The phrase "took a walk" implies movement, but there are several antonyms to this phrase that suggest stillness or inactivity. Some options include "remained seated," "stayed put," "rested leisurely," "lounged around," or "sat idly." Other antonyms might focus on specific types of movement, such as "ran a marathon," "did jumping jacks," or "climbed a mountain." While there are plenty of ways to convey the opposite of taking a walk, it's worth noting that walking itself has a lot of benefits, from physical exercise to mental clarity, so it's not necessarily a behavior to be avoided!