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> <channel><title>TweakFit &#187; caffeine</title> <atom:link href="http://tweakfit.com/tag/caffeine/feed/" rel="self" type="application/rss+xml" /><link>http://tweakfit.com</link> <description>A fitness blog about tweaking your way to great health</description> <lastBuildDate>Tue, 07 Feb 2012 13:00:18 +0000</lastBuildDate> <language>en</language> <sy:updatePeriod>hourly</sy:updatePeriod> <sy:updateFrequency>1</sy:updateFrequency> <generator>http://wordpress.org/?v=3.2.1</generator> <xhtml:meta xmlns:xhtml="http://www.w3.org/1999/xhtml" name="robots" content="noindex" /> <item><title>Gamma Labs PTF Pre Workout Supplement Review</title><link>http://tweakfit.com/gamma-labs-ptf-pre-workout-supplement-review</link> <comments>http://tweakfit.com/gamma-labs-ptf-pre-workout-supplement-review#comments</comments> <pubDate>Mon, 07 Nov 2011 13:00:36 +0000</pubDate> <dc:creator>Thaya Kareeson</dc:creator> <category><![CDATA[Nutrition]]></category> <category><![CDATA[alcar]]></category> <category><![CDATA[arginine]]></category> <category><![CDATA[beta alanine]]></category> <category><![CDATA[caffeine]]></category> <category><![CDATA[citrulline]]></category> <category><![CDATA[creatine]]></category> <category><![CDATA[Gamma Labs PTF]]></category> <category><![CDATA[pre training]]></category> <category><![CDATA[pre workout supplements]]></category> <category><![CDATA[tyrosine]]></category> <guid
isPermaLink="false">http://tweakfit.com/?p=5293</guid> <description><![CDATA[<p>If you missed it, I previously wrote about the top 10 rated pre workout supplements. After publishing that article, the nice guys at Gamma Labs contacted me and asked if I can help review their new Gamma Labs PTF (Pre-training Formula). Being the supplement nut that I am, I agreed that I will do an honest review of the product (no matter how good or bad it is). Let the review begin!&#8230;<div
style=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"clear:both\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"></div> <a
href="http://tweakfit.com/gamma-labs-ptf-pre-workout-supplement-review" class="read_more">Read the rest &#187;</a></p><p><hr
/> <a
href="http://tweakfit.com/gamma-labs-ptf-pre-workout-supplement-review">Gamma Labs PTF Pre Workout Supplement Review</a> is a post from TweakFit. TweakFit is a <a
href="http://tweakfit.com">fitness</a> blog dedicated to helping people get healthy and fit through proper exercise, nutrition, and injury maintenance.<br
/> <small><strong>Make sure you consult your doctor before attempting anything mentioned on this blog post.</strong><br/> Copyright © TweakFit 2009-2012. <br/> This feed is for personal, non-commercial use only. <br
/> The use of this feed on other websites breaches copyright. If this content is not in your news reader, it makes the page you are viewing an infringement of the copyright. <a
href="http://tweakfit.com/terms-of-use/">View full terms of use</a>.</small></p>]]></description> <content:encoded><![CDATA[<p><img
class="alignright" title="Gamma Labs PTF" src="http://cdn.tweakfit.com/wp-content/uploads/2011/11/gamma-labs-ptf-330x289.png" alt="Gamma Labs PTF" width="198" height="173" />If you missed it, I previously wrote about the top 10 rated pre workout supplements. After publishing that article, the nice guys at Gamma Labs contacted me and asked if I can help review their new <a
href="http://www.gammao.com/ccp0-display/infoP10.html?utm_source=blog&#038;utm_medium=review&#038;utm_campaign=101688" rel="follow">Gamma Labs PTF</a> (Pre-training Formula). Being the supplement nut that I am, I agreed that I will do an honest review of the product (no matter how good or bad it is). Let the review begin!</p><h3>What is Gamma Labs PTF?</h3><div
id="attachment_5295" class="wp-caption alignleft" style="width: 144px"><a
href="http://tweakfit.com/gamma-labs-ptf-pre-workout-supplement-review/gamma-labs-ingredients" rel="attachment wp-att-5295"><img
class="size-Extra Medium wp-image-5295" title="Gamma Labs PTF Ingredients" src="http://cdn.tweakfit.com/wp-content/uploads/2011/11/gamma-labs-ingredients-134x330.png" alt="Gamma Labs PTF Ingredients" width="134" height="330" /></a><p
