Factors influencing the activities (changes in symptoms)
Most of the participants agreed that their symptoms were variable and
not constant. They referred the increase in symptoms from one day to
another to activities including sit to stand, ascending and descending
stairs, house chores, twisting the knee, sleeping, sitting, walking long
distances, walking uphill and downhill, and standing for a long time.
Being tired or upset, cold weather, and gaining weight were also
reported to increase knee OA symptoms.