Whether the seated position of the lumbar
extension machine makes these findings impossible to compare with those taken during the horizontal back extension in the prone position, however, is unclear.
Not exact matches
Perhaps even more significant than this replacement of human labor is the
extension, classification, and perfection of the human powers of thought
made possible by automatic
machines.
The mind appears to be adapted for reaching out and
making the world, including our
machines, an
extension of itself.
In fact, the mind appears to be adapted for reaching out from our heads and
making the world, including our
machines, an
extension of itself.
Sit on the leg
extension machine and
make sure your upper and lower leg forms a 90 degree angle.
An easy way to
make your workouts harder if you use
machines i.e. leg press, leg curl, leg
extension, shoulder press, chest press etc. is to move to free weights.
Various manufacturers
make different versions of the back
extension machine.