Biomechanics and Sports Injury Prevention | Dr Alasdair Dempsey

Lecture 1 of the Sports Biomechanics Lecture Series #SportsBiomLS
Alasdair Dempsey covers the biomechanics behind anterior cruciate ligament (ACL) injury mechanisms in sports, with reference to underlying mechanical principles such as moments and moment arms. He also discusses the evidence behind potential intervention strategies to prevent / reduce risk of ACL injuries in sports.

00:00 Sports Biomechanics Lecture Series
02:04 Sports Injury prevention and Biomechanics
04:54 Injury Prevention Model and Biomechanics
10:06 Moment and Torque
11:16 ACL Loading and Support
19:12 Technique Modification for ACL Injury Prevention
27:33 Future Lectures

Links to key papers discussed in the lecture:

[karenroemer]

Thank you for putting this series together! It's a great idea :-)

[jizzywix]

Great stuff, really looking forward to this series!

[jannireto]

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.

[BuffetBuff]

I guess I want to encourage you since I know how hard you work at athletics and the injury can be compounded by the distress of the idear that this moment has sabatoged the possibility of that prized win, record or medal (you aren't alone)
what's the old addage? Oh that's right, an ounce of prevention is worth a k or a pound of cure🐋

[newglorydays-yubb]

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?

[goncaloandrade]

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...