Body Muscles Essay

The first time I realized I wanted to specialize in medicine was when my father took me to the fire station when I was around the age of fourteen. He began to show me images of different cases and trauma scenes they had participated in. Since then, I have constantly asked my dad questions about different calls and scenarios about patients he has rescued. By having a father in the medical field and continuing to take science and medical courses throughout high school, I began to learn more about medicine throughout the years. Deciding to partake in these courses further advanced my understanding in medicine. These courses helped it become clear to me that the medical field is something I continuously

Strengthening exercises are very important in preventing injury, especially to the knee. Most of the protection afforded the knee comes from the powerful quadriceps muscles, the hamstrings, and the calf muscles. These muscles control the movement of the knee. If they do not have proper tension, the control of the joint will be lost. When these muscles are weak, the knee is not only unprotected, it has to assume a much greater load and this can be painful.

Muscle contraction can be understood as the consequence of a process of transmission of action potentials from one neuron to another. A chemical called acetylcholine is the neurotransmitter released from the presynaptic neuron. As the postsynaptic cells on the muscle cell membrane receive the acetylcholine, the channels for the cations sodium and potassium are opened. These cations produce a net depolarization of the cell membrane and this electrical signal travels along the muscle fibers. Through the movement of calcium ions, the muscle action potential is taken into actual muscle contraction with the interaction of two types of proteins, actin and myosin.

Having a strong back will get you a greater amount of bodybuilding titles than any other muscle group. Take a glance at the names of former Mr. Olympia champions. Dorian Yates used his unusually massive and thick back to beat out bodybuilders who had much better chest and arms. Ronnie Coleman also found this useful. He had a wider back than anyone else, and he used his back to out shine the other competitors and win the Mr. Olympia title eight times. When Coleman hurt himself and didn’t have the advantage of his huge back, Jay Cutler stepped right in and beat him with a massive back.

A muscle is made of fibers. They are long cylinders that are larger than many specialized cells in the human body, about 1-40 microns long and 10-100 microns in diameter. Muscle fibers are made of myofibrils, or filaments. The filaments are arranged in a hexagonal shape. There are both thick and thin filaments. The z-disk or z-line runs down the long axis of the muscle fiber. The z-disk is a structure made up of myofibrils and is called a sarcomere. Running along the z-disk is the t-tubule which is a membrane system called the sarcoplasmic reticulum. This stores and releases the calcium ions that cause muscle contractions. While a muscle is contracting, the myosin

Rationale, Significance and Hypothesis. An extrinsic factor, which exerts a dominant influence on skeletal muscle fiber phenotype, is the nervous system. Buller et al. (1960) elegantly demonstrated the plastic nature of skeletal muscle fibers in response to changes in innervation type. Later, Lφmo and Westgaard (Lφmo and Westgaard, 1974; Westgaard and Lφmo, 1988) demonstrated that depolarization of muscle with specific patterns and frequencies of electrical activity are sufficient to cause changes in mature muscle fiber phenotypes. However, how myofibrillar gene expression and structural organization is affected by the frequency of impulses during activity, the amount of activity over time, or other characteristics of patterned activity is essentially unknown. To answer these questions will require the isolation and study of subsets of muscle-specific proteins in relation to different electrical activation patterns in vivo, an issue that cannot be easily addressed in preparations currently used in the study of muscle development and maintenance. However, using novel in vivo approaches can, in part, circumvent this difficulty.

Hamstring injuries are some of the most common injuries in sports. This is especially true in soccer, wherein leagues such as Australian Rules football in accounts for 16-27% of injuries (Mjolsnes et al). Due to the fact that this type of injury is so common, it is advised that soccer programs take precautions to help limit the number of their athletes injuring their hamstrings. The best way to do this is to get the athlete to learn how to better eccentrically contract their hamstrings and the exercise that is best suited to help you do that is the Nordic Hamstring Exercise. Eccentric exercises are the aptest at reducing hamstring strains and Nordic Hamstring exercise is the best eccentric exercise to do this, therefore it should be a staple exercise for any soccer team.

