Muscle Relaxed

Z line

Testing Muscle Stamina and Strength

Materials bathroom scale, notepad, pencil

Procedure

1. Create a chart that coompares the strength of pectoral muscles at four different time intervals, each 1 minute apart.

2. Press the scale between the palms of your hands. Have your partner record the amount of pressure applied by your pectoral muscles.

3. Set the scale down and press your hands together in front of you for 1 minute. Press the scale between your hands again and have your partner record the pressure.

4. Repeat steps 2 and 3 two more times. Then repeat the experiment with your partner pressing the scale while you record the pressure.

Analysis What trends did you notice, if any, in the amount of pressure recorded? What might be a reason for this trend?

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