class="wp-caption-text">Gamma Labs PTF Ingredients</p></div><p>Gamma Labs PTF is a pre workout supplement used to help you get more out of your workout by proving ingredients to help you lift harder and workout longer.</p><h4>Notable ingredients in the pre workout mix:</h4><ul><li><strong>Caffeine</strong> helps increases focus, alertness, and energy.</li><li><strong>Acetyl L-Carnitine</strong> helps increase alertness and energy through increased mitochondrial capacity.</li><li><strong>Creatine Complex:</strong> creatine is the most studied and proven to helps enhance workout performance.</li><li><strong>Arginine</strong> Complex helps promote Nitric Oxide (NO) synthesis (for pumps).</li><li><strong>Citrulline Malate</strong> also helps promote NO but has better uptake than Arginine.</li><li><strong>Beta Alanine</strong> has been shown to improve muscle endurance by buffering lactic acid.</li><li><strong>Tyrosine</strong> helps promote adrenaline synthesis to increase alertness, focus, and energy.</li></ul><h3>What did I think about Gamma Labs PTF?</h3><h4>The Good</h4><p><strong>Tastes like Hawaiian Punch.</strong> I love Hawaiian Punch!</p><p><strong>I love the clean energy.</strong> I have taken a lot of pre workout supplements out there and I am a big fan of clean energy. I once took 1.M.R. and I almost lost my mind from the psychotic rush it gave me. Psychotic energy might sound good at first, but not being able to focus when lifting heavy things can really be dangerous.</p><p><strong>No crash.</strong> Again, I have taken many stimulants out there that gives me a crash after the stims wear off. I didn&#8217;t get any crash at all from Gamma Labs PTF.</p><p><strong>It&#8217;s nice to feel the pump again.</strong> Usually after a few weeks of taking a pre workout supplement, I lose the pump feel. Previously, I was using Jack3d which uses Arginine-only as a Nitric Oxide promoter. I suspect that the citrulline malate had some part in helping me get the pump back.</p><p><strong>Work capacity stayed steady when switching from Jack3d to Gamma Labs PTF.</strong> I did not get any weaker (which is my biggest fear when trying new stuff). I was able to progressively get stronger and stronger week after week during the trail period.</p><h4>The Bad (no product is perfect)</h4><p><strong>The clean energy is great, but the PTF focus feeling didn&#8217;t last long enough for me.</strong> This problem is specific for people who can tolerate stimulants and workout longer than 1 hour. I found that the stimulants in 2 scoops run out after about an hour (even though I feel like the work capacity is still there since I was still able to lift heavy stuff). I ended up having to pop a caffeine pill at about the 55 minute mark.</p><p><strong>The cost can get pricey at $1.07-$2.13 per workout.</strong></p><h4>The Bottom Line</h4><p>Overall, <a
href="http://www.gammao.com/ccp0-display/infoP10.html?utm_source=blog&#038;utm_medium=review&#038;utm_campaign=101688">Gamma Labs PTF</a> is a pretty solid and clean pre workout supplement for people who are a bit new to pre workout supplements. It only contains things that have been heavily studied and proven to work and it doesn&#8217;t contain anything that lacks enough studies (e.g. 1,3-Dimethylamylamine) which can potentially be dangerous if you don&#8217;t cycle the substance.</p><p>If I can choose what to change about the pre-training formula, I&#8217;d tell the guys at Gamma Labs to throw in some choline citrate and more caffeine to help with focus and reduce the price a bit.</p><p><hr
/> <a
href="http://tweakfit.com/gamma-labs-ptf-pre-workout-supplement-review">Gamma Labs PTF Pre Workout Supplement Review</a> is a post from TweakFit. TweakFit is a <a
href="http://tweakfit.com">fitness</a> blog dedicated to helping people get healthy and fit through proper exercise, nutrition, and injury maintenance.<br
/> <small><strong>Make sure you consult your doctor before attempting anything mentioned on this blog post.</strong><br/> Copyright © TweakFit 2009-2012. <br/> This feed is for personal, non-commercial use only. <br
