It would be heart. I hope this helps
It is possible to have brain surgery bot sometimes it's not wealthy for that person
True why around 70 percent of people actually have trouble sleeping ps including me
-Sit ups
-Planks
-Leg lifts( where you lay on the floor with your shoulders off the ground and slowly lift your legs up and down without them touching the ground)
-Crunches
-Russian twist
-Bicycle crunches
There are a lot more but these are the ones that come to mind
