After the sugar in the body is consumed, the body begins to consume fat. After the process of consuming fat takes a long time, the body will also start to activate the protein tissue in the muscle as the body's spare energy to perform the body's operation. However, after the protein in muscle fibers is reduced, the size of muscle will also become smaller, the ability of muscle will also decrease, and the body will become thinner. If we can master the difference between fat and muscle consumption time, we can use fat as energy consumption in the process of muscle tissue not participating in consumption as much as possible, and we can get the effect of increasing muscle and reducing fat, but mastering this process is not simple, and everyone's metabolic process is different.
There are also some tentative knowledge about muscles, as follows:
Muscle is not only the source of human power, but also an important source to promote human metabolism and an important factor to keep the heart young. But to understand this problem thoroughly, we must first understand the function and function of muscles;
Muscles act as the power source and shock absorber of the body. But strangely, most people seem to be afraid of growing too many muscles. In fact, they should worry that they will lack enough muscles to maintain their body functions. If the human body does not regularly carry out resistance training, it will lose about 2.5 kilograms of muscle every 10 year after the age of 25. Due to the decrease of muscle mass, the metabolic rate of human body also decreases, about 5% every 10 year. If you keep your usual calorie intake, you will consume too many calories, and the accumulated calories will be converted into fat. With the loss of muscles and the accumulation of fat, your appearance and physical condition will decline. Men and women who don't do resistance training will lose 0.227 muscles every year. The gradual decrease of muscle is the main reason why the metabolic rate drops by 0.5% every year.
Therefore, resistance training is the best way to maintain muscle mass and metabolic function after middle age. Because resistance exercise can increase our metabolic needs and reduce fat more effectively. A person who has to sit and work all day needs to use certain muscle strength during the day. According to the research results, a person just sits at his desk from 9 am to 5 pm, and our neck will support 5 to 6 kilograms of head all day. Continuous muscle contraction will cause obvious muscle fatigue, which will lead to shoulder and neck pain. After implementing the two-month progressive muscle strength training program, the muscle strength of the neck muscles can be improved by 45-60%, and the strong muscles can relatively reduce the burden on the neck. Therefore, having a good muscle state has an important influence on our daily life.
There are about 639 skeletal muscles in the human body, accounting for about 40% of the body weight. Muscle is mainly composed of muscle fibers (muscle cells). Many muscle fibers gather together, and the membrane wrapped with loose connective tissue forms a muscle bundle, and many muscle bundles are wrapped together by connective tissue to form a muscle.
Muscle shapes are varied and can be roughly divided into four types: long muscle, short muscle, platysma muscle and orbicularis oris muscle. Long muscle is usually spindle-shaped, mostly distributed in limbs, which causes great movement when contracting. Short muscle is short in shape, mostly distributed in the deep part of trunk, and its movement amplitude is small during contraction. The platysma muscle is flat, thin and wide, mostly distributed in the chest, abdominal wall and superficial layer of back, which not only causes the movement of trunk due to contraction, but also plays a role in protecting internal organs. The orbicularis oris muscle is annular, distributed around the hole and fissure, and can be closed when contracting, such as the muscle around the mouth.
The middle part of the muscle is soft and elastic, which is called muscle abdomen and has contractility. Both ends of the muscle abdomen are tendons, which are composed of connective tissue and have no contractility. Tendons are white and tough and attached to bones. The tendon of platysma is membranous, called aponeurosis.
Muscles usually attach to two or more adjacent bone surfaces, span one or more joints, and cause joint movement when contracted. The fixed end of the movement is called the starting point, and the moving end is called the stopping point. But the starting point and the ending point are relative, and they can often be interchanged with the change of movement. For example, pectoralis major starts from the anterior chest wall and ends at the humerus. Its function is to adducte and bend the upper arm. However, when climbing, the humerus is fixed, and a pull-up action is formed due to the translocation of the starting point and the ending point of the pectoralis major muscle.
2. Contraction characteristics of muscles When stimulated, muscles can contract, and muscle fibers become shorter and thicker, resulting in strength. All actions of human body are caused by skeletal muscle contraction affecting bones.
Any action of the human body can not be completed by one muscle or muscle group, but by multiple muscles or muscle groups. In the same activity of muscles, the same function is called synergetic muscle, and the opposite is called antagonistic muscle. For example, in the flexion and extension of the knee joint, the muscles of the flexor group act in concert, which is a synergistic muscle; The muscles of the extensor group are also coordinated, and they are also coordinated muscles; The functions of flexor and extensor are antagonistic to each other. The contraction of synergic muscle and antagonistic muscle is highly coordinated. For example, when you bend your knees, there are both the coordinated contraction of flexors and the relaxation of extensors, otherwise it is difficult to complete accurate and complicated movements. The coordination of muscle contraction and relaxation is achieved through the nervous system.
Therefore, if a person's muscles are atrophied or extremely underdeveloped, it will directly affect the metabolism of the human body, thereby damaging the normal function and life span of the human body. If when we were in Gai Lou, we only had steel bars (equivalent to human bones) and no cement (equivalent to human muscles), and only put some lime and mud on the outside of the steel bars, or even some low-grade cement, would this building be strong? No matter whether women are overweight or not, they always want to lose weight, preferring to lose muscle. Just for simple weight. When it comes to building muscles, I immediately flinch and say no, no, no, I don't want to build so many blocks! It's like saying "play basketball for a while", no! I don't want to play on the same level as Jordan and Kobe!
"The first element of muscle growth is androgen", that is to say, it is very, very difficult to grow muscle without a considerable amount of androgen in the body. Therefore, many middle-aged men are worried about their slow muscle growth during exercise. Women secrete 90% estrogen, about 7% progesterone, and the difference is androgen. What's more, how many muscles can a woman who only secretes 14% androgen grow? Therefore, women's muscle exercise will only increase the body's metabolism, and will never make the body tend to men. If a woman's height is1.65m and her weight is1.20kg, is she healthy? The answer is' basic health', but almost 100% of women are dissatisfied and definitely think they need to lose weight. If the muscles are reduced to 100 kg without training, at least half of them will be satisfied. So is this person with less than 20% muscle mass healthy? People with insufficient muscles are easily crushed by bones, such as cervical vertebrae, waist, shoulders and legs. Can a woman who is fat except for her bones be healthy? Can an unhealthy woman be beautiful? At present, many diseases of cervical vertebrae, lumbar vertebrae, shoulders and legs are actually the consequences of muscle deficiency. Because there is not enough muscle to support and protect bones, bones are overwhelmed and various bone diseases occur.
Health is the foundation of life. Only after health can we talk about beauty.
I hope it helps you!