Kettlebells are relatively new in the world of equipment and strategies for improving sports performance, but they are effective. The term "power-endurance" refers to how well your body can create explosive movements over time. Most exercises using kettlebells are variations on Olympic lifts, but modified for lower weight and more repetitions. Still, these exercises will train the muscles to be more capable of explosive movements over extended time periods.
The combination of quick lifting and high repetitions that are the hallmarks of kettlebell exercises. "Kettlebell Clusters" are among the types of kettlebell workouts designed to boost power-endurance. Here's an example of a kettlebell cluster workout:

• 1 kettlebell snatch followed by a 20-second rest
• 1 kettlebell clean and jerk followed by a 20-second rest
• 1 kettlebell push press followed by a 20-second rest

Repeat this cluster as many times as desired, depending on your fitness level and goals.
By contrast, "Kettlebell Couplets" are workouts in which you alternate sets of one pair of exercises, one kettlebell and one other exercise. This pattern lets one set of muscles recover while the other is working. For example, alternate sets of kettlebell swings with push-ups, starting with 6 reps, then decreasing to 5, then 4, 3, 2, and 1.
Once you feel comfortable with kettlebells, you can try "Kettlebell Complexes." This type of workout combines distinct movements into a set. The goal is to complete a full complex before resting. An example of a kettlebell complex: 5 reps of kettlebell snatches, followed immediately by 3 reps, then 1 rep Proceed immediately to a 5, 3, 1 series of the kettlebell clean, and then a 5, 3, 1 series of the kettlebell swing. You can then rest and repeat the complex or complete another complex with different moves.