How long does exercise therapy take to work for knee osteoarthritis?

The pace varies with knee strength, stiffness, pain sensitivity, activity demands, sleep, and how regularly the programme is completed. Progress may first appear as standing up more easily, better control on stairs, or longer comfortable walks. The aim is improved function and symptom management, not instant removal of the underlying joint changes. A flare does not automatically mean the exercises have damaged the knee, but repeated flares suggest that the dose or technique needs adjustment.

Use the technique demonstrated by your physiotherapist and keep the effort within the agreed range. Strengthening the thigh and hip muscles, practising balance, and maintaining knee movement can support everyday tasks. Break activity into manageable periods on difficult days, then return gradually to your routine. Note pain during the exercise, later that day, and the following morning; this gives your therapist useful information for progression. Supportive footwear and a suitable warm-up may also make practice more comfortable.

Arrange a review if the knee repeatedly locks, gives way, becomes increasingly swollen, or cannot tolerate the prescribed programme. Get urgent help after an injury that leaves you unable to bear weight, or if the knee is hot and swollen with fever. New calf swelling, chest pain, or sudden breathlessness also needs urgent medical attention.

Which exercise should be reduced during a flare? What change in stair use or walking would show that therapy is helping? Should I use a stick temporarily, and how should it be fitted?