Small Intestine, mainly Jejunum and Ileum
Since there are no options listed to choose from, my best guess would be watches, since a lot of apple watch products are now sold with built in heart monitors.
First yes i normally exercise then i found ur workout plan entertaining and get u staying in fit because all of it is using ur muscles and it keeps u fit no i would not make any adjustments because all of this is what will get u big and strong and to do more things in life the exercise would make me feel more confidence and be more stronger the last thing is yes i would be continuing the exrcises as u heard me through out my whole answer so do i get brainliest.
I know one is to get tested. Another could be to use protection that could prevent that kind of stuff. Then if you're already infected, you should tell your partner. And if you do sleep with your partner while infected, tell them to get tested.
Crunches
In my educated opinion, crunches would be the best choice out of these options to build strength. A one mile run builds cardio, sit and reach and gymnastics build flexibility and some strength, crunches is strictly abdominal strength.