<human>: Here is a goal: Stand straighter

Which way makes more sense to accomplish this goal?

OPTIONS:
- Walk with books on your head for 15 min twice a day until it becomes a habit.
- Go to a chiropractor that owns a stretching machine and lay in it while he gently and carefully stretches your back.
<bot>: Walk with books on your head for 15 min twice a day until it becomes a habit.