rdl: the bar essentially drags down the leg to the point where you feel stretch in the hams. slight bend in the knee. you only go down as far as you can to keep the lower back arched.
sldl: legs may be fairly straight or slightly bent, but the ROM tends to be a little deeper. some even round the back a bit.
key difference is the amount of leg bend (more in a RDL), the back is arched. with RDL's ive seen the bar travel only to just above the knee and back up.
key difference is the amount of leg bend (more in a RDL), the back is arched. with RDL's ive seen the bar travel only to just above the knee and back up.