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?

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)

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

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.

Average resting heart rates Beats Per Minute (BPM) Newborns (0-3 months) 100-150 Infants (3-6 months) 90-120 Infants (6-12 months) 100-160 Children ages 1-10 70-130 Children over age 10 and adults 60-100 Well-conditioned athletes 40-60

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).

Average Respiratory Rates