BME100 f2014:Group25 L3

BME 100 Fall 2014	Home People Lab Write-Up 1 | Lab Write-Up 2 | Lab Write-Up 3 Lab Write-Up 4 | Lab Write-Up 5 | Lab Write-Up 6 Course Logistics For Instructors Photos Wiki Editing Help
OUR TEAM Brandon Dorr Beniamin Drotar Diana Tran Angus Cheung Srekar Krishna Nagishetty Ravi Daniel Gentry LAB 3A WRITE-UP Spree Sport Headband An advertisement for Spree, "the world's smartest fitness monitor. Annihilate your personal best with real-time feedback including heart rate, speed, distance, and body temperature. Work out smarter, push further, get results." This experiment was done to test whether or not Spree, a biometric measurement device was effective in its claim to accurately measure heart rate and temperature. ==Descriptive Statistics== Pre-workout: Temperature: Gold Standard: Mean: 97.43860606°F; Standard Deviation: 0.7829228359 Spree Mean: 101.272°F; Standard Deviation: 2.727920158 Standard Error: 0.6983782304 Heart Rate: Gold Standard Mean: 79.24203822 bpm; Standard Deviation: 13.12923986 Spree Mean: 80.60447761 bpm; Standard Deviation: 14.9500515 Standard Error: 6.631565414 Workout: Temperature: Gold Standard Mean: 97.41843434°F; Standard Deviation: 0.882974589 Spree Mean: 102.227564°F; Standard Deviation: 2.891857373 Standard Error: 0.9019839699 Heart Rate: Gold Standard Mean: 99.93401015 bpm; Standard Deviation: 21.08508658 Spree Mean: 101.1196581 bpm; Standard Deviation: 21.55941785 Standard Error: 10.99203745 Post-workout: Temperature: Gold Standard Mean: 97.87127273°F; Standard Deviation: 0.8016820454 Spree Mean: 102.9453125°F; Standard Deviation: 1.977465943 Standard Error: 0.8230598088 Heart Rate: Gold Standard Mean: 83.75 bpm; Standard Deviation: 18.55199128 Spree Mean: 81.41447368 bpm; Standard Deviation: 22.59122612 Standard Error: 10.12538086 Results The lack of overlap in data shows that the Spree device cannot accurately measure the user's temperature. Overlap in data shows accuracy in measurement Analysis In this lab, the t-test was used because the approach that we took explored when and why the Spree was most effective -- if it was. By comparing the Spree and the Pulse ox/Gold Standard thermometer before the working, during the workout, and after the workout, we were able to identify that the Spree was accurate in measuring the user's heart rate, but not his/her temperature. While the Spree app was easy to download, the device was difficult to connect to the phone. Moreover, part of the problem with detecting the temperature of the user was that the device, phone, and sensor always had to be in close proximity to one another. Any spontaneous movements would be able to detect a difference in temperature -- but to what extent? Rather than actually measuring the temperature of the user, the Spree would use a color graded scale as shown below. This scale does not accurately measure temperature nor show its own degree of error. The calculated results of the standard deviation and standard error mimicked the data gathered from the inferential statistical analysis because the temperature sets possessed not only high variance, but also a large standard error when comparing the Spree values to those measured by the Gold Standard. In regards to statistical analyses, during the pre/during/and post workout trials, the T-Test p-value for the heart rate always showed no statistical significance in differences, inferring the measurements were accurate due to the lack of disparities. On the other hand, the measured temperature values displayed p-values so low that the data could not have overlapping or existing data points, concluding that the Spree device could not accurately measure heart rate, since the pulse ox had already been established as an accurate HR measurement device. Moreover, as seen by the results of the Pearson's R test, the heart rate trials consistently showed to have high correlation values -- values close to 1. Unlike those values of the temperature trials, whose Pearson's R values were meager, closer to zero, or in the positives. This measurement of ratios and proportionality further illustrates the accuracy of the Spree in its capability to measure heart rate, and it's lack thereof to measure temperature. Summary/Discussion The Spree headband was effective in measuring the heart rate, but not very effective in measuring the temperature of the participant. The p-value comparing the Spree heart rate values to the gold standard heart rate values, measured with a blood pressure cuff, is much larger than .05, showing that the data points between the two sets of data are similar. The p-value comparing the Spree temperature values to the gold standard temperature values, measured with an oral thermometer, on the other hand was extremely small, showing that the two groups of data were significantly different. Ideally, the device should provide similar values as ones' outputted by the gold standard, in which case the p-value would be high. The temperature mesurement had a low p-value, therefore that aspect of the Spree headband was not statistically significant; the heart rate value determined by the Spree headband was statistically significant as its p-value was near 0.5. The app relatively was easy to navigate, however was difficult to connect to the Spree Device. The app was not compatible with the iPhone 4, so minor patches in the coding could expand the possible users of the Spree headband. The rubber component of the spree headband was not comfortable, and