How exercise makes the liver make more sugar
Enhanced glucose production in norepinephrine and palmitate stimulated hepatocytes following endurance training
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
When rats train a lot, their liver cells get better at making sugar from building blocks like lactate, especially when given signals like norepinephrine or fat.
No biological mechanisms were identified in this study. This may be an epidemiological, observational, or survey-based study that reports associations rather than proposing causal biological pathways.
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A snapshot of a population at a single point in time. Can identify correlations and prevalence, but cannot determine the direction of cause and effect.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
When rats train a lot, their liver cells get better at making sugar from building blocks like lactate, especially when given signals like norepinephrine or fat.
No biological mechanisms were identified in this study. This may be an epidemiological, observational, or survey-based study that reports associations rather than proposing causal biological pathways.
Systematic Reviews & Meta-Analyses
Max 100Randomized Controlled Trials
Max 90Cohort Studies
Max 72Case-Control Studies
Max 58Cross-Sectional Studies
Max 44Case Reports & Case Series
Max 30Expert Opinion & Narrative Reviews
Max 515 / 44
Evidence Score
A snapshot of a population at a single point in time. Can identify correlations and prevalence, but cannot determine the direction of cause and effect.
Publication
Authors
Sumida KD, Lordan VM, Donovan CM
Related Content
Claims (6)
Female rats that did treadmill training for 10 weeks made more glucose in their liver cells, even when resting and without hormones, compared to rats that didn’t train.
Liver cells from female rats that were trained for endurance produce way more sugar when triggered by a stress hormone, compared to liver cells from untrained rats — showing their bodies are better tuned to respond under stress.
In female rats that were trained for endurance, their liver cells used more lactate to make glucose when stimulated, and this extra fuel use completely explains why they made more glucose—meaning the key change was how much lactate got into the cells, not how fast the cells processed it.
After 10 weeks of endurance training, female rat liver cells become more sensitive to a stress hormone called norepinephrine, meaning they start producing more sugar with much smaller amounts of the hormone compared to untrained rats.
In rat liver cells, a type of fat called palmitate boosts sugar production just as much as a stress hormone does, and adding both together doesn’t do more — suggesting they work through the same switch in the cell.