/> The use of this feed on other websites breaches copyright. If this content is not in your news reader, it makes the page you are viewing an infringement of the copyright. <a
href="http://tweakfit.com/terms-of-use/">View full terms of use</a>.</small></p>]]></content:encoded> <wfw:commentRss>http://tweakfit.com/gamma-labs-ptf-pre-workout-supplement-review/feed/</wfw:commentRss> <slash:comments>0</slash:comments> </item> <item><title>Water: Are you Getting Enough?</title><link>http://tweakfit.com/water</link> <comments>http://tweakfit.com/water#comments</comments> <pubDate>Wed, 24 Feb 2010 22:59:40 +0000</pubDate> <dc:creator>Stephanie Adams</dc:creator> <category><![CDATA[Nutrition]]></category> <category><![CDATA[caffeine]]></category> <category><![CDATA[electrolytes]]></category> <category><![CDATA[Gatorade]]></category> <category><![CDATA[hydration]]></category> <category><![CDATA[sugar]]></category> <category><![CDATA[water]]></category> <guid
isPermaLink="false">http://tweakfit.com/?p=755</guid> <description><![CDATA[<p>Water is essential for life. Water is the most important nutrient and the most abundant substance in the human body. Three quarters of the human body is made up of water; it is a major component in every cell.  As simple as the three molecules (two hydrogen and one oxygen) that make up water are, they are necessary for so many basic physiological functions. Directly and indirectly, water is responsible&#8230;<div
style=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"clear:both\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"></div> <a
href="http://tweakfit.com/water" class="read_more">Read the rest &#187;</a></p><p><hr
/> <a
href="http://tweakfit.com/water">Water: Are you Getting Enough?</a> is a post from TweakFit. TweakFit is a <a
href="http://tweakfit.com">fitness</a> blog dedicated to helping people get healthy and fit through proper exercise, nutrition, and injury maintenance.<br
/> <small><strong>Make sure you consult your doctor before attempting anything mentioned on this blog post.</strong><br/> Copyright © TweakFit 2009-2012. <br/> This feed is for personal, non-commercial use only. <br
/> The use of this feed on other websites breaches copyright. If this content is not in your news reader, it makes the page you are viewing an infringement of the copyright. <a
href="http://tweakfit.com/terms-of-use/">View full terms of use</a>.</small></p>]]></description> <content:encoded><![CDATA[<p><a
href="http://cdn.tweakfit.com/wp-content/uploads/2010/02/bottled-water.jpg"><img
class="alignleft size-full wp-image-756" title="CB061652" src="http://cdn.tweakfit.com/wp-content/uploads/2010/02/bottled-water.jpg" alt="" width="238" height="294" /></a></p><p><strong>Water</strong> is essential for life. Water is the most important nutrient and the most abundant substance in the human body. Three quarters of the human body is made up of water; it is a major component in every cell.  As simple as the three molecules (two hydrogen and one oxygen) that make up water are, they are necessary for so many basic physiological functions. Directly and indirectly, water is responsible for how the body regulates itself, produces energy, carries and delivers nutrients, filters toxins and many other vital processes of life. While a very straightforward concept, many people still do not give their body enough water or truly understand the benefits to the additives that go into water and other beverages.</p><p><a
href="http://cdn.tweakfit.com/wp-content/uploads/2010/02/Water-2D-flat.jpg"><img
class="size-medium wp-image-759 alignright" title="Water-2D-flat" src="http://cdn.tweakfit.com/wp-content/uploads/2010/02/Water-2D-flat-300x233.jpg" alt="" width="168" height="130" /></a><br
/><h3>The Facts</h3><p>Water is needed to separate (by a process called hydrolysis) a phosphate group from <a
href="http://en.wikipedia.org/wiki/Adenosine_triphosphate">adenosine triphosphate (ATP</a>) or <a
href="http://en.wikipedia.org/wiki/Guanosine_triphosphate">guanosine triphosphate (GTP)</a> to <strong>get energy</strong> as illustrated by the following equations.</p><ul> ATP +H2O = Energy + ADP + Inorganic Phosphate<br
