Lung Capacity: Method

The Dependent Variable:
Lung Capacity into a balloon before and after a work-out, 3 second blow
The Controlled Variable(s): 
Balloon, 3 second blow
The Independent Variable:
Nothing
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1. Grab the equipment needed, 2 Balloons and Tape Ruler
2. Blow a balloon for 3 seconds
3. Measure the diameter in centimetres and record it using the Tape Ruler
4. Graph the result
5. Complete a 30 minute work-out at full potential
6. Blow the second balloon for 3 seconds
7. Measure the diameter in centimetres and record it using the Tape Ruler
8. Graph the result
7. Repeat for reliability

Experiment (Lung Capacity): Equipment and Order

DAY 1:

Firstly I am going to get two balloons, making sure they are the same size, and lay them somewhere I know they are safe. I am going to grab one balloon before I work out and blow it (3 second blow), then I am going to place it in the safe spot.

Next step is do to my work-out (using my lung capacity) and do it to my full potential for 30 minutes, continuously. Once I have completed that, I am going to grab the second balloon and blow it up.

The last step is to measure the diameter of the first and second balloon and create a graph.

DAY 2:

Repeat the above steps, but also add to the graph, comparing results with size (cm) for reliability.

EQUIPMENT:
- 4 Balloons
- Tape Ruler

(PICTURES WILL BE UP ON MY BLOG SOON!)

Lung Capacity brainstorm

Final Idea Chosen: Diameter

Well, after all my ideas and what I've chose, I had finally decided to pick measuring the diameter of a balloon before a work out, and after a work out. This is to do with lung capacity and how much it decreases or if it's the same, I'll find out soon.