The first knee pain exercises are bridges, clamshells, and a four way hip lying down. These not only work your knees, but your hips as well.
Bridges with a band make your muscles work together to help them stay balanced. Sometimes when you have an injury, the muscles become imbalanced, and don’t work together.
Sit to stand, heel/toe raises, and single leg balance exercises work your hips, knees, and ankles. All these areas need to be strong to help your knees stay strong and decrease the knee pain.