it could possibly be more comfortable if it fit into a more headband type material like elastic and cloth. More vents in the rubber portion of the headband could improve the forehead's ability to breathe, leading to less discomfort in the region. LAB 3B WRITE-UP Target Population and Need Target Population The Spree fitness technology fits the needs of several different audiences. It allows active athletes to more efficiently track measure their bodies statistics while also encouraging people to start working out by giving them easily understandable measurements that they can use to see their progress. The Spree Headband also especially caters to women who tend to have longer hair by acting as a hair band but also accounts for both males and females with their Smartcap, hat design. Spree’s technology is designed to appeal to individuals of ages 16-50. At the age of 16, the consumer is more likely to understand and appreciate the measurements that the band is providing while consumers past the age of 50 tend to have difficulties adapting to technologies like the iPhone (which is necessary for the band to work) and bluetooth. Needs Most of the market for athletic technology apparel is focused around the wrist, so the Spree Band gives a comfortable alternative for those who prefer a head based method of fitness measurement. This means that while the headband or hat is taking your fitness measurements, it is also actively keeping hair and sweat out of your face and making it easier to continue exercising. Furthermore, the Spree Smartcap offers sun protection with a visor on the cap so outdoor sports can be more enjoyable. Lastly, amputees might find Spree technology to be more suitable for their specific needs rather than similar products like the FitBit or Nike® FuelBand. Device Design The Spree app was easily downloaded from the App store on a IPhone 5; however it was not compatible with the IPhone 4. The app had difficulty connecting to the Spree device, but connected easily when the device was finally recognized by the app. The device had a reasonable range to the IPhone, while still being connected. When connecting to the device; it often would recognize other Spree devices, possibly naming your device would be effective. The app was easily read and navigated, but voice activation and hands-free would a rewarding feature. As in current GPS devices, multiple accents and languages should be offered to aid in the hands-free experience. The Spree device gripped the head well during activity. The headbands rubber, as well as elastic band allowed the device to stay firmly fitted to the head. The rubber section of the headband did not breathe very well, and was slightly irritating to the head. Possibly, more vents or holes to allow for breathing would solve the uncomfortable non-breathing nature of the rubber part of the headband. The headband should come in multiple colors, to personalize the experience and provide a unique feel for the individual. The headband could possibly have a mode where it records the temperature and heart rate on the device, therefore if an individual wished to leave their phone, they could look at an overview of their workout and intensity without the need to carry their phone during the workout. Inferential Statistics The T-Test between the Oral Thermometer and the Spree Band for the Pre-Workout, during Workout, and Post-Workout were extremely statistically significant. The Student's T-Test indicates whether or not there is enough evidence to support the null hypothesis; the test results indicate that the two sets of data are significantly different from each other. The T-Test between the the Pulse Ox and the Spree Band for the Pre-Workout, during Workout, and Post-Workout were not statistically significant. The Student's T-Test indicates that there is not enough evidence to support the null hypothesis; the test results indicate that the two sets of data are not significantly different from each other. The T-test indicates that there is a relation between the Pulse Ox and the Spree Band, however it also indicates that there is no relation between the Oral Thermometer and the Spree Band. The Pearson's r attempts to predict whether there is a linear correlation between two variables. Positive 1 indicates that there is a total positive correlation, 0 indicates that there is no correlation, negative indicates that there is a total negative correlation. The Pearson's R between the Oral Thermometer and the Spree Band during Pre-Workout, during Workout, and Post-Workout were all incredibly small values which were no where close to either positive one or negative one. The Pearson's R between the Pulse Ox and the Spree Band for the Pre-Workout, during Workout, and Post-Workout were on the other hand very close to positive one. This indicates that there is no correlation between the Oral Thermometer and the Spree Band and there is a positive correlation between the Pulse Ox and the Spree Band. The Student's T-Test and the Pearson's r agree with each other. Both the T-Test and the Pearson's r indicate that there is no relationship between the Oral Thermometer and the Spree Band, and that there is a relationship between the Pulse Ox and the Spree Band. These results demonstrate the efficacy of the Spree Band at measuring Heart Rate (as seen by Pulse Ox vs Spree Band), and that the Spree Band is not effective at measuring temperature (as seen by Oral Thermometer vs Spree Band). Graph