Sexy legs
The theory of doing bench presses with lifted legs is as under :- taking your feet off the ground. You are using your chest muscles more to do the lift. Also engaging your mid section much more. I have always found feet on ground to be kind of cheating, but muscle men need feet on ground so they can be manly lifting mad weight. I never put my feet on the ground when I do this movement. You will find by taking your feet off the ground you will be able to lift less weight. You also have to work a bit harder stabilizing yourself. If you want to make it even more fun. Hang some kettle bells on the end of each side of the bar with them hanging from bands ! Basically feet off the ground equates into you using more of your muscles. Put your legs straight out a bit towards the sky you have no choice, but to engage your mid section. Multi tasking so to speak.....Give it a try.