When lying down i would think this is okay in spite of the posterior rotation. I may be mistaken, but i think that Shirley Sahrmann recommends a posterior tilt when stretching the the semi's and biceps femoris, when they are very tight.
@sandhedomsundhed - The SI joint is a fairly immobile joint. Unless the hips are lifting off the ground, there is little to no torque applied to the lumbar spine. However, even if the hips lift (not a good way to stretch the hamstrings), the spine is no more torsioned than during a long stride.
@sandhedomsundhed : well i did not mention the SI joint, not very much mobilty though, no, but some, now that you mention it. So is his lumbar spine in flexion and the pelvis in a posterior tilt all the time? Also, we can not except and "even" torque "down the spine"; since rotation of the pelvis affects the lumbopelvic spine, and rotaion in the lumbar spine does not mean all vertebrae rotates to the same side, there might be right anteroposterior rotation at L3-4 and left rotation
@sandhedomsundhed rotation at L2-3, if im not mistaken, maybe this only is true when in an upright position, and for instance like during gait. Im reading "the pelvic girdle" at the moment, so im trying to see if i have understood these things correctly, and i can highly recommend this book! It is by Diane Lee. Well if the lumbar spine is in extension i.e. anterior pelvic tilt, the hips coming of the ground would not nessisarily eequal a posterior pelciv tilt? Am i right? But i would
The hamstrings are attached to the ilium, so this exercise moves/ posteriorly rotates the ilium on the sacrum and mal-aligns the sacroiliac joint. A posteriorly rotated ilium deviates the the spine to the opposite side and rotates the spine about it's longitudinal axis from the sacrum upward the entire length of the spine, including the Atlas. It is not a recommended exercise.
@Pelfixer1 - Because the hamstrings attach at the ischial tuberosity, the orientation of the pelvis layign down will have little effect on the stretch. You will, however, see that tight, shortened hamstrings can lead to a posterior pelvic tilt in a standing position.
@psoasbodywork Straight leg raising/stretching with your subject in the backlying position/knee extended as shown may stretch the hamstring to some extent, but what is really happening is the ilium is posteriorly rotating on the sacrum (ilium moving on sacrum). The joint also moves ilium on sacrum when one is in the standing position and you forward flex your trunk, like when you bend forward to touch your toes.
What is the difference between MET and PNF?
tantsura 1 year ago
When lying down i would think this is okay in spite of the posterior rotation. I may be mistaken, but i think that Shirley Sahrmann recommends a posterior tilt when stretching the the semi's and biceps femoris, when they are very tight.
sandhedomsundhed 1 year ago
@sandhedomsundhed - The SI joint is a fairly immobile joint. Unless the hips are lifting off the ground, there is little to no torque applied to the lumbar spine. However, even if the hips lift (not a good way to stretch the hamstrings), the spine is no more torsioned than during a long stride.
psoasbodywork 1 year ago
@psoasbodywork recommend that form when stretching though.
sandhedomsundhed 1 year ago
@sandhedomsundhed : well i did not mention the SI joint, not very much mobilty though, no, but some, now that you mention it. So is his lumbar spine in flexion and the pelvis in a posterior tilt all the time? Also, we can not except and "even" torque "down the spine"; since rotation of the pelvis affects the lumbopelvic spine, and rotaion in the lumbar spine does not mean all vertebrae rotates to the same side, there might be right anteroposterior rotation at L3-4 and left rotation
sandhedomsundhed 1 year ago
@sandhedomsundhed rotation at L2-3, if im not mistaken, maybe this only is true when in an upright position, and for instance like during gait. Im reading "the pelvic girdle" at the moment, so im trying to see if i have understood these things correctly, and i can highly recommend this book! It is by Diane Lee. Well if the lumbar spine is in extension i.e. anterior pelvic tilt, the hips coming of the ground would not nessisarily eequal a posterior pelciv tilt? Am i right? But i would
sandhedomsundhed 1 year ago
The hamstrings are attached to the ilium, so this exercise moves/ posteriorly rotates the ilium on the sacrum and mal-aligns the sacroiliac joint. A posteriorly rotated ilium deviates the the spine to the opposite side and rotates the spine about it's longitudinal axis from the sacrum upward the entire length of the spine, including the Atlas. It is not a recommended exercise.
Pelfixer1 1 year ago
@Pelfixer1 - Because the hamstrings attach at the ischial tuberosity, the orientation of the pelvis layign down will have little effect on the stretch. You will, however, see that tight, shortened hamstrings can lead to a posterior pelvic tilt in a standing position.
psoasbodywork 1 year ago
@psoasbodywork Straight leg raising/stretching with your subject in the backlying position/knee extended as shown may stretch the hamstring to some extent, but what is really happening is the ilium is posteriorly rotating on the sacrum (ilium moving on sacrum). The joint also moves ilium on sacrum when one is in the standing position and you forward flex your trunk, like when you bend forward to touch your toes.
Pelfixer1 1 year ago