Parents have always nagged us about practicing good posture, but how many of us actually listened to them? While there isn’t one position that suits all, there are some general guidelines for sitting comfortably that won’t compromise your posture. Why Is Good Posture Important? According to UCLA Health, good posture is essential because it helps you keep your spine aligned while moving and sitting. If you’re someone who’s used to sitting in weird ways, it might not be easy to get used to these habits.