The physical was one step in the process for me. During the paperwork and all the information I needed to gather my recruiter took me for my physical at an Army base and it was head to toe. Range of motion, duck walk, joint check, labs of course and yes this process can eliminate you from the process but there are waivers to obtain. For me: cholesterol, vision, and my knee were causes for waivers. This is different for everyone and is necessary so get it done when you can.