Anaerobic exercise in the context of "Aerobic exercise"

Endurance (also related to sufferance, forbearance, resilience, constitution, fortitude, persistence, tenacity, steadfastness, perseverance, stamina, and hardiness) is the ability of an organism to exert itself and remain active for a long period of time, as well as its ability to resist, withstand, recover from and have immunity to trauma, wounds, or fatigue.

The term is often used in the context of aerobic or anaerobic exercise. The definition of "long" varies according to the type of exertion – minutes for high intensity anaerobic exercise, hours or days for low intensity aerobic exercise. Training for endurance can reduce endurance strength unless an individual also undertakes resistance training to counteract this effect.

Strength training, also known as weight training or resistance training, is exercise designed to improve physical strength. It may involve lifting weights, bodyweight exercises (e.g., push-ups, pull-ups, and squats), isometrics (holding a position under tension, like planks), and plyometrics (explosive movements like jump squats and box jumps).

Training works by progressively increasing the force output of the muscles and uses a variety of exercises and types of equipment. Strength training is primarily an anaerobic activity, although circuit training also is a form of aerobic exercise.

Middle-distance running events are track races longer than sprints, ranging from 500 metres up to two miles (3,218.688 metres). The standard middle distances are the 800 metres, 1500 metres and mile run, although the 3000 metres may also be classified as a middle-distance event. The 1500 m came about as a result of running 3+3⁄4 laps of a 400 m outdoor track or 7+1⁄2 laps of a 200 m indoor track, which were commonplace in continental Europe in the 20th century.

Middle-distance running is unique in that it typically requires attributes found in both sprinters and long-distance runners, including combinations of both footspeed and aerobic endurance. Middle-distance racing is commonly reported to be a highly intense physical experience, requiring large amounts of anaerobic exertion from the body.

The 1500 metres or 1500-metre run is the foremost middle distance track event in athletics. The distance has been contested at the Summer Olympics since 1896 and the World Championships in Athletics since 1983. It is equivalent to 1.5 kilometers or approximately 15⁄16 miles. The event is closely associated with its slightly longer variant, the mile run, from which it derives its nickname "the metric mile".

The demands of the race are similar to that of the 800 metre run, but with a slightly higher emphasis on aerobic endurance and a slightly lower sprint speed requirement. The 1500-metre run is predominantly aerobic, but anaerobic conditioning is also required.

The 3000 metres or 3000-metre run is a track running event, also commonly known as the "3K" or "3K run", where 7.5 laps are run around an outdoor 400 m track, or 15 laps around a 200 m indoor track.

It is debated whether the 3000 m should be classified as a middle-distance or long-distance event. In elite-level competition, 3000 m pace is more comparable to the pace found in the longer 5000 metres event, rather than mile pace. The men's world record performance for 3000 m equates to a pace of 58.34 seconds per 400 m, which is closer to the 60.43 seconds for 5000 m than the 55.46 seconds for the mile. However, the 3000 m does require some anaerobic conditioning, and an elite athlete needs to develop a high tolerance to lactic acid, as does the mile runner. Thus, the 3000 m demands a balance of aerobic endurance needed for the 5000 m and lactic acid tolerance needed for the mile.

Endurance training is the act of exercising to increase endurance. The term endurance training generally refers to training the aerobic system as opposed to the anaerobic system. The need for endurance in sports is often predicated as the need of cardiovascular and simple muscular endurance, but the issue of endurance is far more complex. Endurance can be divided into two categories including: general endurance and specific endurance. Endurance in sport is closely tied to the execution of skill and technique. A well conditioned athlete can be defined as, the athlete who executes their technique consistently and effectively with the least effort. Key for measuring endurance are heart rate, power in cycling and pace in running.