The opposite of "am recumbent" is "am active." Being active means to be engaged in physical or mental activity, rather than lying down. Another antonym for "am recumbent" is "am upright." This means to be in a standing or sitting position, rather than lying down. "Am mobile" is also considered an antonym, which means to be able to move around freely. Being mobile is the opposite of being stationary and immobile, which could describe the state of being recumbent. So, while being recumbent has its benefits, being active, upright, or mobile is equally important for maintaining a healthy lifestyle.