If lifts are increasing rapidly that may account for some of it. ANother thing is that cartiledge/tendons/ligaments are capable of holding a lot of water, it lends to flexability. When on cycle perhaps you hold a lot of water and its helping by allowing these tissues to store more water.
For me however, I usually feel stiff and that my joints are dry, no pain or anything just kind of stiff, but we are all different.