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.
Stability Ball Leg Curls are the signature of most Gunnar Peterson celebrity workouts. Stability Ball Leg Curls work the butt, hips, thighs, and core. This exercise is also know as Swiss Ball Hamstring Curls. Not only do you give your hamstrings a good workout, but you work your core as well.