Question & Context

Joint pain and stiff joints – what helps?

In brief

For osteoarthritis and load-related joint pain, targeted exercise training is the best-supported remedy, with effects on pain in the same order of magnitude as painkillers. If you are overweight, combining weight loss and training takes considerable strain off the knees. Among supplements, turmeric shows the most convincing data in knee osteoarthritis, collagen small effects from studies close to manufacturers, and glucosamine no clinically relevant effect in the independent studies. In studies, red light improves function in knee osteoarthritis. Hot, swollen or suddenly painful joints should be examined by a doctor promptly.

What matters first

Train in a targeted way

The Cochrane review of 44 trials with 3,537 people with knee osteoarthritis found that exercise therapy lowered pain by 12 points on a scale of 0 to 100 and improved function by 10 points. The authors consider the effect comparable to that of non-steroidal painkillers, and it still lasted months after the end of the program. Individually supervised programs tended to do better than group or home programs.

Lose weight, if needed

In the IDEA trial with 454 older people with overweight and knee osteoarthritis, the participants who changed their diet and also trained lost on average 10.6 kilograms over 18 months. Afterwards they had less pain and better function than the groups with diet only or training only, and the compressive forces in the knee were lower with diet.

Keep moving instead of resting the joint

Stiff joints loosen up through movement. Cycling, swimming, walking and strength training for the muscles around the joint take load off it rather than wearing it out. Pain that subsides quickly after exertion is usually no reason to stop.

Strengthen the muscles around the joint

Strong thigh and hip muscles stabilize the knee. If you have trouble with heavy weights, you can work with light weights and higher repetitions or with blood flow restriction training, ideally with guidance from a physiotherapist.

When you should have this checked by a doctor

Have joint complaints checked by a doctor if a joint suddenly becomes hot, red and badly swollen or fever comes on top, in that case on the same day. Likewise with long-lasting morning stiffness, swelling of several small joints in the hands or feet, pain at rest and at night, unintended weight loss, joint complaints after a tick bite, after an accident, with instability or if the knee locks. Such signs can be caused by gout, an inflammatory rheumatic disease, an infection or an injury, which need targeted treatment. If you regularly need painkillers, you should also have the treatment supervised by a doctor.

Why exercise protects the joint

Cartilage has no blood vessels of its own and is supplied via the joint fluid; movement and changing loads promote this exchange. At the same time, strong muscles take load off the joint and guide it more stably. That is why rest is usually the wrong approach in osteoarthritis.

A program that combines strength, mobility and endurance and is increased slowly works best. Physiotherapy can make starting easier and shows which exercises suit your joint. Regularity is important: in the studies the effect is greatest directly after the program and becomes smaller when you stop.

Turmeric, collagen, glucosamine: what the studies show

Turmeric has the most solid data among supplements in knee osteoarthritis. A network meta-analysis of 23 trials with 2,175 patients found less pain and better function than with placebo, and in a trial with 367 patients a turmeric extract was not inferior to ibuprofen over 4 weeks, with fewer stomach complaints. Overall study quality is moderate, and rare liver damage has been described with highly bioavailable products.

Collagen peptides showed less pain in 4 trials with 507 people with knee osteoarthritis, but all the trials had a high risk of bias. Glucosamine is the counterexample: a network meta-analysis of 10 large trials with 3,803 patients found a pain reduction of 0.4 centimeters on a 10-centimeter scale, below the predefined threshold of clinical relevance of 0.9 centimeters. Trials without industry funding showed smaller effects than funded ones.

Red light and devices: what the overview shows

Photobiomodulation with red and near-infrared light is heavily promoted for joint pain. An overview of 15 meta-analyses with 204 randomized trials and more than 9,000 participants found moderate certainty of evidence for only a few endpoints, one of them being function in knee osteoarthritis. Most of the other findings had low or very low certainty, some with signs of publication bias.

Because wavelength, dose and irradiance vary widely between studies, no recommendation for a particular home device can be derived from this. As an addition to training and weight control, red light can make sense; as a replacement, it cannot.

What the database says

Sorted by strength of evidence. The BK-Score rates the state of knowledge, not the substance.

Strength training 3× a week Evidence 9/10 · Well supportedStrength training strengthens the muscles that guide and relieve the joint, and is the best-supported single measure in this database.
6,000 to 10,000 steps a day Evidence 8/10 · Well supported, heavily overhypedRegular everyday movement keeps joints mobile and weight within limits. In large cohorts it is clearly associated with better health.
Glucosamine Evidence 8/10 · Well studied – effect not confirmedWell studied, but in the high-quality and independent trials without a clinically relevant effect on pain or joint space. The positive results depend heavily on one product and on study quality.
Blood flow restriction training (BFR) Evidence 7/10 · Supported, with caveatsTraining with a light occlusion cuff achieves a strong muscle stimulus with low weights and is therefore of interest to people with joint problems. Best done with guidance.
Turmeric (curcumin) Evidence 6/10 · Supported, with caveatsIn knee osteoarthritis, curcumin lowers pain and improves function in meta-analyses; in a large trial it was not inferior to ibuprofen. Highly bioavailable products stand out in rare cases for liver damage.
Collagen peptides Evidence 5/10 · Thin human evidenceIn knee osteoarthritis, a few trials show a reduction in pain, all with a high risk of bias and often funded by manufacturers. There is no evidence for rebuilding cartilage.
Red light / photobiomodulation (PBM) Evidence 5/10 · Thin human evidenceAccording to a large overview, photobiomodulation improves function in knee osteoarthritis with moderate certainty of evidence. Devices, wavelengths and doses, however, vary greatly.

Frequently asked questions

What helps quickly against stiff joints in the morning?

Gentle movement and mobilization after getting up help many people, and many find warmth pleasant. If the stiffness lasts a long time or affects several small joints, an inflammatory cause should be checked by a doctor.

Does glucosamine help with osteoarthritis?

In the large and independent trials, the effect on pain stayed below the threshold at which patients notice a difference. There was also no relevant effect on joint space. The positive results come mainly from manufacturer-funded trials.

How well does turmeric work against joint pain?

In knee osteoarthritis, curcumin lowers pain and improves function in several meta-analyses, in a large trial similarly to ibuprofen. Study quality is moderate. Because of rare liver damage with highly bioavailable products and suspected interactions, for example with blood thinners, you should discuss taking it with a doctor; it is not suitable if you have gallstones.

Does red light help with osteoarthritis?

A large overview of meta-analyses found an improvement in function with moderate certainty of evidence for photobiomodulation in knee osteoarthritis. Devices, wavelengths and doses differ greatly, so the results cannot be transferred to every home device. As an addition to training, it is an option.

Does losing weight do anything for the knees?

Yes, in a randomized trial, people with overweight and knee osteoarthritis had less pain and better function after diet plus training than with only one of the two measures. In the diet group, the compressive forces in the knee were lower than in the training-only group.

Can collagen rebuild cartilage?

There is no evidence for this in humans. A few trials show a slight reduction in pain in knee osteoarthritis, but they have a high risk of bias. Collagen is digested like any other protein.