Table 1 Knee strengthening exercise program for patients with KOA.

Knee extensors-open kinetic chain

Level 1

Isometric quads sets

3

10

Progress to level 2 when 3 sets of 10 is no longer challenging, and the patient is performing the activity with ease and good form

Level 2

Terminal knee extension

3

10

Progress to level 3 when 3 sets of 10 are no longer challenging, and the patient is performing the activity with ease and good form

Level 3

Terminal knee extension with weight

3

10

The weight was increased to 2 kgs depending upon the ease of the patient

Knee extensors-closed kinetic chain

Level 1

Terminal knee extension in standing with resistance band

3

10

The level of the resistance band is progressed sequentially progressing to squats

Level 2

Supported half Squats

1

10

Deep squats with reduced weight

Level 3

Step-ups with the affected limb

1

10

Progress to 13 cm step if knee pain was not increased

Hip extensors strengthening

Level 1

Supine glut sets

3

10

Progress to level 2 when 3 sets of 10 is no longer challenging, and the patient is performing the activity with ease and good form

Level 2

Supine bridging

3

10

Progress to level 3 when 3 sets of 10 are no longer challenging, and the patient is performing an activity with ease and good form

Level 3

Supine unilateral bridging

3

10

A 1 kg weight cuff was added when the patient was doing it with ease

Knee flexors strengthening

Level 1

Prone hamstrings curl up to 90 degrees

3

10

Progress to level 2 when 3 sets of 10 are no longer challenging, and the patient is performing the activity with ease and good form

Level 2

Prone hamstrings curl with a weight

3

10

Progress to level 3 when 3 sets of 10 are no longer challenging, and the patient is performing the activity with ease and good form

Level 3

Standing hip extension with resistance band

3

10

The resistance of the band was increased when the patient was able to perform the exercises well