Holly Silvers-Granelli _ Altering biomechanics to mitigate ACL risk?

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  • Опубліковано 22 лис 2020
  • #sportfisio2020
    @hollysilverspt
    @SportfisioSwiss

КОМЕНТАРІ • 8

  • @andresheredia1440
    @andresheredia1440 3 роки тому

    Woow amazing as physiotherapist I appreciate that you can share this videos , thank you so much.

  • @filipzivkovic4866
    @filipzivkovic4866 3 роки тому

    I think it's terrible to say that knee valgus is deleterious. When you couple IR of the femur, IR of the tibia and pronation of the foot, you actually get a safe and very strong propulsive position. Is there anything special about FIFA 11+? I don't think so. Basically, it consists mainly of running drills, landings and strength training. So the conclusion is: If you put children through some kind of resistance training, running drills and expose them to "risky" situations, they'll be much safer. Just my opinion.

    • @andresheredia1440
      @andresheredia1440 3 роки тому +1

      Hi , it's very interesting your opinion, but I don't know , the biomechanical factor always depends on the capacity load that each person has that is the reason to identificate o relate if it is a risk factor or not?. Gritings from Ecuador.

    • @filipzivkovic4866
      @filipzivkovic4866 3 роки тому

      @@andresheredia1440 Yes, I know there's a lot of evidence, but I think it can be misguiding. Try the following: lateral change of direction. Is it even possible to do it without "valgus"? If you try to push your knee (tibial ER) out and you don't have your medial foot on the ground, you just sprained your ankle.

    • @lizsalas4894
      @lizsalas4894 3 роки тому

      @@filipzivkovic4866 sorry but no. Valgus alignment produces knee abduction torque, which elongates the ACL and can tear it. When pushing off, even if laterally, you may start with the entire foot, but you'll push off with the planted portion of the foot (which should be the forefoot). If have weak ankles, then you'd have to compensate by doing what you're saying - but that would result in an increased risk of ACL injury. Her presentation is on point.

    • @filipzivkovic4866
      @filipzivkovic4866 3 роки тому

      @@lizsalas4894 Yes, valgus in less that 30 deg od flexion selectively loads the ACl, but can you visually tell what "amount" and timing of valgus is acceptable or not? Weak ankles - how do you exactly measure it? What are the cut-off points for ankle strength? All the things you just said are theoretical, sorry. A great example of epiphenomena and ex-post narratives. And please don't tell me you're gonna correct valgus with a band around your knees :)

    • @lizsalas4894
      @lizsalas4894 3 роки тому

      @@filipzivkovic4866 lol What’s the problem if they’re theoretical? Umm anyway, I invite you to watch some videos of acl tears… see how the knee buckles in the valgus direction in most cases.
      The changes of direction that you’re referring to are only for the leg that’s opposite to the lateral direction on which the player is going… when the musculature of the leg are loaded concentrically. In these cases the load of the acl is different, and not as risky. When you’re landing though, and the knee goes into valgus without sufficient control, your risk is high. You don’t need to measure your 30 deg, but more so be aware of the kind of loading on the knee in that posture. The posture is only relevant when force is present. Maybe take that into account… it’s perfectly clear the kind of risky actions they imply.
      To answer your question on how do I measure things? In different ways thru biomechanical analyses - video, IMUs, mocap, magnetic sensors, electrogoniometers, etc.