Supine to Sit Test

This is a brief video about the functional biomechanics of the supine to sit test as it relates to physical therapists. Please enjoy and share.

[@rkm1598]

Thank you so much very well explained.

[@BeautifulGirlC]

Great video! How do you distinguished the side of the problem? I.e. if you measure a short R Leg in supine, which becomes the longer leg when the pt. sits up, how do you know you weren't actually observing a long L leg, which became longer when the pt. sat up? We've learned to use the March/gillet test but I wondered if you use the same technique. Thanks!

[@rizzamaealmojuela6337]

Thank you ... for sharing of your knowledge ...

[@Rene-uz3eb]

I find it hard to believe that the sacroiliac joint can get stuck in any position that’s not the initial position, with the gazillion ligaments around. Unlike other joints the si very much has a base configuration position. My guess would be that the (minimal) rotation of that joint is purely for shock absorption, similar to how the foot arch absorbs impact shocks through its ligaments and movement of the bones other than the ankle joint. You can see that the hip joint is anterior to the si joint, so when running, the upward impact force will induce a rotational torque on the si axis. Like loading a spring, which then discharges again when that leg is lifted. Seems pretty obvious now. That would make perfect mechanical sense. Instead of sending the impact shock up the spine, you absorb it via elastic ligaments that can also return part of that energy again. Efficient, and safeguarding the spine. Same as spring+shock absorber in a car but torsional. Indeed, “Energy would be needed to separate the joint surfaces being pulled together by the surrounding ligaments. Thus, the sacroiliac joint may function as a shock- absorbing structure by virtue of energy absorbed in the ligamentous tissue.” The functional topography of the sacroiliac joint, 1980 This time for walking, with a computer simulation of forces: “Therefore, the role of the SIJ as a shock absorber can be confirmed based on the findings presented here” Finite element analysis of load transition on sacroiliac joint during bipedal walking, 2020 With that understanding of what the SI is for, I don’t think forcefully stretching these ligaments is a good idea. They would only ever be momentarily stretched because of impact, not because of engaging any muscles.

[@fizioterapevt]

Great video. Just at 6.05. Rectus femoris has origo on AIIS.

[@kylevincentmartos9855]

I have a question in terms of its treatment. For NPTE purposes, which would be better; for example, if there is an Anteriorly Rotated Innominate, do we Stretch the Tight Muscle (Rectus Femoris) or Strengthen the Weak muscle (Hamstrings)? Let us say, both choices are given, which would be better to answer?

[@mariahcabrales6910]

I have this question also! Ive heard you stretch before you strengthening but not completely sure.

[@tukni09]

Thank you Will. This lecture is really awesome :)

[@yahuahsdaughter]

Thanks Will you are awesome!

[@twib9137]

You are Really Awesome :) Wonderful explanation !! Thanks

[@thehumanmechanic1174]

hello Will !! Can u provide us with reference and authenticity of the Supine-to-Sit Test ? whats its specificity / sensitivity ? thanks and oblige

[@weiyutao1862]

Thank you

[@mohammedshahriyar5912]

Hi I have liked this video for anterior pelvic tilt - hip flexors will be tight - if so which muscles will most tight illiocus and rectus will most tight ...but not so much soas .. need your opinion . thank you

[@mzh-vw5ho]

I am a person with a tilted hip problem. I don't understand why it's so hard to get help for it. 2 orthos have suggested surgery on a slipped disk I also have; wrong diagnosis. I'm in the LA area with Best Choice insurance. If anyone has referral for someone who knows what they're doing, would love to know. Thanks from a lady in pain.

[@lakshmimahendran7392]

Well explaine and Thank you

[@mmmmmm-bu3tv]

thank you!

[@user-hi2nn1hm2e]

Nice, thank u