Resistance Exercise: Diabetes & Obesity Prevention
- What: A study comparing the effects of endurance (running) and resistance (weightlifting) exercise on preventing diabetes and obesity.
- Where: Fralin Biomedical Research Institute at Virginia Tech (VTC).
- When: Findings published October 30, 2023, in the Journal of Sport and Health Science.
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Weightlifting Outperforms Running in Preventing Diabetes and Obesity, Study Finds
The Study: A Head-to-Head Comparison
Running burns calories,but when it comes to preventing diabetes and obesity,weightlifting may offer a significant advantage,according to preclinical research from the Fralin Biomedical Research Institute at VTC. The study, published in the Journal of Sport and health Science, directly compared the effects of endurance and resistance exercise in mice fed a high-fat diet – a common model for obesity, hyperglycemia, and type 2 diabetes.
Researchers led by Zhen Yan of Virginia Tech discovered that while both running and weightlifting aided in clearing excess sugar from the bloodstream, resistance training was superior in reducing both subcutaneous and visceral fat, enhancing glucose tolerance, and decreasing insulin resistance. These factors are crucial for both preventing and managing diabetes.
We all want to live a long, healthy life. We all know the benefits of regular exercise. There is plenty of evidence in humans that both endurance exercise, such as running, and resistance exercise, such as weightlifting, are effective in promoting insulin sensitivity.
– Zhen Yan, professor and director of the Fralin Biomedical Research Institute at VTC’s Center for Exercise Medicine Research
Despite the known benefits of both exercise types, a rigorous, side-by-side comparison was previously lacking. This study aimed to determine if one type of exercise held a distinct advantage over the other.
How the research Was Conducted: A Novel Mouse Model
To facilitate the first direct, controlled comparison, the research team developed a unique mouse model for weightlifting. This involved specially designed cages where mice accessed food through a hinged, weighted lid. Mice wore a small shoulder collar and had to lift the lid to eat,performing a squat-like movement that mimicked human resistance exercise. The weight was progressively increased over several days, simulating a progressive strength training program.
The endurance group had unrestricted access to a running wheel, a standard model for aerobic exercise. Control groups consisted of sedentary mice consuming either a normal or high-fat diet.
Key Findings: Resistance Training Takes the Lead
The study revealed significant differences between the two exercise groups. While both running and weightlifting improved metabolic function, resistance training demonstrated a more pronounced effect on key indicators of metabolic health:
| Metric | Running Group | Weightlifting Group |
|---|---|---|
| Subcutaneous Fat Reduction | Moderate | Significant |
| Visceral Fat Reduction | Moderate | Significant |
| Glucose Tolerance | Improved | Substantially Improved |
| Insulin Resistance | reduced | Significantly Reduced |
These results suggest that resistance training may be a more potent strategy