Anaerobic metabolism uses which of the following fuels

Anaerobic metabolism uses carbohydrates, primarily glucose as fuel. It is the enzymatic conversion of glucose to lactate  or pyruvate resulting in energy that is stored in a form called ATP. 

This process usually occurs in the muscles when an organism needs a sudden, short-term burst of energy or during periods of intense exertion or activity.

During anaerobic or non-oxygen conditions, muscles cells must rely on other reactions that do not require oxygen to fuel muscle contraction. The term anaerobic simply refers to the absence of oxygen.

it may have problems procreating.