Procedure:

First, we had each member in our group sprint 100 meters. Before we ran, we got our resting heart rates. We did this by finding are pulse on either or neck or wrist and counting how many heart beats we heard for six seconds. Then, we multiplied that number by ten and that was our resting heart rate. We used this number as a base line for our heart rates. We then sprinted the 100 meters and recorded our heart rates immediately after. After recording our heart rates right after, we had a timer going for 30 seconds and recorded are heart rates in 30 second intervals. We stopped recording heart rates until everyone's heart rate was back at resting.

We then did another sprint of 200 meters. Once again everyone sprinted again and recorded their heart rate immediately after, and in 30 second intervals until our heart rate's went back to normal. We recorded all the data from the 100 meter sprint and 200 meter sprint and put it into a table, then converted that table into graphs. It took a little longer for our heart rates to go back to normal so our data (graph/table) is a little bigger for the 200 meter sprint. We used this data in our Lab Write Up and Poster, but the graphs can be seen below.

Analysis:

When looking at the data it is clear to see that when our body exercises our heart rate goes up, and when we exercise for a longer period of time it takes longer for our heart rate to go back to normal. Our heart rate changing is due to the body maintaining homeostasis. When we exercise the heart beats faster so oxygen can travel throughout the body quicker. Our muscles need extra oxygen. The longer distance sprint had a higher heart because you were pushing your body more than the shorter distance sprint. This requires more oxygen needed and a higher heart rate to complete that task. Though, with a higher heart comes a longer recovery time, because it takes a while for a quickly beating heart to slow down. Overall, you can see from this experiment, that when your tired from exercise, your body's heart rate goes up, to maintain homeostasis by allowing your body to breathe, by getting oxygen to the muscles. A much more detailed analysis can be seen in our Lab Write Up and Poster (links below).

Projects: Poster and Lab Report

Content:

• Homeostasis: the tendency toward a relatively stable equilibrium between interdependent elements.

• Heart Rate: The speed of the heartbeat measured by the number of contractions (beats) of the heart per minute (bpm). The heart rate can vary according to the body's physical needs, including the need to absorb oxygen and excrete carbon dioxide. We measure our heart rate by (counting our pulse for 6 seconds)(10)=our heart rate.

• Dependent variable: The dependent variables represent the output or outcome whose variation is being studied. Our dependent variable was our heart rate.

• Independent variable: In mathematical modeling, statistical modeling and experimental sciences, the values of dependent variables depend on the values of independent variables. Our independent variable was the distance ran (100m or 200m).

Reflection:

One thing that I think our group did well on was collaboration. We all came up with the ideas from the project together and were able to keep adding on the make it even better than it was before. Everyone was very open to others ideas and it made for a very, easy-going, smooth project. Another thing I think I individually did well was my thinking clearly/thoughtfully. I really out a lot of time and effort in this project and did a lot of work, to make sure I understood the project and we can explain it to others well.

One thing I think our group could have done better was be a little more creative. A lot of groups did running and we could have done something a little more out of the box. Something such as sprinting up a hill, or cartwheels, something more exciting than sprinting in a strait line. Also, our group could have been a little better at communication. Most of the remembers did great at recording their heart rate but when one member would forget or mess up or not record it it would mess up the data and made the project a little inaccurate. Though overall, our project came out super well and was super fun to do.