The Study
Effects of exercise intensity on postprandial improvement in glucose disposal and insulin sensitivity in prediabetic adults.
This study tried to see if exercise helps people with prediabetes control their blood sugar. Each person tried no exercise, moderate exercise, and hard exercise, then drank a sugary drink to test blood sugar. Both types of exercise helped the body use sugar better compared to no exercise, but neither was clearly better than the other.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
Researchers studied people with prediabetes. They had them either rest, do moderate exercise, or do intense exercise on separate days, then tested how their bodies handled sugar. Both exercise types improved insulin sensitivity, but intense exercise had a bigger effect on lowering blood sugar after a meal.
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 562 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1For a person with prediabetes, even a single workout can meaningfully improve how their body handles sugar, with higher-intensity exercise offering more pronounced benefits in the hours after a meal.
- 2Insulin sensitivity improved by 51% after moderate exercise and 85% after intense exercise, compared to doing nothing.
- 3Intense exercise lowered late-meal blood sugar by 13% and insulin by 26%, while moderate exercise showed smaller, non-significant trends.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
The Journal of clinical endocrinology and metabolism
Year
2014
Authors
C. Rynders, J. Weltman, Boyi Jiang, M. Breton, J. Patrie, E. Barrett, A. Weltman
Related Content
Claims (7)
How hard you work out affects how well your body uses insulin and keeps blood sugar steady. More intense exercise improves these systems.
For people with prediabetes, doing one workout of either medium or hard intensity, as long as they burn the same calories, both help the body use insulin better to control blood sugar, and neither is better than the other.
For someone with prediabetes, one intense workout can boost their insulin sensitivity by about 85% an hour later, meaning their body becomes much better at managing blood sugar.
For people with prediabetes, doing one intense workout can lower the big sugar spike that happens after a sugary drink by about 13% compared to not exercising. A moderate workout also seems to help a little, but that change is so small it might just be by chance.
For adults with prediabetes, doing one session of exercise—either moderate or intense—can lower the body's insulin release in the second phase after drinking a sugary drink. This reduction is about 22% for moderate exercise and 26% for intense exercise, compared to not exercising.
For people with prediabetes, doing one exercise session (either moderate or intense) can lower the blood sugar level measured two hours after drinking a sugary drink, compared to resting. Moderate exercise lowers it by about 16 mg/dL, and intense exercise lowers it by about 27 mg/dL.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.