Strongest When Round Riddle

Riddle: I am strongest when you see me as round, but I am often viewed in other forms. I lift and drop the sea with my tremendous strength, and a man with a name like 'powerful bicep' was the first to tread on me. What am I?

Answer: I am the moon.

Source: https://www.riddles.com/730

I am strongest when you see me as round, but I am often viewed in other forms. I lift and drop the sea with my tremendous strength, and a man with a name like 'powerful bicep' was the first to tread on me.
What am I? — Strongest When Round Riddle by Anonymous v1.

Riddle: I am strongest when you see me as round, but I am often viewed in other forms. I lift and drop the sea with my tremendous strength, and a man with a name like 'powerful bicep' was the first to tread on me.
What am I? Answer: I am the moon. — by Anonymous v2.