If your heart muscle is stronger, it can pump a greater volume of blood with each beat, reducing the requisite number of beats per minute to satisfy the cells’ need for oxygen. The fitter you are, the more efficient your heart gets at having these stronger contractions, which increases you...
If your blood volume is 5 L, and each beat of your heart pushes out 70 mL of blood and your heart rate of 70 beats per minute, how long does it take for all of your blood to move through your heart? In sinus tachycardia, the heart rate is between and ___ and ___ beats p...
To help determine what an ideal or target running heart rate is for you, you'll first need to know your maximum heart rate, which is based on your age. You'll then plug that number into a formula to calculate your target heart rate while running, which should be somewhere between 50 a...
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heartbeat. 答案:irregular 12. In all ___(serious),if Mike does resign,a lot of others will start leaving too. 答案:seriousness 13. The father has adopted a fairly___(tolerate)attitude toward his son’s behavior. 答案:tolerant 14. Soon after that,labor markets became very tight and mone...