What are isotonic versus isokinetic exercises and what are the differences?

Her are they: Now, there are several forms of lifting... Isotonic, auxotonic, isokinetic, and isometric. Here is a brief defination of all. Isotonic - where there is constant tension during the lift isokinetic - constant velocity (speed) in the lift isometric - there is no change in muscle length during the lift, static auxotonic - changing tensions caused by altered velocities and joint angles.