In one study, published in the International Journal of Neuropsychopharmacology, the brain cells in the hippocampus doubled in adult rats that exercised on running wheels.

• 一项发表在国际神经精神药理学杂志上的研究显示，在滚动的车轮装置上训练过的成年鼠海马状突起脑细胞增加了一倍。