Research

Energy balance

Diet-induced weight loss significantly improves coronary artery disease (CAD) risk factors (glucose, insulin, lipids, blood pressure) in obese, middle-aged and older men, whereas aerobic exercise training without weight loss has substantially less beneficial effects on these parameters.

If you are obese and middle-aged or older, losing weight through diet is significantly more effective for improving your blood sugar, cholesterol, and blood pressure than exercising alone. While exercise is great for heart fitness, it does not fix metabolic issues as well as shedding fat mass. Focus on creating a caloric deficit to reduce body weight by at least 10%.

GoodSupportsHIGH confidence
These results suggest that weight loss is the preferred treatment to improve coronary artery disease risk factors in overweight, middle-aged and older men.
Leslie I. Katzel · JAMA · 1995

Why this rating

Randomized controlled trial with a large sample size (n=170) and rigorous controls, though limited to a specific demographic (healthy, obese, older men).

Source

Effects of Weight Loss vs Aerobic Exercise Training on Risk Factors for Coronary Disease in Healthy, Obese, Middle-aged and Older Men

Leslie I. Katzel · JAMA · 1995

DOI 10.1001/jama.1995.03530240025035

rct · n=170Cited 295×
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DOI resolved against Crossref · corpus check 2026-06-10

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