Elder Jeffrey R. Holland:
Preoccupation with [physical appearance] is more than social insanity; it is spiritually destructive, and it accounts for much of the unhappiness young women face in the modern world. One would truly need a great and spacious makeup kit to compete with beauty as portrayed in media all around us.
I plead with you young women to please be more accepting of yourselves, including your body shape and style, with a little less longing to look like someone else. We are all different. Some are tall, and some are short. Some are round, and some are thin. And almost everyone at some time or other wants to be something they are not! But as one adviser to teenage girls said: “You can’t live your life worrying that the world is staring at you. When you let people’s opinions make you self-conscious you give away your power. … The key to feeling [confident] is to always listen to your inner self—[the real you.]” And in the kingdom of God, the real you is “more precious than rubies.” Every young woman is a child of destiny and every adult woman a powerful force for good.
We should all be as fit as we can be—that’s good Word of Wisdom doctrine. That means eating right and exercising and helping our bodies function at their optimum strength. We could probably all do better in that regard. But I speak here of optimum health; there is no universal optimum size.