Muscle-Building Myths That Need to Die in 2025
by Michael Davis in Education
Even as we wrap up 2025 with better muscle-building science than ever, outdated myths continue to circulate, especially across the internet. Thinking back, many once believed that fat could magically transform into muscle, or that you couldn’t build muscle beyond a certain age. If those myths somehow slipped past you, don’t worry, YouTube has plenty of old videos ready to bring you into the 21st century (look up common muscle building myths).
But, even with all the knowledge we have now, new myths are still emerging. And to be fair, scientists still don’t have a complete understanding of how muscle building works. One thing is for sure, we understand much more than before, but not everything.
That being said, here are a some muscle-building myths that need to die in 2025:
Myth 1: “Heavy weight is the ONLY way to build muscle.”
Research now shows light-to-moderate weights taken close to failure can stimulate similar muscle growth, especially for beginners and intermediates, than heavy weights. Heavy lifting is great, but it’s not mandatory for hypertrophy. The key is to train between 0-3 reps to failure if you want to build muscle.
A heavy weight would be 80-90% of your 1RM.
Myth 2: “You must train 6–7 days a week to make progress.”
Two to four high quality sessions per week is enough for most people. Be sure to focus on progressive overload, effort (0-3 reps from failure) and consistency. Remember that more training doesn’t necessarily mean more progress if you aren’t recovering.
Myth 3: “Toning vs. bulking are different types of exercises.”
The truth is that there is no such thing as a ‘toning exercise.’ You will have to modify your diet and training volume depending on whether you want to tone or bulk.
When people say:
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“I want to tone,” they usually mean build a small amount of muscle and reduce fat.
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“I want to bulk,” they mean build more muscle, possibly with some fat gain.
Toned is synonymous with lean.
Myth 4: “You can out-supplement bad training.”
Creatine and protein both work. But the rest of the supplements are mostly expensive hype. Supplements help maybe 5%. Training, nutrition, sleep, and stress control are the other 95%, and these are what matter the most
Stay consistent and be patient.
Myth 5: “If you’re not sore, you didn’t grow.”
The reality is that soreness does not equal progress. Muscle soreness (DOMS) typically occurs when an exercise is new, when volume increases, or when recovery is poor.