D1 and D2 aren't lever arms -- they're moment arms. A lever arm is the linear distance between the point of force application and the axis of rotation. A moment arm is the perpendicular distance between the LINE of force and the axis. Those are almost always two different values (maybe a little, or maybe a lot). Those terms only have the same magnitude when the force in question is applied perpendicular to the lever.
+Shots Of Insight yeah mostly but this video was not the bottom of the problem , since im an IT guy and i sit all the time, my ass muscles atrophied, and thatll make your hip tight. so do clamshell exercises, and one leg squats enough so itll pump your butt back up to strength so it wont pinch your piriformis that pulls your leg to the external position and fucks up ur walk
Thanks guys, first time understood in depth mechanism of working of gluteus medius
D1 and D2 aren't lever arms -- they're moment arms. A lever arm is the linear distance between the point of force application and the axis of rotation. A moment arm is the perpendicular distance between the LINE of force and the axis. Those are almost always two different values (maybe a little, or maybe a lot).
Those terms only have the same magnitude when the force in question is applied perpendicular to the lever.
He said d1 is the perpendicular distance from the axis of rotation to the closest point of the lever arm. it's correct.
Very well explained - makes so much sense! Thanks for the fantastic resource.
Compensated & due compensated: would like repeated while pointing out which is the side with the g. Medius weakness. Thank you.
Excellent lecture! Thank you :-)
this is a great lecture! thank you!
hey guys i got a left foot that is externally rotated, does this mean i have IT band syndrome, piriformis syndrome or both?
+cmdeane did u fix it?
+Shots Of Insight yeah mostly but this video was not the bottom of the problem , since im an IT guy and i sit all the time, my ass muscles atrophied, and thatll make your hip tight. so do clamshell exercises, and one leg squats enough so itll pump your butt back up to strength so it wont pinch your piriformis that pulls your leg to the external position and fucks up ur walk
cmdeane genius man, thank you. Any vids worth watching? Of the clamshell exercises?
Great video. Hip biomechanics explained really well. I feel somewhat sorry for you that your students are so dim.
What's the "t" gait word? Sounds vaguely like "tranDOMberg"
trendeleburg
Thanks!
Nice lecture
thank you so much
On the second video it says HAM=Hip Abductor Moment (glute medius).