Neet idea to collect our own data!

What if we all bought a little heart rate monitor that we can wear for a couple days. we can carry a booklet and write down our heart rate every 15 minutes and describe our circumstances. just in our daily activities. Or we can create a root that brings us around certain areas while traveling and set a destination time to add the pressure and mark down our heart rate every 1-2minutes. we can do this maybe 2 or 3 days. Then we can create something using our findings. We could maybe so this in a certain area that we want to map.