Amino Acids and Exercise: How They Can Improve Performance and Endurance

March 23, 2023
Amino Acids and Exercise: How They Can Improve Performance and Endurance

Essential amino acids are a group of nine amino acids that the human body cannot synthesize on its own and must therefore obtain them from the diet. The nine amino acids are: Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, Valine, These amino acids are considered "essential" because they are necessary for protein synthesis and other important functions in the body, but the body cannot make them on its own. It is important to consume foods that contain all nine essential amino acids to maintain optimal health and prevent deficiencies. Foods that are good sources of essential amino acids include meat, poultry, fish, eggs, dairy products, and plant sources such as quinoa, soybeans, and nuts.

Amino acids are the building blocks of protein and play a key role in building and repairing muscle. When it comes to exercise, certain amino acids can help improve performance and endurance by providing the body with the essential nutrients it needs to build and maintain muscle tissue. Here are some examples: 

  1. Branched-chain amino acids (BCAAs): Leucine, isoleucine, and valine are three BCAAs. They are essential amino acids, meaning that the body cannot synthesize them and must be obtained through diet or supplements. BCAAs are especially important for athletes and bodybuilders because they help stimulate muscle protein synthesis and reduce muscle breakdown. Research suggests that taking BCAA supplements before and during exercise can help improve endurance, reduce fatigue, and increase muscle mass. 
  2. Glutamine: Glutamine is a non-essential amino acid that plays a key role in muscle regeneration and repair. During intense exercise, muscle glutamine stores can be depleted, leading to muscle breakdown and fatigue. Glutamine supplementation can help prevent this and improve recovery time between workouts.
  3. Carnitine: Carnitine is a non-essential amino acid that plays a key role in fat metabolism. It helps transport fatty acids into the mitochondria, where they can be used to produce energy. By increasing the availability of fatty acids, carnitine can help improve endurance during exercise. 
  4. Beta-Alanine: Beta-Alanine is a non-essential amino acid that helps increase muscle carnosine levels. Carnosine acts as a buffer in the muscles, helping to reduce the accumulation of lactic acid and delaying the onset of fatigue during exercise. Beta-alanine supplementation has been shown to improve endurance and increase muscle strength.


    Amino acids play a key role in building and repairing muscle. When taken as a pre-workout supplement, amino acids can provide several benefits, including:

    1. Increased muscle protein synthesis: Amino acids are the building blocks of protein and play a key role in muscle protein synthesis. Consuming amino acids before training can increase muscle protein synthesis, leading to better muscle growth and recovery.
    2. Reducing muscle breakdown: Amino acids can help prevent muscle breakdown during intense training. This is because they provide the body with the necessary nutrients to fuel the muscles, thereby reducing the breakdown of muscle tissue.
    3. Improved Endurance: Amino acids such as branched-chain amino acids (BCAAs) can help delay muscle fatigue during exercise. This can improve endurance and allow you to train harder for longer.
    4. Reduced muscle soreness: Amino acids can also help reduce muscle soreness and inflammation after a workout. This can help speed up your recovery time and allow you to return to training sooner.
    5. Improved mental focus: Certain amino acids, such as tyrosine, can improve mental focus and alertness. This can help you stay focused and motivated during exercise, leading to better results.


    Essential amino acids are those that the body cannot synthesize and must obtain from the diet. Although it is recommended to obtain essential amino acids through a balanced diet, some people may choose to use supplements.

    Essential amino acid supplements are usually available in powder or capsule form and may contain all nine essential amino acids or only specific ones. It is important to note that the quality and effectiveness of these supplements can vary greatly depending on the manufacturer and source of the amino acids.


    In conclusion, amino acids play a vital role in muscle building and regeneration and can be used to improve performance and endurance during exercise. However, it is important to consult with a healthcare professional before starting any new supplementation regimen to make sure it is safe and effective for you. Overall, amino acids can provide several benefits when taken as a pre-workout supplement. However, it is essential to consult a healthcare professional or registered dietitian to determine the correct dosage and ensure it is safe for you.

    Back to blog