stroke volume increases dying exercise to increase circulating blood in the body system in order for the body to respond to exercise appropriately. 5. Discuss the importance of the change in CO with exercise? cardiac output increases due to the increase in heart rate and stroke volume during exercise 6. Restate your predictions that were correct and give data from your experiment that support them.
Predictions 1. When the arm goes from resting to flexing, the amplitude and frequency of sEMG spikes will increase. 2. During flexion, the amplitude and frequency of sEMG spikes will ___ during extension be greater than 3. Recruitment of motor units will be greatest when the load is 5 pounds.
What was the maximum force generated at optimal length? 7. How does increasing muscle fiber length affect force of muscle contraction? See Table 6: Stimulation Frequency and Contraction Force See Graph: Effect of Stimulation Frequency on Contraction Force 8. What was the force of contraction at a stimulation
Unit 2 Acute response to exercise is short term effects that exercise has on the body. Musculoskeletal response An acute response of the musculoskeletal system during exercise includes an increase in blood supply. The short term effects on your muscles increases the temperature therefore there is more activation energy so chemical reactions are used by the musculoskeletal system and the metabolic activity increases. As the oxygen demand increases, more oxygenated blood needs to be supplied to the muscles so vasodilatation occurs so more blood can pass through the arteries. This affected me during the bleep test because vasodilation allows more oxygenated blood to travel to the actively respiring muscle tissues.
Compare the resting and exercising systemic vascular resistance values and discuss what causes the observed change with exercise. The systemic vascular resistances (SVR) from resting (average 17 mmHg) to after exercising (6.5 mmHg) decreased. SVR is affected by cardiac output, blood vessel diameter, and length of vessels. Cardiac output increases if the heart rate or stroke volume is increased. Blood vessels, if constricted, increase SVR and blood pressure while vasodilation decreases SVR and blood pressure.
This single metabolic fact accounts for the profound changes in not only respiration, but also in cardiac and circulatory physiology during exercise. Increased oxygen supply is provided by increases in both arterial oxygen delivery and tissue oxygen extraction; at the same time there is increased carbon dioxide transport on the venous side. The need for increased gas exchange by exercising muscles leads to the following general physiologic
Each time a cross-bridge from the myosin filament releases from an actin filament energy is used. Therefore, the more muscle tissue you have,and the more you use it, the greater your energy expenditure'which is also caloric expenditure. 5.) Define and describe concentric and eccentric muscle actions. Define motor unit.
|[pic] |[pic] | |When you begin exercise, your muscles undergo change, these are ‘acute responses in the working muscles’. | |These changes are – increased blood flow (to the muscles) | |increased muscle fibre and motor unit recruitment | |increased number and power of muscle contractions | |increased muscle temperature | |Decreased fuel stores (ATP, PC, Glycogen and Triglycerides. | |Increased diffusion of oxygen into the muscle cells. | EXTRA READING………….. |Macmillan |All of the functions performed by the muscular system are performed by 3 types of muscles; smooth,
Your legs. Your respiratory system, your lungs Part IV: Principle of Overload By increasing your pace ((intensity)) , you made your heart beat faster and work harder. This is called overload. Increasing the number of days you jog from two days to three days is another way of overloading your body. A third way to overload is to increase the distance covered.
Unit 2: The Physiology of Fitness Assignment: No 1 Task 1.a Task1b Musculoskeletal response Increased blood supply The short term effects of exercise on your muscles include an increase in temperature and metabolic activity. Result: - greater demand for oxygen in blood supply through capillary dilation. Increase in muscle pliability When you warm up your muscles during activity makes them more pliable and reduces the risk of injury. Increased range of movement The short-term effect of exercise are demonstrated by changes within the joint. Movement of joints stimulates the secretion of synovial fluid.