Based on the context and the answer, generate a question. 

Context: Earlier today I tried a simple form for 10 minutes : sit straight up , close your eyes , and pay close attention to every breath . The first couple of minutes felt like an eternity ; I was n't sure I would last for ten . It felt like my heart was beating too fast or too hard ; it was pretty uncomfortable .

Answer:

They were exercising .



Why was the narrator focusing on their breath ?