Frame rate is the frequency or rate at which unique consecutive images are drawn to the screen. So delaying the updating of say the keyboard polling, movement and the physics, does not correlate to frame rate. The human eye cannot even really detect changes in high frame rates.
ive been confused on this for quite some time, so you limit the draw rate by frame per second not the update?
I don't understand this concept.
Check out this link on different FPS handling methods.