Figure 5.

Lubricin content at the contact, transitional, and non-contact areas and average for all three areas in the control (CON), low- (LIR), moderate- (MIR), and high-intensity (HIR) groups. Similar changes were observed for each area as well as the average: both the LIR and MIR groups had higher lubricin content than the CON group, and significantly lower lubricin content was found in the HIR group compared to the LIR and MIR groups. No statistical difference was found between the LIR and MIR groups. NCA: non-contact area, TA: transitional area; CA: contact area.