How to Say "muscles" in Spanish
The Spanish word for “muscles” is “músculos” — A1 level. This is a very common word in everyday Spanish.
English → SpanishA1
nounA1
body parts

Examples
Necesitas hacer ejercicio para fortalecer tus músculos.
You need to exercise to strengthen your muscles.
Me duelen los músculos de las piernas después de correr.
My leg muscles hurt after running.
Always Masculine
Remember that 'músculos' is the plural of a masculine word ('el músculo'), so you must use masculine articles and adjectives with it (e.g., 'los músculos fuertes').
Using the wrong article
Mistake: “La músculos son grandes.”
Correction: Los músculos son grandes. (Since 'músculo' is masculine, the plural article must be 'los'.)
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