Ecommerce Urls For Categories?

Hello! So i've run into a problem.

So I'm trying to target a few long tail keywords as my categories.

Let's say my site is about: Weights

I want to target: barbells for women, barbells for men, barbells for aliens, barbells for dogs etc ... then same for bench presses .. bench presses for women , bench presses for dogs etc ..

Should my categories be:

websitename.com/barbells-for-women
websitename.com/barbells-for-men
websitename.com/barbells-for-aliens
websitename.com/bench-presses-for-women
etc .....

Just wondering since this involves me making a ton of categories would I eventually run into a problem?

The other idea I had was making main categories such as barbells and benches but the problem is with my sub categories ... since I mentioned women already in the barbells categories like this
websitename.com/barbells/women

Wouldn't that be a problem when i mention women again in the bench presses categories
websitename.com/bench-presses/women

Any tips?