/> GTP +H2O = Energy + GDP + Inorganic Phosphate</ul><p>All energy from food is used to generate ATP or GTP before its energy can be used by the human body, which makes water crucial to all energy usage by the human body. This is one of the reasons why drinking water can help you have more energy.</p><h3>The Function</h3><p>Water is the containing medium for electrolytes and all other ions throughout the human body.<br
/> <strong>**Being only 2% dehydrated can seriously degrade physical and mental functions.<br
/> **Being 15% dehydrated is likely to be lethal.</strong><br
/> Water is also very important for removing toxins from the human body.  The body has four major ways of removing toxins which are: <strong>perspiration, urination, bowels, and processing of toxins by the liver.</strong><br
/> Water is also important to <strong>fitness and fat loss</strong> for several reasons including the following:</p><li><strong> Water is filling without adding any calories.</strong></li><li> <strong>Dehydration will degrade a person’s ability to exercise and burn calories. (as mentioned in Quang&#8217;s <a
href="http://tweakfit.com/10-weight-loss-tips-working-man-pt1/">weight loss tips</a>) which makes adequate water intake necessary for any weight management solutions out there.</strong></li><li> <strong>Dehydration will reduce protein synthesis which is needed to build or repair muscles.</strong></li><h3>How Much To Drink</h3><p>It is normally recommended to drink about 2 to 3 quarts of water per day.  However, your size, activity level and the climate conditions you live in play an important role.  As a general rule: <strong>if your urine is bright yellow, then you need to drink more water.</strong> Also, anyone who exercises nonstop for more than 1 hour should consider replacing electrolytes along with the water.  This is to avoid <a
href="http://en.wikipedia.org/wiki/Hyponatremia">hyponatremia</a> (depleted sodium) or other forms of severe electrolyte depletion which can be dangerous.</p><p><strong>Recommended daily amount (litres/day)</strong></p><ul><li> Children: 1.3-1.7L</li><li> Men: 3.7L</li><li> Women: 2.7L</li><li> Pregnant Women: 3.0L</li><li>Lactating Women: 3.8L</li></ul><p><strong> Calculate Your Own Daily Water Requirement </strong><br
/> The International Sports Medicine Institute recommends using this formula to calculate your specific needs.<br
/> You can also try this online <a
href="http://www.calculatorslive.com/Daily-Water-Intake-Calculator.aspx">Calculator for Daily Water Requirement</a>.</p><p><strong>Body Weight (in pounds)<br
/> Water Needed for Activity Level (50% for Sedentary People; 75% for Active Individuals<br
/> Add 16 fl oz. if you live in a dry climate<br
/> Add 16 fl oz. for strenuous exercise.</strong></p><p>Example: 150 lbs. x 75% + 16 oz. + 16 oz. = 144.5 oz. per day.<br
/> if you divide by the number of hours you are awake, 144.5 oz/ 16 hrs. = 9 fl. oz per hour.</p><h3>Negative Consequences of Over Ingestion</h3><p>There are no maximum doses. Healthy and fully operating kidneys theoretically can filter up to 0.7 litres of water in one hour, that is almost 17 litres of water a day. However excessive ingestion of water and other liquids is extra work for the body. Signs of intoxication of water are hyponatriemya (decreased amount of natrium in blood) and rubdomiolysis (damage of muscularity – collapse of skeleton) what can cause acute incompetence of kidneys. Also it must be considered that average amount of water ingested by food is only 20% of recommended daily amount. The human brain is about 85% water and our bones are between 10 to 15% water.</p><h3>The Truth About Water</h3><p><strong>The real truth is that water is one of the best cures for our most common ailments.</strong> The flip side of this is that there is very little money in selling water and for the most part it is free. Doctors almost never write a prescription for water and yet look what all it can treat:<em> allergies, asthma, depression, high blood pressure, diabetes, headaches, chronic fatigue syndrome, colitis, alcohol dependency, lower back pain, neck pain, and on and on</em>.<br
