The Claim

Resistance exercise training performed three times per week during a very low-calorie diet prevents the loss of skeletal muscle mass in obese adults by stimulating muscle protein synthesis and counteracting the catabolic state induced by energy restriction, even when protein intake is adequate but not elevated.

Source: The impact and utility of very low-calorie diets: the role of exercise and protein in preserving skeletal muscle mass

What the research says

Roughly balanced

Support and challenge are close. The picture may shift as more studies come in.

Supports
2score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Cause and effect
1 study reviewed
In plain English

In obese adults on a very low-calorie diet, doing resistance exercise three times per week stops skeletal muscle mass from decreasing, even if protein intake is sufficient but not increased, because it increases muscle protein synthesis and reduces the breakdown caused by low energy intake.

See the scientific wording

Resistance exercise training performed 3 times per week during a very low-calorie diet (VLCD) prevents loss of skeletal muscle mass in obese adults, even when protein intake is adequate but not elevated, by stimulating muscle protein synthesis and counteracting the catabolic state induced by energy restriction.

Why this might work

When a person lifts weights, the force on the muscles turns on signals that tell the muscle cells to build more protein. Eating protein at the same time provides the raw materials and also turns on the same signals. Together, they make the muscle build protein strongly enough to stop it from breaking down, even when the body is starved for energy. Without this, the body breaks down muscle to make sugar for energy.

Verified mechanismbased on 1 study

What the research says

1 study

  1. Study: The impact and utility of very low-calorie diets: the role of exercise and protein in preserving skeletal muscle mass

    Lifting weights three times a week while eating very few calories helps keep your muscles from shrinking, even if you’re eating enough protein — without weights, you lose muscle even with enough protein.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

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