Can stretching even soften your blood vessels!? The surprising potential shown by the latest meta-analysis✨
🎥 Click here if you want to watch a quick 1-minute video👇
https://youtube.com/shorts/1UzzkPAAcOo
"Stretching is for making your body flexible."
I imagine many people think that way😊
However, the latest meta-analysis published online on July 26, 2026, showed the possibility that stretching can also soften the blood vessels themselves.
Interestingly, while this study was conducted by an American research group, 6 out of the 12 studies analyzed were conducted in Japan, which suggests that Japanese research is leading the way in this field.
In this article, I will introduce this latest research as clearly as possible😊
🫀 What does it mean for "blood vessels to be stiff"?
Our blood vessels are flexible and expand and contract like rubber hoses.
However, when blood vessels become stiff due to aging or lifestyle habits,
✅ Blood pressure tends to rise
✅ The burden on the heart increases
✅ Arteriosclerosis is more likely to progress (arteriosclerosis is, by definition, the stiffening of blood vessels)
It is known that these factors increase the risk of cardiovascular disease.
A representative indicator for evaluating that stiffness is
PWV (Pulse Wave Velocity)
.
This is a test that measures the speed at which blood pulses travel through blood vessels,
the faster it is, the stiffer the blood vessels
the slower it is, the softer the blood vessels
is how it is interpreted.
📚 What is this study about?
This paper is a systematic review and meta-analysis.
It aggregates and analyzes past stretching studies,
"Do blood vessels really become softer?"
We verified this.
There were 12 studies analyzed.
Acute effects (stretching just once): 6 studies
Long-term intervention (4–12 weeks): 6 studies
Data for a total of 269 people were analyzed.
✨ Is there an effect even from a single stretch?
With just one stretch,
there was a tendency for PWV to improve, but
it was not statistically significant.
In other words,
"There is a possibility that they become slightly softer, but at this point, there is not enough evidence to say so definitively."
That is the result.
💪 The results change significantly if you keep at it!
On the other hand,
studies where stretching was continued for 4–12 weeksshowed very different results.
Surprisingly,
PWV decreased significantly.
In other words,
the stiffness of the blood vessels improved
it was shown that.
Moreover, the effect size was relatively large, and
the authors
mention the possibility that it is at a level close to the improvement seen with aerobic exercise
as well.
Of course, it cannot be said that it replaces aerobic exercise, but
it is a study that provides a new perspective that
“stretching can also be expected to have benefits for blood vessels.”😊
🌍 Does stretching only the legs change blood vessels throughout the body?
This is the point that was particularly interesting in this paper.
For example,
even in studies where only the legs were stretched,
the PWV where improvement was confirmed includes
✅ Carotid-femoral PWV (central aorta)
✅ Brachial-ankle PWV
✅ Heart-ankle PWV
and so on,
improvements were also seen in vascular segments different from the stretched areaas well.
In other words,
the possibility that even though you only stretched your legs, a positive effect extends to the blood vessels of the entire body
was shown.
In the discussion of the paper, it is noted that this result cannot be explained by local changes alone,
The possibility that systemic physiological mechanisms are at work
has been suggested.
🔬 Why do blood vessels become softer?
While this is still at the hypothesis stage, the paper introduces a two-stage mechanism😊
① What happens during a single stretch
When muscles are slowly stretched,
the blood vessels are subjected to a stimulus called shear stress.
Then,
from the vascular endothelium,
nitric oxide (NO)
becomes more easily secreted.
Since NO has the function of dilating blood vessels,
it is thought that endothelial function improves,
temporarily softening the blood vessels
.
② Do the blood vessels themselves change if you continue?
Furthermore,
if this stimulus is repeated for several weeks,
the components that make up the blood vessel wall,
elastin
Collagen
and other extracellular matrices are remodeled, and
the structure of the blood vessels themselves changes,
suggesting that arterial stiffness (vessel hardness) may be chronically improved.
In other words,
it is not that "blood vessels only soften temporarily"
but rather,
a very interesting hypothesis that there is a possibility that the structure of the blood vessels themselves changes through continuation
exists.
However, as the authors clearly state,
this is currently "preliminary evidence showing biological plausibility," and not a study that directly proves this mechanism itself.
This is a very important point, isn't it?😊
📅 What kind of stretching seems good?
In this analysis,
conditions that were particularly effective included
✨ Targeting major muscles
✨ Repeating one stretch 3 or more times
were mentioned.
Furthermore,
30 minutes or more
5-7 days a week
Performed under the guidance of an instructor
tended to show higher effectiveness, but
this was not confirmed to be statistically significant.
As research progresses further, more optimal stretching methods may be revealed.
📝 Summary
Until now, stretching has
strongly had the image of being
an exercise to increase flexibility.
However, this meta-analysis
🫀 suggested the possibility of having a positive effect on blood vessels as well
.
In particular,
the indication that consistent practice may improve vascular flexibility
is a very interesting discovery.
Of course,
the number of studies is still small at 12, and the mechanisms are still at the hypothesis stage.
Even so,
it is easy for anyone to start,
requires no special equipment,
and stretching, which can be done regardless of age,
In the future, it may also prove useful for maintaining cardiovascular health😊
It's not just for "making your body flexible,"
but it is well worth incorporating stretching
as a "habit to care for your blood vessels" too✨
📖 References📚
Logan JG, Chauntry AJ, Zhao H, Park S, Stoner L. Musculoskeletal Stretching and Arterial Stiffness: Systematic Review and Meta-analysis of Acute and Longitudinal Interventions. Sports Medicine. Published online July 26, 2026.
