Strong Support

If overweight women in their late 60s cut their daily calories by 500 and lift weights three times a week for 13 weeks, they keep more of their muscle compared to those who don’t exercise—even though both groups lose the same amount of overall weight and fat.

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Pro
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Against

Evidence from Studies

Supporting (1)

54

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The study found that older women who did strength training three times a week while dieting lost much less muscle than those who didn’t train — even though both groups lost the same amount of total weight and fat. So yes, lifting weights helps keep muscle when losing weight.

Contradicting (0)

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No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.