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Analysis v1
Strong Support

Whether you lift weights slowly or quickly, you’re likely to gain about the same amount of muscle — the speed doesn’t seem to make a big difference.

39
Pro
0
Against

Evidence from Studies

Supporting (1)

39

Community contributions welcome

39

How Slow Should You Go? A Systematic Review With Meta-Analysis of the Effect of Resistance Training Repetition Tempo on Muscle Hypertrophy

Systematic Review With Meta-Analysis
Human

The study found that lifting weights slowly or quickly led to almost the same amount of muscle growth, so whether you go slow or fast doesn’t really matter for building muscle.

Contradicting (0)

0

Community contributions welcome

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.

Source Study

How Slow Should You Go? A Systematic Review With Meta-Analysis of the Effect of Resistance Training Repetition Tempo on Muscle Hypertrophy

Score: 39
DOI: 10.1519/jsc.0000000000005302

Similar Assertions

Whether you lift weights slowly or quickly, you’ll likely gain about the same amount of muscle—so don’t stress over the speed, just keep lifting.

39
0
99%

Whether you lift weights slowly or quickly, as long as everything else stays the same, you’ll likely build about the same amount of muscle—so how fast you move the weight might not matter much.

39
0
95%

Lifting weights slowly or quickly between half a second and 8 seconds per rep doesn’t seem to make a difference in how much your muscles grow — as long as you’re doing resistance training.

50
0
91%

Lifting weights fast or slow doesn’t make much difference in how much your muscles grow — the extra gain from going slow is practically nothing.

50
0
86%

Whether you lift weights slowly or quickly, you’re probably not going to build more muscle with one over the other — the difference is so tiny it doesn’t really matter in real life.

39
0
86%