Sailors should maintain a well-rounded level of fitness at all times. This would include targeting such areas as cardiovascular endurance, building upper body and core strength, increasing flexibility, and working on grip strength and agility. Sailors also benefit from mental fitness with an emphasis on adaptability, stamina, and mental endurance. Sailors must also be strong swimmers to deal with potential emergencies that may be required during a capsize or having to enter the water to assist in a lifesaving situation.