it starts to break down muscle
not on its own, you need to lift weights to break down muscle protein rebuilds the muscle once its broken
When working out, you stretch the muscle and break it down. Then by adding protein and amino acids the muscle will repair it self stronger than before.
Protein is important for muscle growth and repair because it provides the essential amino acids needed for building and maintaining muscle tissue. When you exercise, muscle tissues break down, and protein helps to repair and rebuild these tissues, leading to muscle growth and strength. Consuming an adequate amount of protein in your diet can help support muscle recovery and overall muscle health.
muscle fibers
Meat tenderizers contain enzymes such as papain and bromelain that break down proteins in the meat. These enzymes target the muscle fibers and connective tissues, making the meat softer and more tender by breaking down the protein structure.
Myoglobin is broken down by enzymes called proteases, including calpains and cathepsins, after muscle damage. These enzymes break down the myoglobin protein into smaller peptides and amino acids for recycling or excretion from the body.
No, you need protease to break down meat.
The stomach uses the enzymes to break down foods.
I don't think they are stored. Obviously they are used to make structures such as muscle. If there is a dietary shortage of protein muscle can be broken down to provide amino acids. I have been told that small amounts of muscle tissue may break down in the short period of overnight fasting, and that this has encouraged dieticians to stress the importance of breakfast. I cannot give references for this and frankly consider it should be treated with caution.
Lack of attention (maintenance) causes break downs.
Protein