Here's how you can think about "muscular verbs":
* They are often active and dynamic: Instead of saying "The car went fast," you could say "The car sped down the road."
* They create a vivid image in the reader's mind: Instead of saying "The woman walked across the room," you could say "The woman strolled across the room."
* They can be used to create a sense of energy or excitement: Instead of saying "The dog barked," you could say "The dog howled."
In essence, "muscular verbs" are verbs that pack a punch and make your writing more engaging and impactful.