When you do weightlifting with changing resistance (like bands or machines that get harder or easier), your muscles briefly turn on a growth signal called MyoG more than with regular weights—but this doesn’t mean you’ll end up bigger in the long run.
Context Details
Domain
exercise_science
Population
human
Subject
Acute myogenin (MyoG) expression
Action
increases significantly more after
Target
variable resistance training compared to standard resistance training, indicating a transient molecular difference that does not translate to greater long-term muscle growth
Intervention Details
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.
Evidence from Studies
Supporting (1)
Resistance training variable manipulations are less relevant than intrinsic biology in affecting muscle fiber hypertrophy
The study found that mixing up your workout routine (like changing weights and rest times) makes a muscle gene (MyoG) spike more right after exercise than doing the same routine every time — but in the end, both types of training built the same amount of muscle. So the bigger spike doesn’t mean bigger muscles.