Optimum Nutrition Gold Standard Pre-Workout Energy Shot, Ready to Drink Food Supplement with Beta Alanine, Caffeine, PerforMelon Boost and Vitamin B6 and B12, Mixed Berry Flavour, 12-Pack, 12 x 60 ml

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Shimomura, Y., Inaguma, A., Watanabe, S., Yamamoto, Y., Muramatsu, Y., Bajotto, G., ... & Mawatari, K. (2010). Branched-chain amino acid supplementation before squat exercise and delayed-onset muscle soreness. International Journal of Sport Nutrition and Exercise Metabolism, 20(3), 236-244.

The most common ingredients in today's popular pre-workouts include caffeine, beta-alanine, leucine or BCAAs, and nitric oxide boosters such as Nitrosigine, arginine, or citrulline, all of which appear to help increase blood flow and the "pump" feeling during lifting. However, new blends with new ingredients come out all the time. L-citrulline is the natural form of citrulline, found in watermelon. It helps boost nitric-oxide levels, which can help dilate your blood vessels to get more oxygen and nutrients to your muscles. As nutritional consultant Mike Roussell, Ph.D., notes in the article " Citrulline Malate: The Fatigue Fighter," it also plays a role in the removal of ammonia, a compound known to cause exercise-related fatigue, from your blood.Please be aware that for those who are caffeine-sensitive, it is best to avoid or limit caffeine intake after 4 p.m. (assuming you are not an overnight worker), as it may interfere with sleep or sleep quality. For those who are caffeine-sensitive and train at night, non-caffeinated products are likely a better option. 2. BCAAs or EAAs And that’s not all! There’s 2g of beta-alanine, 2g of AAKG, and 3g of creatine monohydrate shown to increase physical performance in successive bursts of short-term, high-intensity exercise. 2 Outlaw, J. J., Wilborn, C. D., Smith-Ryan, A. E., Hayward, S. E., Urbina, S. L., Taylor, L. W., & Foster, C. A. (2014). Acute effects of a commercially-available pre-workout supplement on markers of training: a double-blind study . Journal of the International Society of Sports Nutrition, 11(1), 40.

The effects that some of the ingredients may have can vary from person to person, so it may be worth experimenting with the timing of taking your supplement to work out when it’s best for you.It’s generally best not to regard supplements as ‘magic pills’ or ‘magic powders’ that will work without any effort on your part. Mængden af L-Glutamin: Pre-workouts kan være hårdt for maven, glutamin kan hjælper med fordøjelsen og oppustethed. Der skal være omtrent 300 mg glutamin i preworkouts. Glutamin kan købes seperat, MyProteins L-Glutamin Aminosyre er et godt bud. Pre-workouts can be divided into two groups: those with stimulants, and those without. The stimulants pretty much always include caffeine, in widely varying doses, but may include other stimulants including yohimbine, theacrine (Teacrine as the most common), guarana, and many others. Many supplement companies have developed stimulant-free pre-workouts for those who are sensitive to caffeine, simply don't want it, or who exercise close to bedtime.