder To Sleep: Coffee usually has significant amounts of caffeine in it. Multiple studies have shown that caffeine can reduce the overall quality and number of minutes a person spends sleeping.
In a 2006 study, published in the Journal of Neuropsychopharmacology, Canadian scientists showed that the members of the caffeine group slept less and had a lower quality of sleep relative to the control group.
In short, caffeine consumption can reduce the quality of a person’s sleep, thereby making it increasingly difficult to wake up rested. It can also can increase the number of times a person wakes throughout the night. These results have been duplicated and supported in many previous studies on the effects that caffeine has on sleep.
Despite the proven and well documented effects caffeine can have on your ability to get quality sleep and wake up rested, many people choose to drink coffee or other caffeinated beverages at night in hopes of warding off fatigue during late work shifts, nights out and evening study sessions. If a good night of sleep is your goal stop consuming caffeine after 4PM.
Caffeine As A Performance Enhancer/Fat Burner: Caffeine is a powerful nervous system stimulant. This results in increased muscular contractions and can improve your power output. More importantly, it can have a very powerful effect on mood and well-being/alertness, which is closely tied to your ability to handle both physical and mental stresses. This is the reason that it is banned in the Olympics and many international sporting events. It is a powerful stimulant that works.
While caffeine can have a positive impact on explosive events primarily due to the mood enhancing effects caffeine offers, the real benefit comes during longer (5+ minutes) efforts at higher intensities (70%+ efforts). In this way, caffeine benefits endurance activities more than explosive events.
A lot of fat loss supplements include caffeine and tout it as a fat burning ingredient. Caffeine itself will have a very minimal impact on the total number of calories burned (typically burning a nominal 10-15 additional calories an hour). The real benefit for the recreational athlete is the effect it has on your mood.
Caffeine revs up your nervous system and improves your mood, which enables you to do more work with less perceived effort. This results into a better workout and you end up burning more calories than you could without caffeine.
The typical performance enhancing caffeine dosage for the recreation athlete is anywhere from 300-500 milligrams taken about an hour before exercise. This gives the caffeine a chance to get into your system and work its magic.
Decaf High On Diptenes, Low On Blood Pressue: A study led by Dr. Robert Superko of the Fuqua Heart Center in Atlanta, suggests that drinking decaffeinated coffee leads to a rise in bad cholesterol whereas drinking regular coffee does not.
According to Dr. Superko the reason for the increase in cholesterol from decaf is because the species of bean used for decaf is different. Decaf is usually made out of the robusta bean and regular coffee out of the arabica bean. The difference between the two is that robustas have a relatively high concentration of fats called diptenes, and these fats contribute to the increase in blood cholesterol.
Dr. Superko notes that while the cholesterol increase they found is significant in the lab, it is a pretty small change of about 10 points in the real world. This is not a huge drop in cholesterol, but if you are looking for ways to drop your high cholesterol number, and you currently drink a lot of decaf, stopping the decaf may help out.
In the same study it was discovered that if you have high blood pressure that caffeinated beverages will increase blood pressure levels while decaf will not. Obviously, if you have high blood pressure, avoiding caffeinated beverates can help you manage your blood pressure.
As a note, Dr. Superko presented these findings to the American Heart Association in 2005
Obviously, this article is intended to inform you about some of the pros/cons of coffee and caffeine. The jury is still out on whether it is good, bad or neutral for you. As always, consult with your doctor before implementing any dietary changes. The response to caffeine varies by individual. Coffee can have a significant impact on individuals with diabeties, high blood pressure, expecting mothers or any other heart related conditions.