If you are trying to build up your body and help boost your athletic performance, you need more than just time in the gym. Amino acids should be added to any serious athlete’s routine if you want to provide your body with what it needs in order to build stronger, more powerful muscles. Your muscles store fatty acids, glucose, as well as amino acids from protein and all three are used as energy and fuel during exercise. However, in order to help preserve muscle mass, your muscles will burn off fatty acids and glucose first before it uses amino acids as fuel. Used as your last line of defense, amino acids are used as a building block for new muscle. When your muscles are consistently contracting it results in micro-trauma, which are microscopic tears in the muscle. These tears require repair

Football is the famous sport played in the world, and players need technical, tactical and physical skills to succeed. Strength is components of physical fitness which very important to increase football performance as important as with others components of physical fitness, such as speed, coordination and flexibility (Ruivo, Carita, & Pezarat-Correia). According to Taha, Lee, Ahamed, Joseph, and Omar (2016) strength training is the type of exercises that make the muscles to stretch hundred percent which can helps to build the strength, anaerobic, and increase in size of skeletal muscles using resistance training . Strength training also can increases sport performance and also to maintaining condition of athletes. Another study by Fábrica, López, and Souto (2015) state that strength or power training could be of great interest to the sport community especially in sport like football, in which performance is include the high intensity intermittent activity like explosive strength or power is one

Bigorexia as know as muscle dysmorphia and both have definitions. Bigorexia is defined as “a mental disorder characterized by a normal person´s obsession with an imagined defect in physical appearance; also called muscle dysmorphia” and muscle dysmorphia is defined as “a mental disorder primarily affecting males, characterized by obsessions about a perceived lack of muscularity, leading to compulsive exercising, use of anabolic steroids, etc.” in dictionary.com.

Muscle torque is beneficial when multi-joint movement (throwing) taken place with accordance to Central Nervous System, Interaction torque, and the muscles involving when torque occurred. Torque in multijoint limb movements doesn’t only occur from muscles acting at a specific joint, but from interactions due to the rotations of other joints (Hollerbach and FLash, 1982). In this case, it supports Bernstein's idea that muscle torque at the two joints was not necessary related to each other to produce coordinated joint movement (Turvey 1990). The muscle torque (MT) is a measurement of action muscle torque to rotate the joint (Marconi 2008). Moreover, the interaction torque (IT) is one of the self-generated load that is generated by the movement

One muscle group that must be worked out is the calf muscle. This muscle is made up of two muscles (the gastrocnemius muscle and the soleus muscle) and can be strengthened in a few different ways. Some exercises that can benefit the calf muscles are: The Double-Leg Calf Raise, which requires your body weight, The Single-Leg Calf Raise, which helps your body get aligned to protect your joints, The Seated Calf Raise, which can work both your gastrocnemius muscle and your soleus muscle, Running, Walking, and Hiking. All of these exercises can be done quite easily and efficiently. There are also various reasons to strengthen this muscle. One of these reasons is that it is not good for your calf muscle to be weak or thin, especially if you are

Everything floats in space without gravity. This means there is no need for astronauts to stand, walk or lift in microgravity, and their muscles, especially in their legs weaken and waste away. This affects balance posture and strength and increases the risk of tendonitis, injuries and accidents. To counteract this, astronauts need to excurse and take nutritional supplements

twitch muscles. Fast twitch muscles have a fast form of myosin ATP and are very

If you believe that arm workouts are only for men than you need to rethink a little. Getting toned and muscled arms is as important as any other exercise for your body. You cannot get that perfect physique without working out your arms. A negative myth about arm workouts is that they can make your arms bulky and will you make you look like the hulk. But the truth is that a women’s body cannot produce as much testosterone as men, as a result, you cannot get that puffed and muscular arms like men. The best thing about arm workouts is that they are very easy and simple unlike other workouts. Bicep workouts are the most common type of arm workouts that people do. Bicep workouts for women are very similar