I stole this from Lady C :
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If you are curious as to the effects of alcohol on the body, this could be the most eye-opening article you will ever read.
Many of us associate the effects of alcohol on the body with the heart, lungs, liver, brain, memory, etc. Furthermore, if asked about effects of drinking alcohol in terms of our fitness goals, most people will let you know about the infamous beer belly.
You know what I'm talking about right?
Drink too much and you end up storing too many calories as fat.
Many people will choose low calorie alcohol drinks or low carb alcoholic beverages in an attempt to avoid the fat storage issue. They feel that by making this choice the only bad effects of alcohol - increased fat storage - will be minimized.
But what you didn't know is that only about 5% of the calories from alcohol are stored as fat! [14]
Then it hit me as it should hit you right about now...
The effects of alcohol on the body are far more damaging than can be predicted by the number of empty calories in some alcoholic beverage.
The truth is...
1- Alcohol really affects the amount of fat your body can and will burn for energy!
In a study done by the American Journal of Clinical Research [4] they concluded that just a mere 24g of alcohol consumption showed whole-body lipid oxidation ( the rate at which your body burns fat) decreased by a whopping 73%!
When alcohol goes thru the liver, the by-product is called Acetate. It would appear that acetate puts the proverbial brakes on fat burning.
Your body can use many types of fuel. Protein, carbohydrates and fat. In many cases, the fuel used is dictated by it's availability.
Trouble is...
Your body tends to use whatever you feed it for fuel right? As your acetate levels increase, your body burns more acetate as fuel.
What this means is...
Fat burning takes a back seat!
What it all boils down to is this...
a) You consume a couple of alcoholic drinks or more.
b) Your liver metabolizes that into acetate.
c) Your body uses the acetate for fat as fuel.
2- Increase in appetite
In another American Journal of Clinical Nutrition study, there was evidence to suggest that consumption of alcohol lead to an increase in appetite over that of any other carbohydrate type drink. [5]
Researchers over in the Research Department of Human Nutrition and Center for Advanced Food Studies in Denmark [8] concluded that consumption of alcoholic beverages, and wine in particular, may enhance total energy intake at a meal relative to a soft drink, when served with no restriction.
3- Decrease in Testosterone and an Increase in Cortisol
A study of 8 healthy male volunteers observed that after drinking alcohol, the effects of a significant decrease in testosterone and an increase in cortisol (a muscle destroying hormone) lasted up to 24 hours! [6]
The only real question to ask yourself is this...
If you are serious about building muscle and burning fat, you want all the free testosterone levels you can get and you want to reduce cortisol in any way you can. That means go lite on the drinking because it does affect your hormones.
What more...
Is that the effects were even worse if you exercise before drinking. [1] This means that if you are going out and will be drinking more than a small amount of alcohol, you might as well skip the gym.
Not shocking is a study done by the Department of Radiology, Sahlgrenska Hospital, Goteborg, Sweden [2] that determined increased waist to hip ratio of alcoholics may include not only changes in adipose tissue, but also in muscle tissue distribution.
In layman's terms.. that means more fat around the waist and less overall muscle mass.
4- Decrease in vitamin and mineral absorption
When you consume large quantities of alcohol, your liver is busy converting the alcohol to acetate and any vitamins and minerals that it might process are taken up by the detoxification process.
Alcohol interferes with the metabolism of most vitamins, and with the absorption of many nutrients. Alcohol stimulates both urinary calcium and magnesium excretion. [13]
This just means that you'll get less of a benefit from the "healthy" meal you may be consuming.
Food in the stomach will compete with ethanol for absorption into the blood stream. It is well known that alcohol competes and influences the processing of nutrients in the body. [12]
5- Decrease in protein synthesis of type II fibers
This means the actual building of muscle is slowed down by 20%+ or more. This included a 35% decrease in muscle insulin-like growth factor-I (GF-I). [9]
6- Dehydration
A common side effect of alcohol is dehydration. Alcohol is a diuretic. Drinks containing 4% alcohol tend to delay the recovery process. [11]
Considering how important water is to muscle building and general health, it's clear that dehydration can put a damper on your progress. After alcohol consumption the first thing you might want to do is drink coffee. But that's a diuretic as well. How to avoid dehydration? Drink more water.
7- Sleep
Alcohol consumption, especially at the times when you would normally sleep, can have effects on the quality of sleep. Clearly high quality sleep is extremely important to the rebuilding and growth process of muscle. Without proper rest and recovery, your gains will be affected.
