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.
Ia sensory fiber response. Stretch alone: small dynamic response to muscle. stretch, a moderate increase in steady-state firing. Static gamma motor neuron stimulated: steady-state. response increase, dynamic response decrease. Dynamic gamma motor neuron stimulated: dynamic. response markedly enhanced, steady-state response. gradually returns to original level. Increase in activity of dynamic gamma motor neurons. increase the dynamic sensitivity of the type Ia endings. but have no influence on the type II endings.