1. Effect of Vigorous and Moderate Exercise on Heart Rate Tyler Hubbs

2. ABSTRACT This experiment was done on the effects of vigorous or moderate exercise on the human heart rate. The experimenter used five subjects to do the experiment. First all the subjects resting heart rates were taken and they all were 90 beats/minute, then all of the subjects had to do a moderate exercise routine which consisted of stretching, a 100 yard run, and ten push ups. The subjects heart rates were taken and they were 100, 110, 105, 102, 120. The subjects were then given time and water to rest and have their heart rates return to the original resting heart rate. Once all the subjects’ heart rates had returned to the resting heart rate, the subjects had to do a vigorous exercise routine, which consisted of stretching, a 100 yard sprint, and ten push ups. The subjects’ heart rates were taken and they were 138, 142, 140, 136, and 152. The results found in the experiment supported that the human heart rate is higher when subjected to vigorous activity, rather than moderate activity.

3. REVIEW OF LITERATURE Epinephrine: a hormone secreted by the adrenal medulla upon stimulation by the central nervous system in response to stress, as anger or fear, and acting to increase heart rate, blood pressure, cardiac output, and carbohydrate metabolism. Maximum value: point at which the heart rate levels off and cannot get any higher, exhaustion point Skeletal/Muscle Demand: how much blood the heart has to pump in order to deal with the strain on the bones and muscles

4. QUESTION, PROBLEM, HYPOTHESIS Question: Which exercise type affects heart rate more, moderate exercise or vigorous exercise. Problem: When humans exercise our heart rate increases accordingly to the strain on our muscles from exercising. There are many other factors that contribute to heart rate increase and decrease like weather, body position, and your own level of fitness. This information helped the experimenter study his question, which increases the heart rate more moderate exercise, or vigorous exercise. Hypothesis: If the subjects complete the vigorous exercise routine then their heart rate will be more affected than the moderate exercise routine.

5. EXPERIMENTAL DESIGN MATERIALSMATERIALS Paper Pen 5 subjects Track VARIABLESVARIABLES Constant: Constant: people, workout routines Independent: type of workouts Dependent: heart rate

6. PROCEDURE SET-UPSET-UP Take the resting heart rate of the five test subjects Have the first subject stretch Have the first subject run 100 yards Have the first subject do ten push ups Take the first subjects’ heart rate Record the results Repeat steps 1-6 for the other four subjects Let the subjects heart rate return to their original resting heart rate Have the first subject stretch Have the first subject sprint 100 yards Have the first subject do ten push ups Take the first subjects’ heart rate Record the results Repeat steps 9-13 for the other four subjects

7. RESULTS AND DISCUSSION SubjectsHeart rate after Moderate exercise (bpm) Heart rate after Vigorous exercise (bpm) 1.Dakota Jacobson100138 2.Tyler Hubbs102136 3.Tanner Pinnell105140 4.Vincent Hubbs120152 5.Lisa Hubbs110142 From the information gathered from the experiment it supported the experimenter’s hypothesis by showing that vigorous exercise does affect the heart rate more than moderate exercise does. The only problem with measuring heart rate is that you can’t ever repeat exactly what you did for the previous test because uncontrolled factors that could affect the results are body position, state of health, and weather conditions, and oxygen intake (A.C.E., 2004, 1). In future studies these may be able to be controlled as long as only one person does the tests in the same lab, but your still left with state of health, because the subject is getting used to doing all the running and walking and strengthening the muscles used to do so.

8. DATA ANALYSIS HEARTRATEHEARTRATE SUBJECTS After the experiment was completed the results showed that the subjects’ heart rate was affected more by the vigorous exercise routine than the moderate. The heart rates of the subjects after the moderate were 100, 110, 105, 102, and 120. The heart rates of the subjects after resting and then completing the vigorous exercise were 138, 142, 140, 136, and 152.

9. CONCLUSIONS AND FUTURE STUDIES The experimenters hypothesis was supported and the results showed that vigorous exercise does increase heart rate more.These studies with heart rate could be used in order to help people with exercise plans, which could lead to a decrease in obesity in America. Using this information it could help gyms, fitness centers, and just regular people to come up with an exercise program that is tailored to them.

10. ACKNOWLEDGEMENTS AND BIBLIOGRAPHY I’d like to thank my parents for helping out in the experiment and I’d also like to thank Dakota Jacobson and Tanner Pinnell for doing the experiment also. Brunner, E. Hemingway, H. Kumari, M. Malik, M. Marmot, M. Rennie, K. (2003). Effects of Moderate and Vigorous Physical Activity on Heart Rate Variability in a British Study of Civil Servants. Retrieved January 5, 2010, from Oxford Journals website: http://aje.oxfordjournals.org/cgi/content/abstract/158/2/135\ http://aje.oxfordjournals.org/cgi/content/abstract/158/2/135\ Roberts, S. O. (2002, July-August). Heart rate response to exercise. Retrieved December 14, 2009, from bnet website: http://findarticles.com/p/articles/mi_m0675/is_4_20/ai_90924147/July-Augusthttp://findarticles.com/p/articles/mi_m0675/is_4_20/ai_90924147/ Montana State University. (1998, April). Heart Rate During Exercise. Retrieved December 14, 2009, from Montana State University website: http://btc.montana.edu/Olympics/physiology/cf02.html http://btc.montana.edu/Olympics/physiology/cf02.html Bryant, C. (2004, March/April). Q: Why is an elevated heart rate alone not always a valid indicator of an effective aerobic-training stimulus. Retrieved January 12, 2010, from A.C.E. website: http://www.acefitness.org/fitnessqanda/fitnessqanda_display.aspx?itemid=345 http://www.acefitness.org/fitnessqanda/fitnessqanda_display.aspx?itemid=345