Magazine
the only blog where performance is discussed in detail
Sports nutrition
L-glutamin je neesenciální aminokyselina, která je v lidském těle zastoupena v největším množství – tvoří nejhojnější podíl volných aminokyselin jak v kosterním svalstvu, tak v krevní plazmě. Častokrát se této aminokyselině jako doplňku stravy připisují anabolické a imunostimulační vlastnosti, jak se ale na to dívá moderní sportovní věda?
Tryptophan (abbreviated Trp) is one of the 20 amino acids commonly found in proteins and belongs to the group of indispensable (essential) amino acids, meaning that the human body cannot produce it on its own and must obtain it through diet. In the body, tryptophan plays an important role not only as a building block for muscles, but primarily as a key precursor to substances affecting our brain and perception of fatigue.
Tyrosine is a non-essential amino acid that the human body can synthesize from the essential amino acid phenylalanine. In sports nutrition, it is known as a dietary supplement that can affect our ability to react to stress and maintain mental alertness. Although there is scientific evidence supporting this claim, L-tyrosine supplementation is not entirely without risk.
Ornithine is a non-proteinogenic amino acid, which means it is not typically used for muscle protein synthesis but plays a crucial role in metabolism. In the body, it is closely related to arginine and the urea cycle, where it helps remove toxic ammonia. In the world of sports nutrition, it has become popular primarily due to claims that it can naturally stimulate the hormonal system.
Glycine is a non-essential amino acid, which, in terms of chemical structure, is the simplest of all 20 amino acids commonly found in proteins. Although the body can synthesize it itself, it plays several specific and indispensable roles in an athlete's body. However, is its supplementation significant for athletic performance?
Taurine is a non-proteinogenic amino acid and a derivative of the amino acid cysteine, which has become a very popular ingredient in many sports and energy drinks in recent decades. Although it is found in the human body in high concentrations in the brain, heart, and muscles, its exact role still remains partially a mystery to science.
L-citrulline is a non-essential (not necessary to be consumed in food) non-proteinogenic (not a building block for muscles) amino acid that occurs in human diet only in small quantities. Its main natural source is watermelon, but the body can also synthesize it itself. In the field of sports nutrition, citrulline has gained great popularity due to its ability to increase arginine levels in the body and support nitric oxide (NO) production.
D-Aspartic Acid (DAA), found in the body in the form of aspartate, is an amino acid that is often presented as a means to increase energy and delay fatigue. But what does modern sports science really say about it?
