How firm are these tiles? How do they compare to the complete rubber tiles cushion-wise? I'm concerned they will have too much "give" for weightlifting and be a little too soft. I want something that's nice and firm with just a small amount of cushion for joint comfort.

The foam used to construct our 3/4" Impact Rubber Tiles is high-density foam. This foam is denser than our standard foam tiles providing support and cushion at the same time. These tiles are some of the best gym flooring options for anyone looking for a durable, high-impact floor for their home or commercial gym.