The Study
Muscle microvascular blood flow responses in insulin resistance and ageing
This study is like a teacher summarizing what scientists have learned about how tiny blood vessels in muscles affect sugar control. It doesn’t do a new experiment but puts together clues from many past studies to explain a possible reason why people become resistant to insulin.
Analysis score
Maximum 5 for a narrative review.
Where the score came from
Insulin helps sugar get into muscles by opening up tiny blood vessels. If those vessels don’t respond well, sugar doesn’t get in properly, which can lead to diabetes.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 52 / 100
Quality score
Based on clinical experience or non-systematic literature reviews. The lowest level of evidence as they are most susceptible to bias and personal perspective.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes, this is important because poor blood flow in muscles can start insulin resistance before cells themselves become resistant.
- 2Insulin opens small blood vessels in muscles to let more sugar in.
- 3When this doesn’t work—because of fat, age, or poor blood flow—muscles can’t take up sugar well.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
The Journal of Physiology
Year
2016
Authors
M. Keske, Dino Premilovac, E. A. Bradley, R. Dwyer, S. Richards, S. Rattigan
Related Content
Claims (5)
Insulin helps open up blood vessels in your muscles, letting more blood through so nutrients like creatine can get to the muscle cells more easily.
When the tiny blood vessels in muscles don't respond well to insulin, it's linked to being overweight, having insulin resistance, and getting older — and this might actually happen before the muscle cells themselves become resistant to insulin.
In rats, eating a diet that's a bit high in fat or salt messes up blood vessel function in muscles before the muscle cells themselves become resistant to insulin — and that blood vessel problem alone can slow down how much sugar the muscles take in.
Insulin helps more blood flow to muscles in rats and people by using a substance called nitric oxide, which helps sugar get into muscle cells better.
When mice have a broken insulin signal in their blood vessel lining, their muscles don’t get enough sugar—even if the muscle cells themselves work fine—because the blood flow to the muscles drops.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.