Two different types of muscles such as cardiac muscles (heart) and skeletal muscles are found in our body. We will discuss here exclusively about skeletal muscles. Skeletal muscle is the most adaptable tissue in the human body. It is composed of thread-like myofibrils and sarcomeres that form a muscle fiber and are the basic units of contraction. 650 skeletal muscles are found in the human body. Muscle growth is known as muscle hypertrophy. Muscle hypertrophy contains time and is relatively slow for the majority of people. Visible growth is seen after several weeks or months as most initial changes are due to the ability of our nervous system to activate our muscles. This article tells us the mechanisms of muscles growth. …show more content…
Growth hormones or hormone-like compounds stimulate satellite cells to produce the gains in the muscle fiber size largely responsible for muscle growth and repair because of their role in regulating satellite cell activity. Insulin Growth Factor (IGF)-1, in particular Mecho-Growth Factor (MGF) and testosterone are the two most vital mechanisms that promote muscle growth. Testosterone is the main hormone that works out with weights. Men have more testosterone than women, which allows them to build bigger and stronger muscles. Most testosterone is bound in the body and therefore not available to use (up to 98%), strength training seems to help not only release more testosterone, but also make the receptors of your muscle cells more sensitive to your free testosterone. The IGF regulates the amount of muscle mass growth by increasing protein synthesis, facilitating glucose uptake, repartitioning the uptake of amino acids (the building blocks of protein) into skeletal muscles and once again, activates satellite cells to increase muscle