Alcohol consumption can induce sleep disorders by disrupting the sequence and duration of sleep states and by altering total sleep time as well as the time required to fall asleep. [10]
8- The next day
A rather obvious conclusion but if you plan on drinking on a Friday night in excess then the leg workout you thought of doing on Saturday morning won't be top notch. It takes a bit to recover, your body to detoxify and for you mentally to be prepared to workout.
Not to mention you need energy for the workout ahead.
Sure you can hit the weights but my point is...
It's not going to be the best workout you've ever experienced.
At this point you might be totally discouraged to ever drink any alcohol again. But there's some good news.
Here's proof...
In the November 2004 issue of the International Journal of Obesity [7] they did a study on the effects of moderate consumption of white wine on weight loss.
Each group consumed 1500 calories. 150 calories came from white wine in one group and 150 calories from grape juice in another.
The conclusion?
An energy-restricted diet is effective in overweight and obese subjects used to drinking moderate amounts of alcohol. A diet with 10% of energy derived from white wine is as effective as an isocaloric diet with 10% of energy derived from grape juice.
It's simple: Moderation is the key! (with first place being abstinence as you already know).
In any event...
The effects of alcohol on your body when it comes to building muscle and burning fat are quite clear. It is a lot more than just some extra calories stored as fat. If you consume too much, it can derail your goals a lot longer after your head has hit the pillow and you've gone to sleep.
References:
1. Heikkonen, E., Ylikahri, R., Roine, R., Valimaki, M., Harkonen, M., & Salaspuro, M. (1996). The combined effect of alcohol and physical exercise on serum testosterone, luteinizing hormone, and cortisol in males. Alcoholism, Clinical and Experimental Research, 20, 711-716
2. Kvist, H., Hallgren, P., Jonsson, L., Pettersson, P., Sjoberg, C., Sjostrom, L., & Bjorntorp, P. (1993). Distribution of adipose tissue and muscle mass in alcoholic men. Metabolism, 42, 569-573
3. Raben A, Agerholm-Larsen L, Flint A, Holst JJ, Astrup A. (2003). Meals with similar energy densities but rich in protein, fat, carbohydrate, or alcohol have different effects on energy expenditure and substrate metabolism but not on appetite and energy intake. American Journal of Clinical Nutrition, 77, 91-100
4. Siler, S.Q., Neese, R.A., & Hellerstein, M.K. (1999). De novo lipogenesis, lipid kinetics, and whole-body lipid balances in humans after acute alcohol consumption. American Journal of Clinical Nutrition, 70, 928-936
5. Tremblay, A., & St-Pierre, S. (1996). The hyperphagic effect of a high-fat diet and alcohol intake persists after control for energy density. American Journal of Clinical Nutrition, 63, 479-482
6. Valimaki, M.J., Harkonen, M., Eriksson, C.J., & Ylikahri, R.H. (1984). Sex hormones and adrenocortical steroids in men acutely intoxicated with ethanol. Alcohol, 1, 89-93
7. Flechtner-Mors, M., Biesalski, H.K., Jenkinson, C.P., Adler, G., & Ditschuneit, H.H. (2004). Effects of moderate consumption of white wine on weight loss in overweight and obese subjects. International Journal of Obesity and Related Metabolic Disorders, 28, 1420-1426
8. Buemann, B., Toubro, S., & Astrup, A. (2002). The effect of wine or beer versus a carbonated soft drink, served at a meal, on ad libitum energy intake. International Journal of Obesity and Related Metabolic Disorders, 26, 1367-1372
9. Lang CH, Frost RA, Kumar V, Wu D, Vary TC. (2000). Inhibition of muscle protein synthesis by alcohol is associated with modulation of eIF2B and eIF4E, 3, 322-31
10. Alcohol Alert, National Institute on Alcohol Abuse and Alcoholism, No. 41 July. 1988
11. Shirreffs, Susan M., and Ronald J Maughan. 91997). Restoration of fluid balance after exercise-induced dehydration: effects of alcohol consumption, Journal of Applied Physiology, Vol. 83, No. 4, pp. 1152-1158
12. "Alcohol, chemistry and you," Kennesaw State University, chemcases.com, Aug. 2002
13. Dept. of Health and Human Services, Report to Congress, 1990
14. "Why alcohol calories are more important than you think," Christian Finn, TheFactsAboutFitness.com
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