Amazing gym Adriana! It's not too feminine in my opinion.
But do you want some advice? Treadmills are supposed to be pointing at windows. That way people can look outside when running.
For sims this doesn't matter, but it gives that extra bit of reality.
Also, a special place for power liters is a good idea. If you do so, place a rubber floor underneath it. Every good gym has it, for in case someone drops a dumbell.
Again, the floor won't add anything extra for sims, but for realism sake it will smooth the eye.
One last thing I am missing is swimming and some theme sport activities. Don't forget about the hidden skills for baseball and other balls.
A dancing area could be added so sims can train that too. And last not least, a bar (protein shakes) and a changing room (decorative) and showers.
Don't forget a sauna, if you have that! And a masage table.
Oh, and the sauna you can fake with the smog machine from the party part of the Buy Object category.
And... oh yes: a toilet or too within hand reach from the training area and a hot tub could do the trick as well.
Am I forgetting something... oh yes, giant mirrors in the Power Lift area.
Some guys need to be able to look at themselves while training.
(Don't look at me!)
