They did MRIs of their brains before and after. They also measured the fitness of each volunteer by measuring oxygen volume before and after the training program.

• 他们对受试者锻炼前后的大脑进行了核磁共振成像扫描。他们还通对测定每位志愿者在训练前后的血氧含量对其健康状态进行了衡量。