It’s in the Glossary, I explain it as overall hardness, even that internal hard dick feeling. 100% EQ is the hardest you can be. I estimate now different since water pumping, as I have never been this hard in my life. It has changed for me, I was at 96% in my prime and 98-100% now in my mid-40s with water pumping. 30s through 40’s dropped to 80-90%