If you want to make achievements in fitness, or just use it as a talk, then you should know some basic fitness theory knowledge. For example, the muscle composition of our body and how fat is "gone" need us to understand.

Know enough fitness knowledge so as not to become reckless in the fitness circle. Fitness people should not only think about building muscles, but also know the doorways of fitness, otherwise they will be laughed at as "stupid". If you don't even know some basic theoretical knowledge, then you probably practiced it yourself, which is a serious "practice disability".

2. Common fitness theory

The first classification of muscles

Everyone knows that one of the purposes of fitness is to practice muscles, so what are muscles?

According to the different parts of "upper limbs, trunk, core and lower limbs", we divide the muscles into brachialis, biceps brachii, triceps brachii, deltoid, pectoralis major, latissimus dorsi, trapezius, rhomboid, erector spinae, rectus abdominis, gluteus, quadriceps femoris, hamstring, adductor muscles and so on.

Generally, when we do dumbbell bending, the main exercise is the second head of humerus; When lifting dumbbells, the main exercise is the chest muscles. Of course, a fitness program is often not only aimed at a certain part of the muscles, such as barbell bench press, which can not only exercise our chest muscles, but also exercise three heads at the same time. Moreover, the same instrument stimulates different muscle parts with different grip methods and different grip distances.

The second classification of muscles

Muscles of human body can be divided into three types according to their functions and shapes. The first is the myocardium, which is located in the heart and is responsible for all kinds of work of the heart; The second is smooth muscle, which is not directly controlled by the body; The third kind is skeletal muscle, which is attached to the surface of bone, that is, the part we usually call muscle that needs our exercise.

fat metabolism

Fat metabolism is an important and complex biochemical reaction in the body, which refers to the process of digestion, absorption, synthesis and decomposition of fat in the organism with the help of various related enzymes, and it is processed into substances needed by the body to ensure normal physiological functions, which is of great significance to life activities. The products of fat metabolism in the human body are: carbon dioxide, water, and many nitrogen-containing substances, such as ammonia, so excreta will stink.