Exercise

Most newer ships and some older ones have well-equipped fitness centers, many with massage, sauna, and whirlpools. An upper-deck fitness center often has a view of the sea; an inside, lower-deck health club is often dark and small unless it is equipped with an indoor pool or beauty salon.
Many ships have full-service exercise rooms with bodybuilding equipment, stationary bicycles, rowing machines, treadmills, aerobics classes, and personal fitness instruction. Some ships even have structured, cruise-length physical-fitness programs, which may include lectures on weight loss or nutrition. These often are tied in with a spa menu in the dining room.

Spas have become increasingly popular on cruises. They may have giant thalassotherapy pools (a combination Jacuzzi and massage), indoor heated swimming pools, and treatment rooms. The list of treatments may include ionotherapy, aromatherapy, hydrotherapy, and reflexology. The spas may also sell beauty products not available at home.