"That's enough."
Duan Mu nodded at the patient on the bed, paying no attention to the patient's and nurse's thanks as he sank into thought.
Most of his previous treatment targets had been ordinary people from Rukongai, so he had never had much opportunity to study the spiritual bodies of Soul Reapers. This round of treatment, however, was an excellent opportunity. With no breaks between treatments, he had practically examined the physical condition of every patient.
His primary subject of study was the Core of Spiritual Pressure that Soul Reapers possessed, something ordinary people lacked.
According to Kotetsu Isane, even if ordinary people lived within the Seireitei, the dense spirit particles would enter their bodies with every breath. Once the spirit particles passed through the Core of Spiritual Pressure, they would be converted into Spiritual Power.
If the Core of Spiritual Pressure was compared to a human heart, then as long as it continued beating, it would continuously produce Spiritual Power within the body.
However, the density of an individual's soul imposed an upper limit on the Spiritual Power produced this way. The denser the soul, the faster it produced Spiritual Power, and the faster Spiritual Pressure recovered.
Once that upper limit was exceeded, Soul Reapers could passively—or actively, through faster methods—increase the density of their Spiritual Power, converting the Spiritual Power they produced into high-density Spiritual Power: what was commonly known as Spiritual Pressure.
But ordinary people, who could not perform that conversion, would certainly die once they exceeded that limit.
Duan Mu's study of the Core of Spiritual Pressure was not meant to cure ordinary people whose cores had developed problems. Rather, after hearing Isane's explanation, a thought had suddenly occurred to him.
Could he speed up the pace of breathing and circulation, thereby rapidly increasing the strength