/> Don’t be fooled by considering the coffee, tea or soda pop that you drink as part of your water intake; these products are caffeinated producing the opposite effect on our bodies. <strong>Caffeine</strong> acts as a <a
href="http://en.wikipedia.org/wiki/Diuretic">diuretic</a> to our system and actually results in water reduction to our bodies. The same applies to drinks with alcohol. If you are drinking these items make sure you don’t count them as part of your eight glasses of water per day.<br
/> <a
href="http://cdn.tweakfit.com/wp-content/uploads/2010/02/1241782375wdy0SM.jpg"><img
src="http://cdn.tweakfit.com/wp-content/uploads/2010/02/1241782375wdy0SM-281x300.jpg" alt="" title="1241782375wdy0SM" width="281" height="300" class="alignleft size-medium wp-image-837" /></a></p><h3>Drinking Water to Prevent Aging</h3><p>Now is it just coincidental that disease and/or health problems dramatically increase as we get older? It has not been well documented, but there is a common generalized reduction in the amount of water in their intake in people as they age, which reduces their body water percentage. Some of the symptons that older people get lead them to reduce their water intake (such as high blood pressure). Loss of water in all tissues continues and is probably involved in many of the physical alterations associated with aging.</p><h3>Strategies for Drinking More Water</h3><li><strong>Drink a glass of water before eating your meal</strong>. Then, drink another glass with your meal. This will help you feel more full, eat fewer calories and have more energy.</li><li><strong>Carry a Water Bottle.</strong> Stay hydrated throughout the day with little sips here and there. Try <a
href="http://www.hydracoach.com/applications/index.html">Hydracoach</a> Water Bottles to help you monitor your hydration level.</li><p><a
href="http://cdn.tweakfit.com/wp-content/uploads/2010/02/hydracoach.jpg"><img
class="alignleft size-thumbnail wp-image-769" title="hydracoach" src="http://cdn.tweakfit.com/wp-content/uploads/2010/02/hydracoach-150x150.jpg" alt="" width="150" height="150" /></a></p><li><strong>Calorie Free Flavor Enhancers</strong>. If you don&#8217;t like the taste of water or get tired of drinking the same thing, add something to it. The water isle in the grocery store gives you limitless options. Try ones with electrolytes, vitamins or antioxidants, and stay away from ones with sugar or high levels of artificial sweeteners.</li><p><hr
/> <a
href="http://tweakfit.com/water">Water: Are you Getting Enough?</a> is a post from TweakFit. TweakFit is a <a
href="http://tweakfit.com">fitness</a> blog dedicated to helping people get healthy and fit through proper exercise, nutrition, and injury maintenance.<br
/> <small><strong>Make sure you consult your doctor before attempting anything mentioned on this blog post.</strong><br/> Copyright © TweakFit 2009-2012. <br/> This feed is for personal, non-commercial use only. <br
/> The use of this feed on other websites breaches copyright. If this content is not in your news reader, it makes the page you are viewing an infringement of the copyright. <a
href="http://tweakfit.com/terms-of-use/">View full terms of use</a>.</small></p>]]></content:encoded> <wfw:commentRss>http://tweakfit.com/water/feed/</wfw:commentRss> <slash:comments>4</slash:comments> </item> <item><title>Energy Drinks and Caffeine: Safety and Effectiveness</title><link>http://tweakfit.com/energy-drinks-caffeine-supplementation</link> <comments>http://tweakfit.com/energy-drinks-caffeine-supplementation#comments</comments> <pubDate>Tue, 23 Feb 2010 16:06:50 +0000</pubDate> <dc:creator>Peter Rumford</dc:creator> <category><![CDATA[Nutrition]]></category> <category><![CDATA[caffeine]]></category> <category><![CDATA[coffee]]></category> <category><![CDATA[energy drinks]]></category> <category><![CDATA[FDA]]></category> <category><![CDATA[red bull]]></category> <category><![CDATA[supplements]]></category> <guid
isPermaLink="false">http://tweakfit.com/?p=786</guid> <description><![CDATA[<p>HISTORY
