How much can Thena lift?

I'm curious, just how much weight can Thena actually lift? Is she capable of hoisting massive boulders or is her strength more subtle, perhaps able to lift objects that are heavy but not overwhelmingly so? It's fascinating to ponder the limits of her physical prowess and what that might mean in the context of her abilities and the world she inhabits. I'd love to hear more about the specifics of her strength and how it factors into her adventures.