The antonyms for the phrase "be laying" include standing, sitting or walking. 'Be laying' means to lie down or rest in a horizontal position. The opposite of this action involves standing upright or sitting down. In some cases, walking may also be considered as an antonym for 'be laying'. These opposing actions typically require different levels of physical exertion and demand a different reaction from the muscles and joints of the body. Whether we are laying down, sitting, standing or walking, it is essential to find a balance between rest and activity to maintain a healthy lifestyle.