Muscle use the movement of actin against myosin to create contraction. In skeletal muscle, contraction is stimulated by electrical impulses transmitted by the nerves, the motoneurons (motor nerves) in particular. Cardiac and smooth muscle contractions are stimulated by internal pacemaker cells which regularly contract, and propagate contractions to other muscle contractions are facilitated by the neurotransmitter acetylcholine.
Muscle hypertrophy is an increase in the size of a muscle through an increase in the size of its component cells. It differs from muscle hyperplasia, which is the formation of new muscle cells. Depending on the type of training, the hypertrophy can occur through increased sarcoplasmic volume or increased contractile proteins
Muscle grows best when they have a good internal environment — quality muscle tension during exercise, adequate fuels, protein building blocks, enough rest to recover from hard work, and ample amounts of anabolic hormones.
The keys to the anabolic trigger include hard work, maximizing anabolic hormone levels, providing adequate nutrients for muscle growth, and giving muscles enough rest to recover optimally. Follow these simple procedures and you will create an ideal internal metabolic environment that will help muscles grow:
These "anabolic triggers" are related to each other. If muscle chronically works too too hard, anabolic hormones become suppressed, muscle and liver carbohydrate stores become depleted, and proteins break down. If muscle works hard, but gets enough rest, muscle builds cell receptors that make anabolic hormones work better, suppresses catabolic hormones, build s protein, and maximizes carbohydrate stores in tissues. Some of the biological factors, cross education, exercies, insulin, rest, timing to eat, protiens, creatine phosphate and some minlerls like chromiun, boron, vanadium and HMB are major strategiecal facttors for a good muscle growth.