Research study · Frontiers in Medicine · 2026
Tai Chi exercise of short duration alters circulating oxylipins in postmenopausal women: a pilot study
Verified on PubMed Clinical Evidence Analysis
A 2026 study in Frontiers in Medicine tested endocannabinoid system in exercise. It produced some small chemical changes in the blood, but nothing that shows it helps health. This study shows that a few short Tai Chi sessions were linked to small shifts in some blood signaling chemicals in a group of 16 women, with.
In plain language
Study overview
Sixteen women past menopause, who had not practiced a mind-body exercise recently, took part in this small study. Each completed four gentle Tai Chi sessions over about ten days, and their blood was tested before and after.
Findings
It produced some small chemical changes in the blood, but nothing that shows it helps health. Several natural signaling chemicals shifted slightly, while others stayed the same, and the study had no comparison group.
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The deeper readScientific analysis
Tai Chi (TC) is a low-impact physical activity known to improve balance, strength, and cognitive health across the lifespan. We previously reported that 8 weeks of TC altered brain connectivity and circulating oxylipins (OxLs) and endocannabinoids/endocannabinoid-like compounds (eCBs) in postmenopausal (PM) women with knee osteoarthritis. This pilot study examined whether a short TC intervention similarly affects inflammatory OxL and eCB in PM women. Participants completed four TC sessions on non-consecutive days over 10 days. Non-fasting plasma collected at baseline and immediately after the fourth session was analyzed for OxL and eCB using targeted metabolomics. Partial least squares discriminant analysis (PLS-DA) assessed pre-to post-intervention differences, and paired t-tests with false discovery rate correction evaluated metabolite changes. Sixteen PM women (58.9 ± 5.2 years; BMI 33.6 ± 5.4 kg/m2) completed the study. Several OxLs demonstrated PLS-DA variable importance in projection scores >1.0. Post-intervention, 1-AG and 12-hydroxyeicosatetraenoic acid (12-HETE) were generally lower, whereas 18-HEPE was higher. TC produced modest effects on eCBs but more pronounced changes in OxLs. Reduced monoacylglycerols may indicate TC-induced mobilization of fatty acids through enzymes involved in 1-AG metabolism.
The paper
Citation
Shen CL, Newman JW, Snodgrass IF, Caruso DJ, Chyu MC, Neugebauer V, et al. Tai Chi exercise of short duration alters circulating oxylipins in postmenopausal women: a pilot study. Frontiers in Medicine (2026). PubMed 42740961 · DOI
Limitations the authors noted
Small single-arm pilot (n=16) with no control group, no randomization, and no blinding. Non-fasted blood samples and room-temperature handling, which can cause 2-AG to isomerize to 1-AG and affect monoacylglycerol measurements. Only about 30% of 130 panel analytes were detected and met quality control; achiral chromatography may mix stereoisomers. Many PLS-DA-highlighted metabolites were not significant after false discovery rate correction; no power calculation. Only postmenopausal women were studied; no tissue-level, enzyme, or free fatty acid measurements; the authors note the findings cannot be attributed to a specific organ. Authors are editorial board members of the journal (disclosed).
In practice
Why this matters
This study shows that a few short Tai Chi sessions were linked to small shifts in some blood signaling chemicals in a group of 16 women, with no comparison group. It does not establish that these shifts have any health effect, and it says nothing about longer programs, other ages, or men. Readers should treat it as a starting point for controlled trials, not as evidence that Tai Chi changes the body's endocannabinoid system in a meaningful way.
Frequently asked questions
Clinical Questions & Answers
What were the primary clinical findings regarding Endocannabinoid system and Exercise recovery?
It produced some small chemical changes in the blood, but nothing that shows it helps health. Several natural signaling chemicals shifted slightly, while others stayed the same, and the study had no comparison group.
What study limitations or clinical safeguards should patients keep in mind?
Small single-arm pilot (n=16) with no control group, no randomization, and no blinding. Non-fasted blood samples and room-temperature handling, which can cause 2-AG to isomerize to 1-AG and affect monoacylglycerol measurements. Only about 30% of 130 panel analytes were detected and met qua...
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Condition: Exercise Condition: Exercise recovery Topic: Endocannabinoid system
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Reviewed by Dr. Caplan on October 30, 2026.
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