The phrase "be on one's back" typically refers to being bedridden or incapacitated due to illness or injury. Its antonyms, therefore, are words that connote physical or mental wellness and mobility. These antonyms include "be up and about," "be on the go," "be on the move," and "be active." Other antonyms could focus on emotional health or vitality, such as "be in high spirits" or "be energized." Overall, the antonyms for "be on one's back" celebrate the ability to move, function, and thrive - qualities that are vital to a healthy and fulfilling life.
