Analysis Version
v1
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assertion
Analysis v1
Strong Opposition

Lifting weights doesn't use much energy because it's mostly controlled lowering and long breaks between sets.

0
Pro
33
Against

Evidence from Studies

Supporting (0)

0

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No supporting evidence found

Contradicting (3)

33

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33

EPOC Comparison Between Isocaloric Bouts of Steady-State Aerobic, Intermittent Aerobic, and Resistance Training

Cross-Sectional Study
Human
2015 Jun

The study found that weight training burned just as many calories overall as cardio — and kept your body burning more calories for hours afterward. So, it’s not inefficient, as the claim says.

26

Caloric Expenditure of Aerobic, Resistance, or Combined High-Intensity Interval Training Using a Hydraulic Resistance System in Healthy Men

Cross-Sectional Study
Human
2015 Mar

The study didn’t test the kind of weightlifting described in the claim—it tested a fast, intense workout with special machines. Even regular weightlifting in the study burned fewer calories than the intense version, but that doesn’t prove regular weightlifting is inefficient due to slow movements or long breaks.

1

Skeletal Muscle Remodeling in Response to Eccentric vs. Concentric Loading: Morphological, Molecular, and Metabolic Adaptations

Narrative Review
2017

The study found that eccentric movements (like lowering a weight) use less energy, not more, so they don’t make workouts inefficient — which directly contradicts the claim.

Similar Assertions

Slowing down the lowering part of a lift (like slowly lowering a dumbbell) makes your muscles more damaged and triggers more repair and growth than quickly lowering it.

0
0
79%

What matters most for burning calories during weightlifting is whether you’re using big muscles like legs or small ones like chest—not how long you rest or how fast you lift.

46
0
75%

If a young, healthy man lifts weights for 8 weeks, his muscles will likely get bigger—by about 6%, give or take a little.

38
0
74%

For older adults between 59 and 76 years old, doing gentle strength training twice a week for 12 weeks makes them stronger but doesn't build much muscle size.

35
0
73%

You can get just as strong by pushing weights up as by lowering them slowly—even if lowering them doesn’t make your muscles sore or damaged.

58
0
73%

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