The term 'REMAIN IN GOOD SHAPE' can be broken down into two crossword solutions: LAST (4 letters) and REMAIN (7 letters). The term 'LAST' is an adjective that means to continue to exist or REMAIN in the same state. It can also mean to endure or persist over time. The term 'REMAIN' is a verb that means to stay in the same place or condition, or to continue to exist. Together, the two terms suggest that one should stay in good physical shape and maintain their health over time.