The floor press has two main advantages. The first is that it is pretty user friendly for the shoulder. Thanks to the floor, your elbow cannot travel lower than your back. As long as you are maintaining the proper retraction, this will prevent the front of your shoulder from being
Scapular retraction refers to pulling the shoulder blades towards the spine (see more from me on this subject here). This is critical to proper posture, which in turn is hugely important for shoulder health. The bent over reverse fly is a great way to work this critical skill.
An important concept that is under-represented in the popular fitness scene is the movement of the shoulder blades. The movement of your shoulder blades together with your arm is hugely important for safe and effective exercise, so knowing a bit about the basics can do a lot for performance and