Context: It is like suddenly being super strong LOL . The feeling wears off after a while and I imagine it is just the nervous system adjusting after swing the heavy object around . What I ca n't get over is how hard the work is for my core .
Question: What may be the reason they know it 's hard work for their core ?
Option 0: None of the above choices .
Option 1: Because someone told them it is .
Option 2: Because they are feeling stronger .
Option 3: Because their appetite has increased .
Answer: 0