Caffeine is a drug that is present in the beans, leaves, or fruit of over 60 plants.  It is also one of the main ingredients in the ECA stack. History of it&#8217;s use by humans dates back to 2737 B.C. in China, when Emperor Shen Nung is said to have enjoyed the fist cup of tea.  The Olmecs of the Gulf Coast of Mexico are said to have begun&#8230;<div
style=\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"clear:both\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"></div> <a
href="http://tweakfit.com/energy-drinks-caffeine-supplementation" class="read_more">Read the rest &#187;</a></p><p><hr
/> <a
href="http://tweakfit.com/energy-drinks-caffeine-supplementation">Energy Drinks and Caffeine: Safety and Effectiveness</a> is a post from TweakFit. TweakFit is a <a
href="http://tweakfit.com">fitness</a> blog dedicated to helping people get healthy and fit through proper exercise, nutrition, and injury maintenance.<br
/> <small><strong>Make sure you consult your doctor before attempting anything mentioned on this blog post.</strong><br/> Copyright © TweakFit 2009-2012. <br/> This feed is for personal, non-commercial use only. <br
/> The use of this feed on other websites breaches copyright. If this content is not in your news reader, it makes the page you are viewing an infringement of the copyright. <a
href="http://tweakfit.com/terms-of-use/">View full terms of use</a>.</small></p>]]></description> <content:encoded><![CDATA[<p><strong>HISTORY</strong></p><p>Caffeine is a drug that is present in the beans, leaves, or fruit of over 60 plants.  It is also one of the main ingredients in the <a
href="http://tweakfit.com/how-to-lose-weight-fast-eca-stack/">ECA stack</a>. History of it&#8217;s use by humans dates back to 2737 B.C. in China, when Emperor Shen Nung is said to have enjoyed the fist cup of <em>tea</em>.  <a
href="http://cdn.tweakfit.com/wp-content/uploads/2010/02/coffee_beans.jpg"><img
class="alignright size-full wp-image-787" title="coffee_beans" src="http://cdn.tweakfit.com/wp-content/uploads/2010/02/coffee_beans.jpg" alt="" width="150" height="102" /></a>The Olmecs of the Gulf Coast of Mexico are said to have begun cultivating the <em>cocoa</em> tree by around 1000 B.C.  And the <em>coffee</em> bean was discovered around 900 A.D. by a shepherd in Ethiopia, after noticing that his animals became particularly energetic after eating the berries of a coffee plant.  Now, 1,100 years later, Americans consume an average of 400 million cups of coffee per day!</p><p>In recent years the energy drink market has become a multi-billion dollar industry, with more than 30% of American <a
href="http://cdn.tweakfit.com/wp-content/uploads/2010/02/images.jpeg"><img
class="alignleft size-full wp-image-788" title="images" src="http://cdn.tweakfit.com/wp-content/uploads/2010/02/images.jpeg" alt="" width="133" height="109" /></a>adolescents using these supplements regularly.  Energy drinks are the most popular supplement being used by young people and athletes today.  Red Bull began as an adaptation of a Thai energy drink, and was first released in Austria in 1987.  It was later released in the United States in 1997, and in it&#8217;s wake, many other energy drink brands emerged, such as AMP, Monster, Redline, and Rockstar.   People often question the safety and effectiveness of energy drinks and caffeine.  I will address these two issues, and provide evidence based on the latest research.  My goal is not to necessarily answer the questions, but to provide information to you, the consumer, so that you can make an educated decision.</p><p><strong> </strong></p><h3><strong>ARE ENERGY DRINKS SAFE?</strong></h3><p>The primary active ingredient in energy drinks is caffeine.  Caffeine is a mild stimulant with many physiological and psychological effects, such as: increased heart rate, increased metabolic rate, elevated mood, decreased fatigue and drowsiness, and increased alertness.  Some negative consequences of caffeine use (usually excessive) include insomnia, nervousness, headache, tachycardia (rapid heart rate), diarrhea, and anxiety. Recent studies have suggested that caffeine <em>does not</em> increase dehydration or impair thermoregulation, two widely held beliefs.  More research needs to be done to validate these results.  When combined with alcohol, caffeine can affect the heart, and people who are predisposed to cardiac conditions such as arrythmias may increase their risk of a devastating cardiac event.</p><p>Most people don&#8217;t know or don&#8217;t pay attention to the amount of caffeine in energy drinks.  Let&#8217;s put it into perspective.  Soda manufacturers are allowed to put up to 71 milligrams (mg) of caffeine into a 12-ounce <a
