Warming up with 5 minutes of low-impact aerobics, such as walking or riding a stationary exercise bike.

Quadriceps Strengthening

Quad Strengthening Contractions:
Sit in chair. Extend legs, heels to floor. Keep knees straight (or as straight as possible if you have arthritis.) Tighten thigh muscles. Hold for count of 10. Relax for count of 3. Do 10 repetitions. You can do this several times throughout the day. You can build up to 2 or 3 sets of 10 repetitions at a time.

Quad Strengthening Leg lifts:
Lie flat on back. Bend left knee at 90-degree angle, keeping foot flat on floor. Keeping the right leg straight, slowly lift it to the height of the left knee. Hold for a count of 3. Repeat 10 times. Switch sides. Work up to 10 sets of 10 over several weeks.

Safety Tip:
Leg lifts: Lifting both legs at the same time causes excessive stress on your lower back so
only lift one leg at a time; the opposite leg should be kept slightly bent with foot on floor.

Quad Strengthening Short-Arc Leg Extensions:
Sit or lie on floor. Place a rolled up towel under your thigh for support. Keep you leg straight and raise your foot about six inches off the floor. Hold for 5 seconds. Slowly lower your foot, bending your knee. Do 10 repetitions. Switch sides.

Quad Strengthening Knee Dips:
Stand with knees slightly flexed. Point your toes straight ahead.
Make sure your kneecaps are also pointed straight ahead.
Lift one leg up and balance on the other leg. Slowly lower yourself up and down ONLY a few inches.Keep the knee of the leg you are balancing on slightly flexed. Your knees must remain pointing straight forward. Do not let them turn inward. Stand straight, do not lean you body to one side. Do 10 dips. Switch sides.
If you feel pain in your knees, start with fewer dips.

Hamstring Strengthening

Hamstring Strengthening Contractions:
Sit in chair, heels on floor. Don't move heels but pull back on them. You will feel tension in you hamstrings. Hold for count of 10. Relax for count of 3. Do 10 repetitions.

Hamstring Strengthening Curls:
Lie on stomach. Place left foot onto the back of the right heel. Slowly pull your right heel toward your buttocks - resisting with the left leg. This contracts the hamstrings. Hold for a count of 10. (Keep pressing your left foot and right heel against each other) Hold for a count of ten and relax for count of 3. Do 10 repetitions.

Walking backwards helps to develop the hamstrings. When walking backwards, your weight is distributed more evenly, resulting in less strain on your knees.