Step Test

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In order to determine ones level of cardiovascular fitness, the pulse rate and rate of respiration can be measured before and after aerobic exercise. Two subjects are asked to perform a series of Step Tests involving one stepping up and down on a low platform for three minutes. One subject holding a knapsack filled with 3 moderately heavy textbooks while the other one is not. The pulse rate and rate of respiration was taken before and after the test in order to determine if in fact carrying textbooks had an effect on the immediate heart rate or if carrying text books had no effect on the immediate heart rate. Materials

-Low platform
-Knapsack filled with 3 moderately heavy textbooks
-Stopwatch
-2 volunteers

Method
1.Place the two volunteers in a sitting or resting position. 2. For each subject measure the resting pulse rate by counting the number of beats in the radial artery (located in the wrist above the thumb) using 3 fingers for 1 minute. 3.Place the knapsack on the back of one volunteer.

4.Have the 2 volunteers step up and down on the low platform at a rate of 24 – 30 steps per minute, for a total of 3 minutes. 5.Measure the pulse rate for both subjects immediately after 3 minutes 6.Measure the recovery time by continue the pulse rate at 1 minute intervals until the subjects pulse rate has returned to normal.

Variable and Controls
Dependant Variable: Heart Rate
Independent Variable: Number of textbooks
Controls: Use 3 moderately heavy textbooks

Results
Table 1: Pulse Rate and Recovery Time Under Treatment 1 (Without Knapsack) Treatment 1
Subject12345Average
Pulse Rate Before the Step Test
76
64
80
96
88
81
Pulse Rate After the Step Test
132
90
90
168
138
124
Recovery Time (min)35.52.2521.52.85

Table 2: Pulse Rate and Recovery Time Under Treatment 2 (With Knapsack) Treatment 2
Subject12345Average
Pulse Rate Before the Step Test
80
72
72
68
66
72...
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