glycolytic

Fighters need to be ready for different amounts of effort at any moment. Mike Perry trains his athletes for that purpose.
If you participate in sports or gym activities that require high energy outputs for two to three minutes, you need to make sure you are ingesting plenty of carbohydrates.
As a trainer you don't have to be a PhD, but it IS useful to have a working knowledge of the energy systems of the body and how they can be manipulated when designing training programs.