The term 'TROTS ALONG' can be solved by the word 'JOGS', which is a four-letter word. Jogging is a form of aerobic exercise in which a person runs at a slow and steady pace for an extended period of time. It is a popular form of exercise because it is low impact, meaning that it does not put too much strain on the body. Jogging is also a great way to stay in shape and improve cardiovascular health.