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Ideal Position to Recover Resting Heart Rate- Lab. Does the physical positioning of the human body, whether standing, sitting, or lying down, effect the time it takes the heart rate to recover to the resting heart rate (RHR) after moderate exercise?

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Recovery to Resting Heart Rate Date of Experiment: Mar. 16, 2009- Mar. 17, 2009 Research Question: Does the physical positioning of the human body, whether standing, sitting, or lying down, effect the time it takes the heart rate to recover to the resting heart rate (RHR) after moderate exercise? Hypothesis: The physical position of the body after exercise does affect the time it takes to recover the heart rate back to the RHR, the position that would allow the recovery back to the RHR the quickest after moderate exercise would be when the subject is sitting down because when standing up, the body is using energy and the heart to keep the body up against the force of gravity, and when lying down, the heart will need to pump blood even faster because the body's position might cause the blood to pool, and again, the heart will have to pump against the force of gravity directly. I believe that when sitting down, the heart uses the least amount of energy, and thus meaning that the recovery to the RHR would take the least time no matter what the gender or age is. Variables: Independent: o The physical positioning of the human body Dependent: o Amount of time it takes the resting heart rate Control: o Height of Chair Where the pulse is taken from o Amount of up-down done Amount of time doing exercise Materials: o Stop Watch Human Subjects o Chair at 55cm Procedure: 1. Determine and record the person's age and gender. 2. Measure and record the person's resting heart rate while standing by and counting their pulse for 15 seconds and multiplying times 4. ...read more.


68 68 Sitting 56 120 100 88 80 68 M Laying 56 112 100 92 84 76 7 Standing 60 100 84 72 68 60 67 Sitting 60 92 80 68 64 56 M Laying 64 100 88 80 72 68 8 Standing 64 112 88 76 72 72 69 Sitting 52 124 104 92 84 72 M Laying 60 120 108 92 84 76 9 Standing 64 112 92 80 72 68 71 Sitting 56 120 96 80 72 68 M Laying 68 120 104 92 88 84 10 Standing 68 132 104 96 88 80 67 Sitting 56 140 112 96 88 84 M Laying 64 136 120 108 100 88 Table 7: Average HR at Each Time and Each Position for All Subjects Ages 67-74 Time After Exercise Routine t / (min) Position Resting 0 1 2 3 4 Average Heart Beats / 60 seconds All 60.27 118.13 97.07 85.20 77.87 72.13 Standing 62.80 116.40 90.80 79.60 74.00 69.60 Sitting 54.00 119.20 97.20 82.40 73.20 66.00 Laying 64.00 118.80 103.20 93.60 86.40 80.80 Table 8: % Recovery of RHR for All Subjects Ages 67-74 Position Recovery Rate (%) after "x" Minutes 0 min. (% increase) 1 min 2 min. 3 min. 4 min. All 83.81 54.94 72.48 83.13 96.12 Standing 77.08 53.72 70.27 85.47 102.03 Sitting 87.11 52.41 72.67 85.21 98.07 Lying Down 88.02 58.84 74.49 78.57 88.1 Graph 3: Recovery Rate and Percent Increase for Subjects Ages 67-74 Data Processing: In order to find the Percentage Recovery to RHR, there has to be a series of steps to go through. I will demonstrate one example for each step for deeper understanding using the data from Patrick and Damian. ...read more.


Imagine this, if we accidentally miss one beat at the beginning, and one beat at the end, that is actually 8 beats less than our real Heart Rate. In order for more accurate results, the time frame in which we measured our pulse would have to be longer. Another thing is the speed at which we did our exercise. If the speed of our up-downs was not kept constant, again the results could have been tampered with. If the speed was going very quickly, and let's say that 15 of the up-downs had been completed in the first minute, only five would need to be completed in the second minute. During the second minute, since the workout is going very slow, the heart is given time right there to recover while still completing the desired amount of reps. Unless we ensure that the pace is constant, this could pose a threat to the results. A more important factor that is one we tend to overlook is the one of human error and competition. Maybe somebody may lie about their results just to get a lower heart rate than their friend, or maybe someone was unable to read their pulse that well. We need to remember that sometimes human beings make errors, and sometimes we don't always act ethically. Also, the uneven ratio of boys: girls could have affected the girls' results. Since there are less of them, if one person's results all had very high numbers, it would affect the averages more than if one boy had very high numbers. For the results to be even more accurate there would need to be an even number of both genders. Although there is no such thing as perfect, it is important that we point out mistakes made so that we can learn and improve from them the next time. ?? ?? ?? ?? 1 ...read more.

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