1. Lab investigation…
Question: How will your body respond to the stimulus of increased physical activity?
What “tests” should we perform?
What data do we need to collect?

2. Designing an Experiment
Only one factor should be changed (variable)
All other factors should remain constant
Detailed list of procedures
Hypothesis: Educated guess; what do you think will happen. Written in an “If… then…” statement.
Record all data (qualitative and quantitative)

3. Data collection What data is useful to this investigation?
Heart rate, respiratory rate, other changes to body – flushing, sweating, etc.

4. Measuring Heart Rate
Your pulse is the rate at which your heart beats. Your pulse is usually called your heart rate, which is the number of times your heart beats each minute.
Units for heart rate = beats per minute (bpm).
As your heart pumps blood through your body, you can feel a pulsing in some of the blood vessels close to the skin's surface, such as in your wrist or neck.

5. Average resting heart rates
Beats Per Minute (BPM)
Newborns (0-3 months)
Infants (3-6 months)
90-120
Infants (6-12 months)
Children ages 1-10
70-130
Children over age 10 and adults
60-100
Well-conditioned athletes
40-60

6. Measuring Respiratory Rate
Respiratory rate (also known as, respiration rate, breathing rate, breathing frequency, and respiratory frequency) is the number of breaths a person takes during one minute. It is usually measured at rest, while sitting.
Units are breaths per minute (breaths/min).

7. Average Respiratory Rates