Endurance is your ability to sustain a cardiovascular activity for a long period of time. An example of a cardio activity would include swimming, jogging, biking and walking. And while these activities do require some degree of exertion, they don’t not require a lot of muscular strength.
There are plenty of ways to increase endurance. You could go for a long run, swim every morning before work or school, or simply enjoy a long walk. But if cardio endurance is not required by your sport of choice, then it may be a better idea to develop endurance in different ways. You could do a series of lifts with a minimum of rest or do a series of plyometric exercises.
Stamina is your ability to sustain effort for a long period of time. And this effort usually requires a lot of muscular work. Stamina can refer to your ability to get up off the offensive line of scrimmage to block or it can refer to your ability to throw 100 pitches in a game. Stamina is best developed with repeated lifts and explosive exercises. Stamina is more of an anaerobic approach to endurance, where you exert yourself to the point of breathing heavy in a short period of time.