Rate. We recorded the bpm before deep inhalation, during apnea, and when breathing rate returned back to normal. The purpose of experiment 2 was to measure how apnea, after a very deep breathe affects the subject’s heart rate.HypothesisOur hypothesis for Experiment 1 is that the heart rate will be normal, and it will range between 55-75 bpm while breathing at rest since the individuals will be normal and healthy and their age ranges between 18-25. Along with that the tidal volume will be around 500 mL (0.500L) since the individuals breathing was taken at rest. Also, heart rate will increase during inhalation and decrease slightly upon exhalation. Knowing this, the heart rate will be higher than the average for normal inhalation and will be slightly lower than the average for normal exhalation. Since these individuals are healthy, their Respiratory Heart Arrhythmia (RSA) value will be normal and range from anywhere between 6 to 12 bpm.Our hypothesis for Experiment 2 is that during apnea after inhalation the heart rate will first slow down so breathing will also slow down, then after a while it will increase because of the decreased oxygen that is received from the body, so to compensate for that the heart rate will increase to come back into normal range. So basically, heart rate will decrease during apnea. Also, during apnea the RSA value will be higher than the normal RSA value range. During deep inhalation the heart rate is higher than average because the individual is breathing harder and forces the lungs to take in more air. This compares to normal inhalation because during normal inhalation the heart rate will increase slightly when an individual inhale and will decrease when the individual exhales. During the recovery of apnea, the heart rate will increase to go back to normal.