Normal levels of creatinine in the blood are approximately 0.6 to 1.2 milligrams (mg) per deciliter (dL) in adult males and 0.5 to 1.1 milligrams per deciliter in adult females. Muscular young or middle-aged adults may have more creatinine in their blood than the norm for the general population.
Types of muscle fibers. Skeletal muscle, the type that is responsible for moving our muscles when we run, is comprised of three different muscle fiber types, each with its own advantages, disadvantages, and specialty.
When you work out you do a little damage to the fiber of the muscles, and that causes them to feel sore when they heal. There are, however, things you can do to help lessen the effects or prevent sore muscles, such as eating very specific types of foods to help strengthen your bodyâs ability to heal.