Research
Hormonal
Intramyocellular lipid (IMCL) accumulation, specifically the buildup of ceramides and diacylglycerol (DAG), impairs insulin signaling by activating inflammatory pathways and interfering with Akt activity.
Managing body fat and lipid metabolism through diet and exercise helps prevent the accumulation of harmful lipids like ceramides in muscles, protecting insulin sensitivity.
ModerateSupportsMEDIUM confidence
As lipids accumulate, the levels of the CER and DAG increase, which impairs the insulin signaling pathway and promotes insulin resistance.
Why this rating
Review of mechanistic studies.
Source
Mechanism of increased risk of insulin resistance in aging skeletal muscle
Jian Shou et al. · Diabetology & Metabolic Syndrome · 2020
DOI 10.1186/s13098-020-0523-x
narrative_reviewCited 265×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Exercise acts as a non-pharmacological intervention that counteracts age-related insulin resistance by enhancing mitochondrial oxidative capacity, improving autophagy, and reducing oxidative stress and inflammation.Good
- Skeletal muscle aging independently increases the risk of insulin resistance through a convergence of mitochondrial dysfunction, intramyocellular lipid accumulation, chronic inflammation, oxidative stress, and sarcopenia.Moderate
- Mitochondrial dysfunction in aging skeletal muscle, characterized by reduced oxidative capacity and increased ROS production, directly impairs insulin signaling and promotes insulin resistance.Moderate
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