Super-fast twitch type iib muscle can have "profound effect" on metabolism and body fat

"the results from the current study indicate that modest increases in type IIb skeletal muscle mass can have a profound systemic effect on whole-body metabolism and adipose mass."

"increased type II muscle mass attenuates the pathological consequences of excess adiposity on whole-body metabolism."

"These findings indicate that type II muscle has a previously unappreciated role in regulating whole-body metabolism through its ability to alter the metabolic properties of remote tissues."

Fast/Glycolytic Muscle Fiber Growth Reduces Fat Mass and Improves Metabolic Parameters in Obese Mice

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2828690/