Thank you for watching Alasdair's prsentation. You can find the full lecture series here: th-cam.com/play/PLI7VLEjUJidBpOCEyXIfHVHfLa5AhSqUm.html Please note that I do reply to questions/comments, but all previous responses have been lost in transitioning the channel over to my new email address.
Abduction moment and valgus moment are often used interchangeable. Also adduction moment and varus moment. To understand that a wide step causes an external valgus moment one should look at the ground reaction force instead of the force acting at the center of mass (red arrow). The ground reaction force points upwards and passes outside (laterally) to the knee. Consequent a valgus moment is induced at the knee. Hope that helps.
So ultimately sidestepping should be with feet as close as possible? What's the other main points I got lost on the point of torso upright and bending knee more, or was it rotating trunk?
valgus moment isnt equal do knee aBduction moment? He keeps saying that a valgus moment is the same as an adduction moment. I dont understand... Cant understand neither how a wide step creates an valgus moment instead of a varus moment...
I think this is a confusion around internal vs external moments. In this talk I am referring to external moments (the applied moment) as opposed to the internal moment (muscle support moment). The moments are equal and opposite. Most gait studies refer to internal moments, however most of the ACL research uses the external moment.
Thank you for watching Alasdair's prsentation. You can find the full lecture series here: th-cam.com/play/PLI7VLEjUJidBpOCEyXIfHVHfLa5AhSqUm.html Please note that I do reply to questions/comments, but all previous responses have been lost in transitioning the channel over to my new email address.
Thank you for putting this series together! It's a great idea :-)
Great stuff, really looking forward to this series!
Abduction moment and valgus moment are often used interchangeable. Also adduction moment and varus moment. To understand that a wide step causes an external valgus moment one should look at the ground reaction force instead of the force acting at the center of mass (red arrow). The ground reaction force points upwards and passes outside (laterally) to the knee. Consequent a valgus moment is induced at the knee. Hope that helps.
Excellent.
Great idea, thanks for this!
So ultimately sidestepping should be with feet as close as possible? What's the other main points I got lost on the point of torso upright and bending knee more, or was it rotating trunk?
@@biomechstu thanks
valgus moment isnt equal do knee aBduction moment? He keeps saying that a valgus moment is the same as an adduction moment. I dont understand... Cant understand neither how a wide step creates an valgus moment instead of a varus moment...
I think this is a confusion around internal vs external moments. In this talk I am referring to external moments (the applied moment) as opposed to the internal moment (muscle support moment). The moments are equal and opposite. Most gait studies refer to internal moments, however most of the ACL research uses the external moment.