If it is a cheap enough lathe that it is light (lighter?) weight, try
moving it up and down on 4x4s, cinder blocks, whatever you have on
Elbow height is too low for me, and my neck hurts after too much time
of being bent over the spindle for smaller stuff. I found that about
4" or so above the height of my elbow seems to be about right as it
makes the spindle work easier when holding the tools at a more acute
I found that raising my lathe higher than elbow height also reduced
fatigue quite a bit.
Try your lathe out with something small on it at a lower speed so you
can raise up the lathe a bit at a time and try out the different
positions. As you have probably found out by now, one size does not
fit all in turning, and everyone does things differently in
woodturning. It may look the same, but it usually isn't.