HR Synthesis Essay

Atropine showed the only a minor increase in amplitude and period. The BPM was the detected as increase up to 30 seconds then a drop back down to 44, then the heart rate shot back up to 48 before recovering.

However, it increased constantly as the reps were increased after resting. The exerciser was given a break for about 2 to 3 minutes in order for his heart rate to get back to normal. This allowed the data to be more accurate because every time the exerciser did a new set of reps, he had started from rest. An experimental error was that the person could have miscounted the bpm, resulting in inaccurate results. The person who was timing the bpm count could have been off increasing or decreasing the bpm.

Also seen in the graph, we can see that Jonathan’s results have a rogue showing that his pulse rate dipped a lot but then proceeded to decline steadily and mine also has a rogue where my pulse rate dips a lot straight after exercise too.

An untrained 22-year-old male human subject was chosen. A PT-104 pulse plethysmograph was wrapped around his dominant (right) index finger. Connected through a IXTA data acquisition unit, heart rate was monitored on LabScribe. The recordings were measured with ten seconds of leeway at the beginning and end to allow baseline pulse recovery. Digital marks labeled the time interval of the described action. First the subject’s heart rate was measured during a resting phase for twenty seconds. He was encouraged to relax and remain inactive in order to confirm an accurate baseline reading. For the apneic condition, the subject repeated this

Exercise increases heart rate by a process of sympathetic autonomic stimulation. Sympathetic (adrenergic) nerves increase the excitability of the sino-atrial node and reduce the P-R interval .As exercise continues, the physiological changes in the body are continuously monitored by a number of physiological systems and the balance of activity of the sympathetic system (speeding up) and the parasympathetic system (slowing down) is constantly adjusted. When exercise is over, the heart rate does not drop immediately as the body has to undergo a period of re adaption to return to the resting state.

trained athletes will have a lower heart rate during this period of exercise. Recovery heart rates –

Heart rate begins to increase during exercise because in order to produce energy for contraction, the working leg muscles require more oxygen. When the subject increased exercise, the heart was beating faster to get oxygen to these cells and to circulate the blood back to the lungs to get rid of carbon dioxide. During exercise, the body needs more than the normal cardiac output, due to increased demand for oxygen. Thus the heart is beating harder to get blood to the body and this leads to an increase in MAP in the vessels as well. The heart ejects a greater volume of blood with each stroke and in turn, this creates a higher mean arterial pressure. Ultimately, an increase in heart rate leads to an increase in cardiac output which both work together to meet the body’s oxygen demands (cardiac output= stroke volume x heart rate). As shown in both figures 4a and 4b, a plateau was reached because the body was performing at its maximum at that point. This may not be reflective of maximum heart rate as the body may have been able to reach a higher HR and MAP, but this was the hardest the body was working during this exercise. During recovery, both HR and MAP begin to fall, because oxygen demand to the muscles decrease as the working muscles begin to slow down. In Figure 4b, there is a slight

Exercise is a strong influencer of both heart rate and blood pressure. Isometric exercise, or exercise that involves muscle contraction but not movement, moderately increases the demand for oxygen in the skeletal muscles. Dynamic exercise, or aerobic exercise involving movement, greatly increases the demand for oxygen in skeletal muscle. Both of these exercise types lead to increase in both systolic blood pressure and heart rate to increase blood flow to the active tissues

Name(s) : Josh Feagin, Eduardo Campos, and Joel McLaughlin What is the Effect of Exercise on Heart Rate? Objectives Develop a hypothesis about the effects of exercise on heart rate Compare heart rates of individuals at different activity levels Determine the heart's recovery time Safety considerations: If you have any medical conditions that may prohibit you from physical activity, abstain from the activity and gather data from your group. Experimental Questions: How does exercise affect heart rate?

As a matter of first importance, there are numerous reactions that happen in the cardiovascular system that produce improvements inside of the initial two minutes of exercise. One of these is heart rate. The heart rate rises by pumping more blood around the body. Typically, the cardiac muscles of the heart dividers will contract around 60-80 times each moment. Nonetheless, when exercise is begun, the body understands that more oxygen is required for the muscles to work at their maximum capacity. In this manner, the heart pumps more blood

In conclusion, most of the hypotheses were supported by the data collected during this lab experiment. The heart rate was hypothesized to increase during exercise and return close to normal values during the recovery phase. Figure 1 shows that both subject 1 and 2 support the initial hypothesis. The heart rate should increase during exercise because the muscles will need a greater supply of oxygenated blood for respiration, so cardiac output must also increase. The medulla stimulates the heart to increase the rate of contraction while the heart is able to increase stroke volume.

Summary statement: Heart rate increases during and after exercise and begins to drop back down close to the basal rate after rest.

The authors then share their analysis on the changes of heart rate and GSR at the many different points throughout their study.

Each test subject started off seated in a chair at room temperature, in the same classroom, with a resting heart rate and normal breathing patterns. We took the subject’s resting blood pressure (both systolic and diastolic pressures) and heart rate with a sphygmomanometer (blood pressure cuff) made by MABIS Healthcare Inc, measuring the pressure of the brachial artery on the upper left forearm. The red indicating mark on the blood pressure cuff was aligned with the inside of the antecubital space. Once the first resting heart rate and blood pressure was recorded, the subject was asked to hold their breath for 30 seconds. After 30 seconds the

The heart rate is a measurement of how many times the heart beats in a minute. Physically fit people tend to have a lower heart rate and during intense exercise tend to have lower rates as well. A decrease of heart rate at both rest and at fixed intensity of sub-maximal exercise [7] occurs a few months after an exercise program is begun. One’s heart rate reflects the amount of work the heart must do to meet an increase of demands of the body when engaged in activity. Heart Rate tends to increase proportionally with intensity oxygen uptake [16].