Originally Posted by yogaman
Nope. Actually, ankle dorsi flexion means when the angle between the dorsum of the foot and the anterior shin decrease. I can bring the dorsum of the foot towards the shin or I can bring the shin towards the dorsum of my foot. They are both ankle dorsi flexion. I can also create ankle dorsi flexion actively, meaning using muscles directly responsible for that action (tibialis anterior, extensor hallicis longus , extensor diigitorum longus and peroneus tertius) or I can reposition my entire body in such a way that the joint dorsi flexes passively or I can do any combination thereof. YM
You are arguiing against the dictionary. Dorsiflexion means bringing your foot towards your shin and it does not, and I repeat, NOT mean bringing your shin towards your foot.
Originally Posted by razie
that's a cool MJ surely the boots allow us to do that
Dorsiflexion will bring either toes up or shin down, depends which is fixed and how they're weighted, won't it?
If you always plantarflex, it means you're fighting the pulling back and "getting forward" actions, which are trying to close the ankle... don't you think? Why fight yourself? You can also catch an edge and such, if you always plantar flex and never support the ski with the top of the foot... pay attention to those actions next time you go out.
The point is that if you pull your boots back AND plantar flex at the same time, you will press the ski tips into the snow, which sounds too early.
I can't picture the way you ski, if you say you never dorsiflex, but ski a 140 boot... do you use the ankles at all for tipping the ski on edge? Do you keep the boots really tight at the top?
No, dorsiflexion means bringing the toes up and not the shins down, that is the definition of dorsiflexion. Furthermore the difference between bringing your foot towards your shin or your shin towards your foot is vital, because you use entirely different muscles, even though the result might be the same. If your definition of dorsiflexing also includes bringing your shin towards your foot (which, again, is a wrong definition), then of course I dorsiflex like crazy... You would probably say MJ is dorsiflexing as well, but according to the definition of dorsiflexing he is NOT dorsiflexing. He is bringing his shins towards his feet, which, again, is not dorsiflexing. But again, if you'd say MJ is dorsiflexing, then yes I am dorsiflexing while skiing as well.
I do not always plantar flex, that is what you made out of my words. I said I keep tension by plantar flexing, but a certain amount of timing it is involved too. I would have ski some turns in order to feel in what phase of the turn I do what, I do not know that by heart. Plantar flexing and getting forward actions are definitely combinable though and I never feel like I am fighting myself when skiing.
Pretty hard to describe the way I ski, but I ski with race technique, that still does not tell you a lot though. I will try to get some footage up of my skiing this winter.
Yes, of course, I use my ankles to go from big toe, to small toe edge and vice versa... And of course my ankle will close too when I lean forward, I just do not use the muscles attached to my ankle to get in a forward position, like I have said several times.
I do not know what you consider tight... Also, tightness depends on what I am going to do (terrain/slope gradient/how aggressive I ski etc...)
Originally Posted by fatoldman
But it can mislead and confuse as in this case, leading to faulty conclusions.
Yes, you are right. It would be nice to have one fixed definition, luckily the dictionary is giving us one.