The hypothesis is that exercise will raise blood pressure for both age groups, and that adults will have a higher resting blood pressure reading than the children.

You will measure the blood pressure of two age groups before and after exercise, and record the results.

You will need 5 girls and 5 boys ages 12-13, 5 women and 5 men ages 29-35, and 5 women and 5 men ages 49-55. You will also need a chart to record the data, a pencil or pen, a blood pressure monitor, a desk, and a chair.

The results of this experiment indicate that both of the hypotheses should be accepted. The adults had a higher resting blood pressure reading than the children, and both age groups' blood pressure had raised after exercise.

This science project is interesting because it shows how exercise can affect blood pressure, and how age can be a factor in the change of blood pressure.

Variations to consider include gathering more adults and trying to get an equal number of people in each group, conducting more than one trial, and gathering three or four groups instead of just two.