Sports people, whether they are athletes or the elderly, desire to have developed muscle tissue. Muscles provide strength to support exercise, so the growth of muscle protein synthesis is a goal pursued by people of any age. But it is worth noting that the growth of muscle tissue is also affected by the decomposition rate of muscle protein, which may be caused by changes in muscle protein synthesis. Most athletes may have realized the benefits of consuming protein to increase muscle protein synthesis. Literature studies have shown that the branched chain amino acid, leucine, is one of the important amino acids that stimulate the growth of muscle protein. Soy protein is rich in leucine, which is very effective in improving muscle protein.
Soybeans have also been shown to increase muscle tissue more effectively than carbohydrate foods, comparable to whey protein. In one study, researchers provided whey protein, soy protein, or placebo to 26 untrained healthy men and women. Regardless of protein source, compared with isocaloric placebo, protein supplementation in resistance training can increase and strengthen muscle tissue.
In a double-blind randomized trial, Reddy and his colleagues sought to see if soy protein and milk protein would be more beneficial. Research subjects include high-intensity leg resistance training, and provide whey protein (18g) or a mixed protein of soy protein and milk (19g) after training. The two beverages contain enough essential amino acids (8.6 grams) for the human body to maximize the separation and synthesis rate. The conversion of dietary protein into muscle protein or similar efficacy is used as a measurement standard. It is found that compared with whey protein, consumption of a mixture of soy and dairy products Protein, the protein part of the muscle recovery period after exercise has a slower synthesis rate.