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).
Weighted reverse leg curls primarily work your buttocks and hamstring muscles. Consult with a personal trainer to determine if this exercise is appropriate for your level of fitness and strength, and ask your doctor about how weight training might benefit you.everse leg curls work your gluteal and hamstring muscles. Photo Credit Thinkstock/Comstock/Getty Images. Exercising muscles with weights provides a variety of health benefits to adults regardless of age.