1,Cardio.1

1,Cardio.1 - Cardiovascular Heart Rate: (HR) the number of...

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Cardiovascular Heart Rate: (HR) the number of times the heart contracts per minute “# of contractions/min” Stroke Volume: how much blood is ejected by each ventricle when the heart contracts. (SV) volume of blood ejected by each ventricle/contraction Cardiac Output: the product of the HR and SV: it is the volume of blood ejected by each ventricle per minute: (Q) = volume of blood ejected by each vent/min Cardiac Output Formula : Q=HR(b/min) X SV(mL/b) Rest (Sedentary) 5L/min = 70(b/min) X 72(mL/b) Rest (Athletic) 5L/min = 50(b/min)X100(mL/b): athletes have slower resting heart rate: Training reduction of training heart rate: BRADY CARDIA. Bradycardia: Slow heart rate Tachycardia : Rapid heart rate Max Exercise: Sed:~17L/min (3 circuits per minute), ex:20 year old: 220-20=200bpm, for stroke volume is 200 X 85mL/b. Ath Endurance is ~above 30L/m (every 10 sec and circuit) if they are 200x100mL/B: Cardiovascular system is a limiting factors due to blood flow capabilities. When they do cardio it benefits people to increase blood flow, by doing aerobic exercise. NOT anaerobic exercise. Fick Equation: measure cardiac output (not predicting) Q=VO2/a-VO2/v, which means the diff =(arterial and venous difference): Venous blood is not the same everywhere, and it had to be measured in the right side atria (vinacava) Graph: Y: HR and X: Work. Trained endurance: would be the lowest line :work is less. Above is sedentary. Lower: endurance training. Graph: Y: SV and X: Work. Endurance would have higher stroke volume at all levels of exercise. Graph: Y:Q and X: the more Work the more blood flow needed, caveat, Sedentary attenuated and athlete will continue to increase. At some maximal level if they are doing same work and same size, the Cardiac output should be similar, until the endurance trained has higher cardiac output. HR : (easy to obtain during exercise and reflects the intensity of the exercise): Predicted max HR: (220-age+ 10). That’s the standard deviation. In 20 yr old is 190 to 210. Is it dangerous to exercise at max heart rate? As long as there is no atherosclerosis the heart can work at those levels and getting it that high. As people get older, the likely hood is much greater. Determining Intensity Levels: Max HR X %. Ex: Keep HR at 60% - 80%. Its best to exercise at the highest intensity.
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Three variables In Training: Duration (time), Frequency (how many you do it), Intensity(force): the most important is intensity: the greatest effect in vascular system to improve it. If a person of 20yrs of age: Given 70% intensity. Then 200x.70=140b/min. That’s the exercise they should be doing. Ex: Case 1: 20 years old, int. 70%, RHR, 50b/m. Case 2: 20 years old, int. 70%, 80b/m. Using this equation: both would be exercising at 140. Are these exercises equitable? No, the simple calculation reflects the fitness: unless the person is in drugs or just better: using the simple equation doesn’t give a good picture of true intensity. There is a better equation to take this in
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This note was uploaded on 10/28/2010 for the course EXSC 205Lxg taught by Professor Girandola during the Spring '07 term at USC.

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1,Cardio.1 - Cardiovascular Heart Rate: (HR) the number of...

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