Exercise/pulse rate

Lab#: 15
Title: Exercise/pulse rate
Aim: To investigate the effect of exercise on the pulse rate
Materials/ Apparatus:
Stop watch
Diagram:

Procedure:

1. The three middle fingers were placed just behind the bottom of the wrist as indicated in the diagram in order to see if the pulse could be felt.
2. (a) If the pulse was not felt the three fingers were moved about until it could be felt. (b) Changing the hand also helped to find the pulse.
3. The number of pulsation for one minute was recorded and this was repeated for at least four times.
4. The average pulse rate per minute was found.
5. For two minutes a specified form of exercise by the teacher was done.

Results:

1. Table showing normal pulse rate and the average pulse rate

Time (Minute)
Pulse
1
76
2
73
3
81
Average
76.66

2. Table showing pulse rate after the first series of exercise
Time (minute)
Pulse
1
136
2
117
3
112
4
96
5
90
6
81
7
81

3. Table showing pulse rate after second series of exercise
Time
Pulse
1
154
2
134 3
120
4
110
5
100
6
98
7
96

4. Table showing pulse rate after third series of exercise
Time (minute)
Pulse
1
127
2
96
3
83
4
82
5
80

Observations:
The subject’s pulse rate increased as the exercise intensity was increased.
As the subject was panting for breath, the pulse was increasing.

Discussion:
The heart is a large muscular organ that pumps blood throughout the body. Valves inside the heart open and close with blood flow. This controls how much blood will enter or leave the heart. Oxygen rich blood enters the heart from the lungs and goes out to the rest of the body while poor oxygenated blood enters the heart from the body and goes to the lungs.

A heartbeat has two parts. They are sometimes called lubb and dubb. A lubb happens when the upper chambers of the heart contract to squeeze the blood downward into the