From Memprotein Wiki
The use of pre-workout supplements and powders is a relatively new concept. Everything started when enterprising individuals chose to combine the now popular ECA stack - ephedrine, caffeine and aspirin. Ephedrine and caffeine because both promoted fat loss and build-up and aspirin since it sped up the process of delivery and voila! Pre-workout supplements were born also it wasn't long before bodybuilders popularized the mix like fish to water. Additional and more in-depth research contributed further to its credibility and has elevated it to the position it now enjoys among the essential elements in bodybuilding.
For first timers in the realm of muscle building, pre-workout supplements are specially designed to improve performance, increase strength, endurance, muscle breakdown during training and metabolism. More importantly, it will help accelerate nutrient delivery and creates the best possible hormonal environment. If you select the right pre-workout supplements, they help you "get into the zone" and invite you to do a lot more than your usual quantity of reps.
Deciding on the best pre-workout supplements depends upon what you want to achieve as far as your fitness goals are concerned. When you want more strength, you will want to select supplements that have creatine monohydrate and taurine. Creatine is one of the most popular supplement ingredients because it helps maximize strength and muscle growth. During training, ATP or adenosine triphosphate may be the only energy source that the body can tap for muscle contraction and since the muscles can only store enough ATP to permit muscle contractions for some seconds, they have to replenished. Creatine is what your body uses to exchange ATP so that you can go on with your sets.
Taurine on the other hand, is an protein produced from cysteine but unlike other proteins. It doesn't just incorporate itself into proteins, but is also involved in various physiological processes including muscle contraction, fluid balance control, cell membrane structure and is also a great antioxidant.
If you are after muscle growth, the main concern for most bodybuilders, then you need to choose supplements with the BCAAs, whey protein and carbohydrates. BCAAs, or branched chain proteins are composed of three elements - leucine, isoleucine and valine. They assist reduce muscle tissues breakdown but new information shows that in addition, they are also able to keep elevated testosterone levels and increase insulin levels, insulin as being a highly anabolic hormone which aids in reducing muscle tissues breakdown.
Whilst not usually regarded as a pre-workout essential, pure whey protein has been shown to increase protein synthesis and is helpful in preventing the catabolic effects of training, along with the quick digestion of nutrients. It is best taken before and after training. Carbohydrates however, have a big impact on muscle growth and gratifaction. Whenever your body melts away its ATP stores, it switches to presenting glycolysis which are carbohydrates stored within the muscles, together with blood sugar to exchange these ATP stores. You remain strong on your workouts and are able to do your reps without any problems whatsoever.
One important tip to remember when utilizing pre-workout supplements is to change it up from time to time. Cycling your supplements off allows your body to re-sensitize itself so the supplements work better. Just like a diet regimen, you need to make a few adjustments every now and then so that your workout goals continue being achieved instead of halted.