The Claim
Reduced expression of insulin receptor (INSR) and insulin receptor substrates 1 and 2 (IRS1, IRS2) in subcutaneous adipose tissue is associated with lower levels of physical activity in humans, and this association is proposed as a molecular mechanism underlying reduced insulin sensitivity in sedentary individuals.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In sedentary people, lower activity levels are linked to reduced activity of insulin receptor proteins in fat tissue, which corresponds with decreased insulin sensitivity.
See the scientific wording
Reduced expression of insulin receptor (INSR) and insulin receptor substrates 1 and 2 (IRS1, IRS2) in subcutaneous fat tissue is associated with lower physical activity levels, suggesting a molecular basis for the observed reduction in insulin sensitivity in sedentary individuals.
When a person is inactive, fat cells make less of the proteins that insulin needs to signal that it's time to stop breaking down fat. With fewer of these proteins, insulin cannot effectively turn off fat breakdown, so fatty acids keep leaking into the blood even when insulin is present. This excess of fatty acids in the bloodstream interferes with how the body uses insulin to manage blood sugar.
What the research says
1 studyStudy: RELATIONSHIP BETWEEN A SEDENTARY LIFESTYLE AND ADIPOSE INSULIN RESISTANCE.
In people who don’t move much, their fat cells make less of the proteins that help insulin do its job, so insulin can’t stop fat breakdown as well — which is why they need more insulin to get the same effect.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.