The minutes, hours, days and weeks blurred together as his training continued. He had not been pushed to the extent that he had been when he was overcoming Dragons Might, but that did not mean this was any easier.
Cassandra was very meticulous about making sure he always remained in peak performance condition. From getting enough sleep, to eating nutritionally rich foods, to specialized massages to allow his muscles to recover quickly, to many more things, she made sure that he could always push further, which was a strange mix of exhausting and refreshing.
At some point, Lex ended up informing Cassandra that his cultivation technique helped him acclimatize to harsh conditions. He obviously did not tell her the details and extent of his techniques capabilities, but just even that was amazing. She then proceeded to add cultivating in increasingly hazardous conditions to the schedule.