Endurance or aerobic activates increase your breathing and heart rate. They keep your heart, lungs and overall your CV system healthy and improve your overall fitness. Building up your endurance makes it easier to carry out many of your everyday activates. Endurance training is a term you would use when you are running, rowling and swimming to name a few, it’s any low intensity, long duration activity.
In other words, strength exercises make your muscles stronger. Even small increases in strength can make a big difference in your ability to stay independent and carry out everyday activities, such as climbing stairs and carrying groceries. These exercises also are called "strength training" or "resistance training.
Circuit training is a form of conditioning combining resistance training and high-intensity aerobics. It is easy to follow and it targets strength building as well as muscular endurance. An exercise "circuit" is one completion of all exercises in the program. When one circuit is complete, one begins the first exercise again for another circuit. Traditionally, the time between exercises in circuit training is short, often with rapid movement to the next exercise. Each exercise usually consists of a different muscle or different muscle group.
Interval training is a method of training where you increase and decrease the intensity of your workout between aerobic and anaerobic training.