Just because you move your muscles through a bigger range during strength training doesn't always mean they'll grow more — the science isn't clear on this, and it might depend on how each muscle works.

What we've found so far is limited, but the evidence we've reviewed does not support the idea that greater range of motion in resistance training always leads to more muscle growth [1]. Our analysis of the available claims shows that simply moving a muscle through a larger range may not guarantee more growth — the relationship isn’t clear-cut. We looked at one assertion suggesting that while range of motion matters, it doesn’t always mean better results for muscle growth [1]. This could depend on how each muscle functions during movement, and other factors like muscle activation, joint mechanics, or exercise type might play a role. However, based on what we’ve reviewed so far, we can’t determine how strong this effect is or under what conditions it might apply. Our current analysis shows that the evidence is very limited — only one claim was available for review, and no studies or assertions contradicted it. Because of this, we can’t say whether larger ranges of motion are consistently better, worse, or neutral for muscle growth across different exercises or individuals. We don’t yet have enough data to draw broader conclusions. The idea that “more movement always equals more growth” may seem logical, but the evidence we’ve reviewed suggests it’s not that simple. Practical takeaway: Moving your muscles through a full range during exercises might be helpful, but don’t assume bigger movements always build more muscle. Focus on what feels strong and controlled for your body — the science we have so far doesn’t confirm one best way.