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The Best and Worst Exercises for Your Knees. Here’s what to do if achy knees limit your ability to

Some things get better with age—wine, parenthood, and Jane Fonda, to name a few. Unfortunately, your knees are not one of them.

“Overuse is one of the main causes of knee pain,” says Lisa Woods, a personal trainer and yoga teacher in Colorado. And the older we get, the more we’ve used them.

It’s a similar story for those with osteoarthritis, which affects 10 percent of men and 13 percent of women aged 60 and older. “Osteoarthritis is a form of arthritis caused by inflammation, breakdown, and the eventual loss of cartilage in the joints,” Woods says. “This happens over time, so it makes sense that most people affected are over 50.”

The list of knee injuries that often coincide with aging is long, says Douglas Ebner, D.P.T., a physical therapist at The Ohio State University Wexner Medical Center. It includes patellofemoral pain syndrome, or pain in the front of the knee; meniscus tears and degeneration, where certain tissues in the knee are torn; and iliotibial band syndrome, in which the ligament that runs along the outside of the thigh and attaches to the knee is tight or inflamed.

Whether you’ve already been diagnosed with these conditions or you’re hoping to prevent age-related aches and pains, certain exercises can help or hurt. Here are the dos and don’ts of working out to protect your knees.

The Best Exercises for Bad Knees

The most effective way to alleviate pain in your knee joints is simply to get moving, Woods says. “Walking, water aerobics, cycling, swimming, yoga, and strength training all help improve the symptoms associated with arthritic knee pain and knee pain in general.”

The best type of movement for you depends on the source of your pain. For example, if your knee pain is caused by inflammation, like with osteoarthritis, water aerobics and yoga are especially good choices, Woods says. “Being in the water reduces the impact on the knee joint,” she says. “Yoga provides stretching and bodyweight strength exercises, which can benefit the knees and the person’s overall well-being.”

If your pain is the result of an acute injury, Woods recommends strength training and balance exercises to assist with strengthening the knees post-recovery and rehab. “Access to a gym and the use of the weight machines are helpful,” she says. “However, bodyweight squats and straight leg raises are good options that can be done at home.”

The best exercises for your knees may also depend on your lifestyle. “If someone sits a lot, they need to do exercises that will allow the knee joint to extend,” Woods says. This could be as simple as a seated leg extension in which you lift the knee and extend the leg. One caution: People with arthritis or pain at the patella (kneecap) may want to avoid extending their legs past a 45-degree angle, Ebner says.

In contrast, someone who stands most of the day needs to give their knees a chance to bend. To do so, simply lift one heel and then the other toward your backside while standing—like you’re trying to kick yourself in the rear. Alternate from side to side a few times, and repeat the exercise every day.

No matter your type of knee pain or lifestyle, Woods highly recommends self-myofascial release, in which you use your own body weight to massage the soft tissue around the knee with a foam roller. “Foam rolling can be very beneficial for those suffering from chronic knee pain,” Woods says. “The challenge is getting to the floor to do it.”

If you’re unable to easily move to the floor and back up, try this modification: Grab two tennis balls, and sit in a chair. Slowly roll the balls up and down your thighs while applying some pressure. Perform this exercise for at least one minute, and repeat it as often as desired.

Remember to think outside your knees, too. People with bad knees should aim to strengthen their hips, Ebner says. Doing so will provide better support for the knees. He recommends the following four hip-strengthening exercises:

1. Resistance-Band Side Steps Loop a resistance band either above your knees (least resistance), below your knees (medium resistance), or around your ankles (greatest resistance). Bend knees slightly with your feet hip-width apart. Step to the side until the band provides resistance, then slide your other foot over to re-create your original stance. Repeat this sidestepping movement for 10 to 15 feet in one direction (or as far as you can), and then cover the same distance in the other direction.

2. Clamshell External Hip Rotations Lie on your left side on the floor, with your hips and knees bent 45 degrees. Your right leg should be on top of your left leg, heels together. Keeping your feet in contact with each other, raise your right (top) knee as high as you can without moving your pelvis. Pause, then return to the starting position. Don’t allow your left (bottom) leg to move off the floor. As the name suggests, think of a clamshell opening as you do the exercise. Aim for 15 to 20 reps per side.

3. Glute Squeezes Stand with feet shoulder-width apart. Squeeze your glutes as tightly as you can for four seconds. Release and repeat for 10 to 12 reps total.

4. Quad Sets Sit on the floor with one leg straight out in front of you. Your other leg may be bent with foot flat on the floor for support or also straight. Tighten the muscles on top of your thigh by pressing the back of your knee flat down to the floor. Hold for about six seconds, then rest up to 10 seconds. Aim for 8 to 12 reps. If you feel discomfort under your kneecap, try putting a small towel roll under your knee during this exercise.

The bottom line: Low-impact aerobic exercise, self-myofascial release, and hip-strengthening moves like those above make up a powerful trifecta to help accommodate and even alleviate chronic knee issues.

So that’s what you should be doing, but it’s equally important to know what to avoid.

The Worst Exercises for Bad Knees

The worst exercises for knees may depend on the knees in question, Woods says. “It truly depends on the individual, the surface, the shoes, and the fitness level.”

That’s why it’s always a good idea to talk to a medical professional about which types of movement you absolutely shouldn’t be doing. Still, there are a few exercises that anyone with bad knees should shun, Ebner says, including the following.

1. W Sit and Hurdler Stretch “W sitting is normally seen in children, but has also been adopted by athletes to stretch hip internal rotators and quadriceps,” Ebner says. “The hurdler stretch is a similar stretch focusing on one leg at a time. Both stretches are bad because of the large amounts of torque applied to the knee, hip, and ankle.”

2. Knee Valgus Squats and Lunges You know you shouldn’t allow your knees to collapse inward as you lower into a squat, but do you know why? “Squatting with the knees coming together does not equally load the joint, which causes excessive wearing of the knee,” Ebner says. “Besides the unequal loading, this movement pattern can lead to ACL tears and does not lead to strong and powerful legs.”

It applies to lunges, too. “The knee collapsing inward in a lunge position can be related to poor core control, hip strength, and trunk stability,” Ebner says. When performing squats and lunges, think about pressing your knees outward slightly. This will help you maintain proper alignment while also activating your glutes.

3. Lunges in Which the Knee Passes Over the Toe “If the knee goes past the toes when lunging, the compressive forces at the kneecap increase significantly,” Ebner says. This can cause grinding and irritation in the knee joint. If you’re not sure about your alignment, ask a friend or trainer to snap a photo of your profile while performing a lunge. Your knee should be directly above your toes.

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