If something is balanced, it has equal proportions or a stable sense of balance. A balanced yoga pose is one in which you're not falling over constantly.
A balanced gymnast won't fall off the balance beam, and a balanced team combines players' skills to form a stable, equitable group. Balanced information in a news report gives you the opposing sides of an issue, and a balanced diet includes some food from all the different nutritional groups. Balanced comes from the verb balance, "be equal with," from the noun form of the word, with its Old French root, balance, "scales for weighing."