Pool exercise is an activity that involves swimming in a pool. It can involve swimming laps or other exercises such as water aerobics. The two crossword solutions for the term 'pool exercise' are 'SWIM' and 'laps'. Swimming laps is a popular form of pool exercise, where the swimmer swims back and forth in the pool for a set amount of time. Water aerobics is another form of pool exercise, which involves performing exercises in the pool such as jogging, jumping, and stretching.