Meditation may be one way to care for your mental health, but for those who would rather find their own version of peace and serenity through punches and kicks, a Tokyo gym owner might have the answer.

Former world champion kickboxer Akeomi Nitta says that, just as the body needs stimulation to prevent physical decline, the brain needs stimulation to prevent cognitive decline and martial arts training is an opportunity to achieve both at once.

"Kickboxing is a full-body workout that engages every muscle group in your body. Of course, the physical benefits are thrilling, but the mental rewards you reap are even greater," says Nitta, head trainer and owner of a bustling chain of kickboxing gyms.