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.
Fiber Types and Skeletal Muscle Hypertrophy The force generated by a muscle is dependent on its size and the muscle fiber type composition. Skeletal muscle fibers are classified into two major categories; slow-twitch (Type 1) and fast-twitch fibers (Type II).
I will explain exactly what these are in a moment. The percentages of these different fiber types that your muscles are made of can help you determine exactly how you should train each particular muscle group in your body. The Different Muscle Fibers. Slow Twitch: These are also known as Type 1 or red muscle fibers.