href="http://cdn.tweakfit.com/wp-content/uploads/2010/02/images-3.jpeg"><img
class="alignleft size-full wp-image-810" title="images-3" src="http://cdn.tweakfit.com/wp-content/uploads/2010/02/images-3.jpeg" alt="" width="110" height="137" /></a>serving.  An average 12-ounce can of Coca-Cola has approximately 34.5 mg of caffeine in it.  Depending on how drip coffee is prepared and on the size of the serving, you can bet on between 65 &#8211; 200 mg of caffeine per cup of joe.  Energy drinks generally fall into this range of 65-200 mg/serving, such as Red Bull with 80 mg caffeine per serving.  Rockstar and Monster also contain 80 mg caffeine/serving, but they contain 2 servings per can.  There are  energy drinks, such as Celsius and JavaFit Energy Extreme, that exceed 200 mg/serving.</p><p>If you are a coffee drinker this doesn&#8217;t sound like too much caffeine.  But there is much more to energy drinks than caffeine.  Red Bull contains 27 grams of sugar per serving (unless you buy sugar-free Red Bull of course).  Monster also contains 27 grams sugar/serving, but there are 2 servings in each can!  Rockstar contains 30 grams sugar/serving (x 2).  Sugar is a carbohydrate that adds empty calories to your diet and also poses potential problems for blood sugar regulation.</p><p>Aside from caffeine and sugar, there are many other ingredients in these energy drinks.  Some of these ingredients include <a
href="http://en.wikipedia.org/wiki/Taurine">taurine</a>, <a
href="http://en.wikipedia.org/wiki/Guarana">guarana extract</a>, <a
href="http://en.wikipedia.org/wiki/Green_tea_extract">green tea leaf extract</a>, <a
href="http://en.wikipedia.org/wiki/Evodiamine">evodiamine</a>, and many others that have been heavily researched.  However, many ingredients being used in energy drinks have not undergone such extensive research, and therefore should be approached with caution.  Also, the effects of a particular ingredient, such as caffeine, in isolation may not be equivalent to it&#8217;s effects when added to other ingredients (it&#8217;s effects may be enhanced or dulled-down).  An example of this is the enhancement of caffeine&#8217;s effects in combination with ephedra (<a
href="http://altmedicine.about.com/od/consumerreviewsalerts/a/ephedra_ban.htm">but we saw how that turned out</a>).  More research needs to be done in the area of in ingredient interaction.</p><p>Lastly, and redundantly, caffeine is a <em>drug</em>.  Issues associated with this include issues of dependence, withdrawal, and tolerance.  These issues have been studied with regards to caffeine itself, but not directly with regard to energy drinks.  Symptoms of caffeine withdrawal include headache, tiredness/fatigue, sleepiness, and irritability.  Because caffeine is the primary ingredient in energy drinks, it is reasonable to assume that this can occur with habitual use of energy drinks as well.</p><p><strong> </strong></p><h3><strong>ARE ENERGY DRINKS EFFECTIVE?</strong></h3><p>The answer to this question depends upon further clarification.  Previous research in this area has focused on caffeine by itself, but recent research has studied many different energy drinks.  I will not differentiate between energy drink brands in this article.</p><p><em>With regards to athletic performance: </em></p><ul><li>Energy drinks are effective in enhancing alertness (concentration and memory), focus, and reaction time to various stimuli.  They can decrease an athlete&#8217;s perception of effort.<a
href="http://cdn.tweakfit.com/wp-content/uploads/2010/02/images-1.jpeg"><img
