Sore knees? What brings relief and what actually lasts

You take the stairs and your knee complains. You get up after sitting for a while and it takes a few steps to loosen up. Plenty of people past a certain age write this off as the price of getting older. That's only partly true, and what you do with that knee matters more than you might think.

In 2026, Women's Health ran a feature on knees and aging. Abigail Campbell, an orthopedic sports medicine surgeon at NYU Langone, called strength training the antidote for all types of knee pain. The magazine also pointed to a review in The BMJ that ranked aerobic exercise first.

If you have arthritis in your knee, chances are someone has sent you to a physical therapist who worked on the joint by hand. That hands-on work feels good. The real question is whether it adds anything to exercise, and for how long.

Knee osteoarthritis in a nutshell

Osteoarthritis means the cartilage that caps the ends of the bones inside the joint is wearing away. The knee aches and stiffens, and climbing stairs or getting out of a chair gets harder. There's no cure. Pain and the way you move can still get a lot better.

Age isn't the whole story, either. Campbell noted in the same piece that past injuries and genetics play a part. And in October 2026, mindbodygreen covered a Washington University analysis of UK Biobank data. Sleeping less than six hours a night was linked to a higher risk of knee osteoarthritis than sleeping seven. That study was observational, so it shows a link, not a cause.

What 29 trials found about hands-on therapy

The European Journal of Pain published the review in October 2026. It comes from da Silva and colleagues in the physical therapy department at the Federal University of São Carlos in Brazil, who pooled 29 randomized trials in people with knee osteoarthritis. Each one compared exercise alone with exercise plus manual therapy, meaning the techniques a physical therapist applies with their hands.

Adding the hands-on work helped. People who got both had less pain than those who only exercised, right after treatment and again in the short and medium term. They also moved better in the short and medium term. In other words, manual therapy seems to give you a boost early on, though the evidence for most of these time points is very low certainty.

A boost that fades

Now for the part that matters most. Over the long term, the review found no significant added effect of manual therapy on either pain or function. By then, the early boost had worn off. What both groups shared was exercise.

The authors put it plainly. Manual therapy can be considered an add-on, most useful at the start of rehab, because its relief seems to be short-lived. They also flag that the certainty of the evidence is low or very low for almost every comparison. Only medium-term pain reaches moderate certainty.

The exercise with the strongest backing

If manual therapy is the jump start, exercise is the engine. In 2025, The BMJ published a network meta-analysis by Yan and colleagues at Zhejiang University School of Medicine in Hangzhou, covering 217 randomized trials and 15,684 people with knee osteoarthritis. A network meta-analysis compares every type of exercise against every other type, not just against doing nothing.

Aerobic exercise, anything that gets your heart rate up, was the most likely to come out on top for pain, function, walking and quality of life, with moderate certainty. Compared with control groups, it probably cut pain a great deal at four and twelve weeks. Strength work and mixed programs probably gave large gains in function at twelve weeks.

Safety got less attention. Only 40 of the trials, or 18%, reported on side effects, and among those there were no clear differences between exercising and not exercising. That's reassuring, but it's not the full picture.

How much strength work, and how heavy

For lifting, there's a practical takeaway. In 2026, the Journal of Orthopaedic & Sports Physical Therapy published a meta-analysis by Núñez-Cortés and colleagues. It pooled 20 trials involving 791 people with knee osteoarthritis that tested programs made up only of leg strength exercises. Strength training may ease pain, improve function and build muscle strength, though the certainty was low to very low.

The interesting part is the load. Very light to moderate intensities brought the biggest drop in pain, while moderate intensity brought the biggest gains in function. You don't have to go all out. Home programs and center-based programs both worked, and the center-based ones worked better. To figure out what moderate looks like for you, see our guide on how much weight to lift at the gym.

What these studies don't prove yet

First, certainty. In the manual therapy and strength reviews it's low or very low for almost every result, while in The BMJ review it's moderate for the main results and low for several of the 24-week ones. Second, timing: the longest follow-up in The BMJ meta-analysis was 24 weeks. That tells you about the coming months, not about your knee many years from now.

Third, who was studied. These were people already diagnosed with knee osteoarthritis, not someone with a twinge after a run. And the sleep study only finds an association, so it doesn't prove that more sleep protects your knee. If your knee swells, locks or wakes you up at night, have a doctor check it before you start strength work.

Your knee plan, starting Monday

If you're seeing a physical therapist, use those sessions for what the evidence says they do well: bringing the pain down enough that you can start moving. Ask which exercises to do at home between visits. That's the part that stays with you once the sessions end.

Add three days of aerobic exercise a week, such as brisk walking, a stationary bike or swimming. Build up gradually toward the 150 minutes a week recommended by the American Heart Association, as Women's Health pointed out. We've already covered why walking faster beats piling up steps.

On two more days, do leg strength work at a moderate intensity: step-ups, sit-to-stands without using your hands, glute bridges and heel raises. Physical therapist Winnie Yu told the magazine to finish each set with two reps in reserve. At Gym Triple X you can fit both into one visit, bike first, then strength.

Working out which exercises your knee tolerates, and when to add load, is easier with someone who watches you move and adjusts the plan week by week. If you'd rather have company along the way, a personal trainer on the Costa del Sol can build that progression with you, one step at a time.