Strength endurance is the ability to perform a near maximal level of strength repeatedly over a period of time.

Strength endurance is the specific form of strength displayed in activities which require a relatively long duration of muscle tension with minimal decrease in efficiency.

Exercises such as hill running or pushing/pulling a sled will work this kind of strength. The movements are difficult and require a significant amount of strength that need to be sustained over time to get the work done. Another good example in the body weight world is the gymnast performing ring strength skills one right after another in a routine.