class="alignright size-full wp-image-809" title="images-1" src="http://cdn.tweakfit.com/wp-content/uploads/2010/02/images-1.jpeg" alt="" width="101" height="135" /></a></li><li>Energy drinks are effective in increasing exercise endurance and improving the quality of a resistance training workout.  This means that the time to fatigue and the volume of activity performed is increased.  However, energy drinks <em>are not</em> effective at increasing power or strength, such as increasing your 1-repetition maximum (a common measure of strength).</li><li>Recent evidence suggests that caffeine may play a role in recovery from a workout and help decrease pain and soreness, but more research is needed to validate these results.</li><li><strong>Recommendation for use</strong><strong>:</strong> Check with a physician before using caffeine as an ergogenic aid, especially if you have any cardiac risk factors.  Caffeine enters the blood stream within 15-45 minutes and it&#8217;s effects last between 2.5 and 7.5 hours.  It is most beneficial to ingest the caffeine between 30 -60 minutes before a workout.  Dosages of caffeine should not exceed 6 mg/kg body weight (2.2 lbs) in those not sensitive to caffeine.  Ergogenic effects have been observed with dosages ranging from 2 to 6 mg/kg body weight.</li><li>Caffeine is a banned stimulant at urinary levels of 12 micrograms/milliliter and over for any athlete competing in National Collegiate Athletic Association or International Olympic Committee events.</li></ul><p><em>With regards to weight loss: </em></p><ul><li>Energy drinks have been shown to increase fat expenditure and enhance fat utilization.    Caffeine alone has been shown to be effective in enhancing lipolysis (breakdown of fat), fat oxidation (breakdown and use of fat for energy), and reducing glycogen breakdown.  Also, consumption of energy drinks has been shown to increase caloric expenditure during activities.  Other indicators of weight loss such as body mass, body fat, insulin sensitivity, and lipid profiles have been shown to decrease as a result of consuming energy drinks.</li><li><strong>Recommendation for use: </strong>Check with a physician before using caffeine as a dietary supplement, especially if you have any cardiac risk factors.  Research has shown that consuming 2 mg of caffeine per kilogram of body weight (2.2 lbs) can increase your resting energy expenditure (the amount of calories you burn at rest).</li></ul><p>*All evidence from the February issue of the National Strength and Conditioning Association&#8217;s <em>Strength and Conditioning Journal</em></p><p><strong> </strong></p><h3><strong>BUYER BEWARE</strong></h3><p>As a final word of warning, the Food and Drug Administration (FDA) does not regulate the supplement industry in the same way that they regulate conventional food and drug products.  <a
href="http://cdn.tweakfit.com/wp-content/uploads/2010/02/images-2.jpeg"><img
class="size-full wp-image-808 alignleft" title="images-2" src="http://cdn.tweakfit.com/wp-content/uploads/2010/02/images-2.jpeg" alt="" width="115" height="110" /></a>Under the Dietary Supplement Health and Education Act of 1994, supplement manufacturers are responsible for ensuring the safety of their product.  Manufacturers are not even required to receive FDA approval before producing or selling a product.  They are simply required to label their products in a &#8220;truthful manner that is not misleading&#8221;.  The FDA is only responsible for taking action against an unsafe supplement after it reaches the market.  Because the FDA is not involved in safety regulations before dietary supplements reach the market there is the possibility that some of these supplements are unsafe.  There is also the possibility of the manufacturer fabricating the ingredients and potential benefits.  <em>If you choose to use dietary supplements of any kind, it is important that you find a company with a good reputation that you can trust.  Proceed with caution!</em> If you are just looking to lose a few pounds, it might be better for you to find other safer alternatives, such as incorporating <a
title="Incorporate These Natural Fat Burning Foods into Your Meals" href="http://tweakfit.com/natural-fat-burning-foods/">food that burns fat</a> into your diet.</p><p><hr
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