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).
With the Weider Iso-Tension Training Principle, work your muscles without weights. Written by FLEX Staff. Muscles are comprised of fibers composed of myofibrils that make contact with each other during muscle contractions. The strength of the contraction depends on the number of fibers and the tension within each fiber.