quantitative
Analysis v1
New lifters can expect to gain about 1–2 kg of muscle in the first few months, but after that, gains slow down dramatically—most people only add 2–4 kg per year even with years of training.
Evidence from Studies
No evidence studies found yet.
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.