Power Endurance Training improves our ability to generate a consistent sub-maximal level of power over a specific time period. The amount of power generated will dictate the length of time it can be sustained with submaximal efforts between 10-60s and aerobic efforts over 1 minute. Power Output and Endurance are inversely related so keep that in mind.
Maximum Power is the maximum rate of force production with a specific movement pattern. Using Post-Activation Potentiation is an excellent way to produce higher rates of force.