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Physiology of the body related to exercise
Physiology of exercise
Physiology of exercise
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Exercise: Distance Treadmill Running
When we are challenged with any physical task, the human body responds through a series of integrated changes in function that involve most, if not all, of its physiologic systems. Movement requires activation and control of the musculoskeletal system; the cardiovascular and respiratory systems provide the ability to sustain this movement over extended periods.
Physiological Responses:
From experience I know that while on the treadmill before long my chest is heaving, my lungs are bursting, my heart is pounding, I get hot, sweat profusely, and the previously coordinated movement of my limbs start to falter; my muscles ache and my brain tells me to stop.
Within minutes of starting this strenuous exercise the body temperature can rise by several degrees Celsius, and activation of thermoregulatory heat loss mechanisms (principally sweating and opening up of skin blood vessels) becomes essential in order to keep the body as cool as possible.
Certainly, exercise is a challenge to homeostasis.
Heart rate increases to pump more blood to the muscles all over the body which are working harder. Therefore, your cardiac output increases. The heart rate and the cardiac output are proportional to each other.
www.medicdirectsport.com detailed that “The energy requirements of muscle during exercise are met not only by an alteration in intramuscular metabolism, but also by integrated activity of the cardiovascular, respiratory, endocrine and nervous systems.”
The body produces lactic acid whenever it breaks down carbohydrates for energy. We use energy when we exercise therefore lactic acid is produced when we exercise.
www.cytosport.com detailed that “When the body makes lactic acid, it splits into lactate ion (lactate) and hydrogen ion.
The data collected during this experiment has shown that a relationship likely exists between the rate of muscle fatigue and the time spent performing vigorous exercise prior to the set of repetitive movements. This is likely due to a build-up of lactic acid and lactate as a result of anaerobic respiration occurring to provide energy for the muscle cell’s movement. As the pH of the cell would have been lowered, the enzymes necessary in the reactions would likely not be working in their optimum pH range, slowing the respiration reactions and providing an explanation to why the average number of repetitions decreased as the prior amount of exercise increased.
One of the most primitive actions known is the consumption of lactose, (milk), from the mother after birth. Mammals have an innate predisposition towards this consumption, as it is their main source of energy. Most mammals lose the ability to digest lactose shortly after their birth. The ability to digest lactose is determined by the presence of an enzyme called lactase, which is found in the lining of the small intestine. An enzyme is a small molecule or group of molecules that act as a catalyst (catalyst being defined as a molecule that binds to the original reactant and lowers the amount of energy needed to break apart the original molecule to obtain energy) in breaking apart the lactose molecule. In mammals, the lactase enzyme is present
Kinesiology: The Mechanics & Pathomechanics of Human Movement (Second ed.). Glenside, Pennsylvania: Lippincott Williams & Wilkins. Qiao T, Liu C and Ran F. (2005) The impact of gastrocnemius muscle cell changes in chronic venous insufficiency. Eur J Vasc Endovase Surg 30; 430-436.
The heart is an extraordinary structure that is the base of all human life. However, it similar to the uncomplicated functions of water pumps. As the heart beats, blood is distributed throughout the body using a network of blood vessels. The functions of the heart can be kept in regular and healthy conditions through exercise. Exercise has an effect on the blood that is circulating through the body. That circulating blood makes the heart desire more oxygen, causing the heart rate to increase rapidly to keep up with activity demand.
McKenzie, D. C. (2012). Respiratory physiology: Adaptations to high-level exercise. British Journal of Sports Medicine, 46(6), 381. doi:10.1136/bjsports-2011-090824
That is when muscles switch from aerobic respiration to lactic acid fermentation. Lactic acid fermentation is the process by which muscle cells deal with pyruvate during anaerobic respiration. Lactic acid fermentation is similar to glycolysis minus a specific step called the citric acid cycle. In lactic acid fermentation, the pyruvic acid from glycolysis is reduced to lactic acid by NADH, which is oxidized to NAD+. Lactic acid fermentation allows glycolysis to continue by ensuring that NADH is returned to its oxidized state (NAD+). When glycolysis is complete, two pyruvate molecules are left. Normally, those pyruvates would be changed and would enter the mitochondrion. Once in the mitochondrion, aerobic respiration would break them down further, releasing more
The extra heat produced during metabolic exchange, raises the body temperature again affecting the enzymes and heat is then removed by sweating. If the body isn’t kept hydrated during exercise, dehydration will occur, causing the blood to become concentrated. When the blood becomes concentrated, the cells no longer have enough water to function.
Tremblay, A., Simoneau, J., & Bouchard, C. (1994). Impact of exercise intensity on body fatness and skeletal muscle metabolism. Metabolism, 43(7), 814--818.
Lehmann, Manfred, Carl Foster, and Joseph Keul. "Overtraining in endurance athletes: a brief review." Medicine & Science in Sports & Exercise (1993).
The last time I did not run for consecutive days, was during Middle School. Running has been a very powerful tool for me, and the joy it brings is something I carry. As a person who has an unhealthy amount of anxiety in my life, running has been an outlet for me. Whenever I feel anxious or stressed out, I run. There are two ways running brings me relief; the first is it is an immediate distraction from whatever is bothering me. In addition, running also gives me a “runner's high” after I run. While this may seem unimaginable, it is actually very real because the pleasure of finishing a workout has few parallels. After I run, for the rest of the day, my mood is elevated.
•While exercising your lungs tries to increase the intake of oxygen as well as release the carbon dioxide.
These results make sense because the heart beats faster in order to keep the body’s cells well equipped with oxygen. For one to continue exercising for long amounts of time, cells need to create ATP in order to use energy. Oxygen must be present for the process of creating ATP, which not only explains why higher respiratory rates occur during exercise but also faster heart rates. When the heart is beating rapidly, it is distributes oxygenated blood as fast as the body n...
Hypothesis – I predict that as the intensity increases during exercise the heart rate will also increase. I think this because your body needs oxygen in order to efficiently break down glucose and process it into your cells. As the exercise intensifies, you need more energy and therefore more oxygen. Your blood carries oxygen from the lungs to your muscles. To keep up with these increased oxygen needs, you have to have more blood going to your muscles. As a result, your heart pumps faster, sending more oxygenated blood to your muscles per second.
AIM: - the aim of this experiment is to find out what the effects of exercise are on the heart rate. And to record these results in various formats. VARIABLES: - * Type of exercise * Duration of exercise * Intensity of exercise * Stage of respiration
Investigating the Effect of Exercise on the Heart Rate Introduction For it's size the heart has the huge capacity of pumping large amounts of blood, in the average adult's heart beats 60 to 100 times a minute, pumps between 70ml and 100ml of blood with each beat, circulates 5 to 6 litres of blood around the body per minute and about 13 litres of blood per minute during vigorous exercise. The heart will beat more then 2.5 billion times during an average lifetime. This investigation will be looking at the effect of exercise on the heart rate. Aim The aim of this investigation is to find out how exercise affects the heart rate, using research & experimenting on changes and increases in the heart rate using exercise. Research â— The heart The normal heart is a strong, hardworking pump made of muscle tissue.