what a spritual power of mind

Since the time of ancient Greece, lifting weights or external loads has been practiced as a physical activity that stimulates muscle development and therefore strength. Hippocrates first explained what weight training was all about when he wrote: "Whoever uses this develops, and whoever doesn't use it is wasting his time from him." Progressive resistance training dates back to Ancient Greece; legendary figures such as wrestler Milo de Crotona trained by carrying a newborn calf on his back every day until it grew; with this example, we can see that they were drawing principles of sports training, such as load progression, consciously or unconsciously. Another Greek, the physician Galen, described strength training using barbells, an ancient form of dumbbells, for muscle development and body training. In the 1960s, exercise machines began to be implemented in gyms. Weight training rose in popularity in the 1980s due to heavy media influence because the cinema was a means by which they began to show off structurally strong and hypertrophied bodies. Since the 1990s, there has been a significant increase in the presence of women in gyms, the practice of lifting weights as a healthy physical activity, and the implementation of training programs. Many scientific works can provide evidence of the positive influence of prolonged training on the cardiopulmonary system (Hollmann & Hettinger, 1990). According to Banzer (1989), prolonged sports activity reduces the risk of coronary heart disease. In particular, there is talk of a halving of the risk of getting sick and a reduction of mortality by a third. Accordingly, health training in the form of resistance training is aimed at preventing cardiovascular problems. As early as the 1970s, Welsch, Harre, and Donath (1974) drew attention to the predominance of resistance training in leisure time and relaxation sports. In recent years, training aimed at developing muscle strength has been considered important for health and psychophysical performance capacity (Zimmerman, 2004). the bodybuilding It is an alternative physical activity generally based on physical exercise of medium-to-high intensity in order to find a muscular balance between body segments. Anaerobic stimuli are generally used, mainly developed in gyms. Muscle building is also known as activity that aims to hypertrophy the muscle without achieving competitive development. Bodybuilding, as weight training, causes induced changes in muscle fibers, such as microtraumas; these small lesions in the muscle contribute to fatigue after exercise. The repair of microtraumas is part of muscle growth, better known as hypertrophy. striated muscle formed by elongated and multinucleated cells or fibers that place their nuclei on the periphery. They are made up of actin and myosin proteins. The human body has more than 650 muscles, which constitute half of a person's body weight since approximately 40% are this type of muscle and 10% are cardiac and smooth muscle (Hansen & Koeppen, 2004). Muscles are masses of tough, elastic tissue that pull on our bones when we move. They form our musculoskeletal system, which allows us to carry out daily physical activities because they exert a traction action on the joints, causing body movement and also influencing the organism in developing other conservation and maintenance activities (Hansen, Koeppen, 2004). Muscles are the motors of movement, since they are a bundle of fibers whose most outstanding property is contractility, in addition to others such as excitability, extensibility, and elasticity. Due to contractility, the bundle of muscle fibers contracts when it receives the order from the motor neuron, and that is where excitability intervenes (Hansen & Koeppen, 2004). Muscle hypertrophy is the scientific name given to the phenomenon of growth in the size of muscle cells, which means an increase in the size of the muscle fibers and therefore of the muscle. Technically, it is the growth of muscle cells without there being a cell division, and the muscle subjected to this change also offers a better response to the load. There are two types of muscle growth, or hypertrophy: myofibrillar and sarcoplasmic. a. myofibrillar hypertrophy It is produced by the increase in myofibrils contained in the muscle fiber. By having more myofibrils, the cell widens, causing the muscles to also enlarge to a certain extent. The muscle becomes stronger and harder as its contractile units increase. This type of hypertrophy is achieved above all by training with heavy weights and low repetitions. In addition, this type of training is indicated to produce the neurological adaptation that induces the brain to recruit more fibers, increasing strength (Zimmerman, 2004). b. sarcoplasmic hypertrophy It is due to the increase in the amount of fluid contained in the muscle fibers. Among these fluids is glycogen, which serves as fuel to generate ATP for muscle contractions. This fluid, or sarcopla