The exception: those 30-minutes-a-day-for-a-decade users, in whom the risk of glioma indeed increased 40 percent.
Steven C. Moore et al., "Height, Body Mass Index, and Physical Activity in Relation to glioma Risk."
glioma gli·o·ma (glē-ō'mə, glī-)
n. pl. gli·o·mas or gli·o·ma·ta (-mə-tə)
A tumor that originates in the neuroglia of the brain or the spinal cord.