"They’re hoping their next study will help identify the novel proteins, known as myokines, that the type II muscle fibers are using to communicate with other tissues involved in metabolism. These myokines could one day become therapeutic targets for the treatment of metabolic diseases. In this next round of experiments, the researchers will also manipulate the Akt1 gene in older mice, to study the impact it may have on the normal metabolic effects of aging — specifically loss of type II muscle fiber and increased body fat and metabolic dysfunction — that occur in mice as well as humans."

It was a gene study, I doubt Arnold was in on it.