Understanding the Muscles
There are three types of muscles in the body: the heart muscle, smooth muscle and skeletal muscle. Our focus will be on the site of skeletal muscle in particular.
Skeletal muscle :
And involuntary muscles to bones are connected by connective tissue, the basic function of moving the bones, which in turn causes the body to move their limbs.
Resides in the structural muscle of the human body 300, the muscle of a large number of packets containing muscle fibers, muscle fibers are composed of unit construction in muscle and consists of a large proportion of the protein, the functional unit is muscle cells and nerve fibers.
Two types of muscle fiber bundles are responsible for muscle contraction:
- Myosin and systolic thick bundles are short.
- Actin and actin bundles are high systolic long.
When performing any involuntary movement in the body of the nervous system sends a message to the neurons in the muscle motor units and muscle fibers Banaqbad ordered to perform this movement, contraction Pettm by the overlap between actin and myosin support packages calcium stored in the muscle.
It is worth mentioning that you can not separate the part of single muscle, nervous system Valjhaz sends a message to all neurons in the muscle and the muscle to help in this movement.
Types of muscle contraction:
- Constriction Aloizumitrick (isometric contraction):
And it is a muscle contraction without the palace is through the constant presence of the constriction.
An example of contraction Aloizumitrick: show of force as it does for bodybuilders.
Types of muscle contraction:
- Constriction Aloazotonak (isotonic contraction):
And it is a contraction in the muscle leads to the palace under stress.
Aloazotonak constriction divided into two types:
- Positive Contraction (Concentric Contraction):
Palace contraction occurs when the muscle to overcome resistance.
Example: Aldambalz likely Baacepc on the bright side.
- Contraction negative (eccentric contraction):
Constricting muscle extension passes overcome resistance.
Example: Aldambalz likely Baacepc on the negative side.
The types of muscle fibers:
There are two types of muscle fibers:
1. fast twitch muscle fibers :
And are the muscle fibers contract quickly to give a great strength for a short time, and is the larger of the fiber in the muscle and the largest proportion of these fibers when the person has increased its relative success in endurance sports, and body building.
2. slow twitch muscle fiber :
And that is the fiber to contract slowly and endure long periods of work in medium voltage, these fibers are used in cardio and resistance exercises, and the greater the proportion of these fibers to the person increased success in sports Kalmarzn resistance ratio.
Clarify the anatomical drawing of the main skeletal muscle in the sport of bodybuilding:
