Research Summary
Simplified Tai Chi Improved Mobility in Older Adults With Knee Arthritis and Muscle Loss, 96-Person Trial Finds
A short, simplified form of Tai Chi helped older adults with knee arthritis and muscle loss get up and move more quickly than a home exercise and education program, a randomized trial found. The study was published in Osteoarthritis and Cartilage Open in 2026.
What was studied
Many older people with knee osteoarthritis also have sarcopenia, a loss of muscle mass and strength that makes everyday movement harder. Researchers in Shanghai tested whether a 12-week simplified 8-form Tai Chi program could improve mobility in this group.
They randomized 96 adults aged 65 to 85 at two sites to either Tai Chi or an active comparison: health education plus progressive home exercise. The main outcome was the Timed Up and Go (TUG) test, which times how long it takes to stand from a chair, walk a short distance, turn, and sit back down. The people assessing results did not know which group participants were in.
Key findings
- At 12 weeks, the Tai Chi group improved their TUG time by about 2.5 seconds more than the comparison group.
- That average gain was slightly below the 2.8-second threshold the researchers had set for a meaningful individual improvement.
- However, 58% of the Tai Chi group (28 of 48) reached that 2.8-second improvement, compared with 12.5% (6 of 48) in the comparison group.
- At 26 weeks, a smaller advantage of about 1.5 seconds remained.
- Pain on the WOMAC arthritis questionnaire favored Tai Chi, but a separate 0-to-10 style pain scale showed no clear difference.
- No serious side effects were linked to either program.
What it means for people with knee pain
If you are older, have knee arthritis, and feel your muscles getting weaker, a gentle, simplified Tai Chi routine may be a safe way to improve how well you get around. It could be worth asking your doctor or physical therapist whether a class suits you.
Limitations
The trial was modest in size, done at two sites in China, and followed people for only six months. Pain results were mixed depending on how pain was measured, and the average mobility gain fell just short of the researchers' own threshold for a clearly meaningful change.
Frequently asked questions
- What is sarcopenic knee osteoarthritis?
- It means having knee osteoarthritis along with sarcopenia, an age-related loss of muscle mass and strength. The combination can make standing, walking and balance harder.
- How long did the Tai Chi program last?
- The program was 12 weeks of a simplified 8-form Tai Chi routine. Participants were checked again at 26 weeks, when a smaller mobility benefit was still present.
- Did Tai Chi reduce knee pain?
- Results were mixed. Pain on the WOMAC arthritis questionnaire favored Tai Chi, but another pain scale showed no clear difference between the groups.
Sudden severe pain, swelling, or can't bear weight? Seek medical care promptly. In an emergency call 911.