- Liittynyt
- 3.2.2010
- Viestejä
- 1 008
Ovat aina olleet.
Ohan sitä tutkittu, polvi on suojatuimmassa tilassa alhaalla. Yleinen luulo vaan on, että olisi haitaksi polville.Ja miksi tehdä vajaalla liikeradalla ;)The knee has four main protective ligaments that keep the femur from displacing on the tibia (ACL, PCL, MCL, LCL). These four ligaments are most effective at their protection during full extension and full flexion. Full extension would be when you are standing; full flexion would be when there is no daylight between your hamstring and your calf. When the knee is at 90 degrees of flexion (the halfway point), these four ligaments are almost completely lax and cannot exert much if any of a protective force at the knee (Zatsiorsky V. Kinematics of human motion. 1998 - published by Human Kinetics - p.301).
Unfortunately, the position where the protective ligaments of the knee are not doing any protecting is the common recommended stopping point of a squat. Therefore, as it as it turns out, this is the exact worst place you could reverse the motion under load.
If flexibility allows (heels staying planted, torso not flexing forward past 45 degrees), then a full squat where you lower yourself all the way to the ground is far safer on the knees than the traditional half squat. Guess what joint angle most leg extension machines start at? If you said 90 degrees, give yourself a pat on your healthy knee. This makes a full squat even safer than a leg extension machine (Wilk K et al. A comparison of tibiofemoral joint forces and electromyographic activity during open and closed kinetic chain exercises. Am J Sports Med; 24(4):518-527).
So am I telling you never to do parallel squats? No! Am I saying that you’ll injure yourself on a parallel squat? No, again! What I’m trying to do is simply make an argument for the safety of full squats, thereby relegating squat myth #2 to the fiery pits of hades."
- Marc McDougal
Tollasen ny googlasin nopeaa...
teinitytöt tönii toisiaan, että hei kato tota! ja sit ku on menty ohi ni hihitetään seläntakana ja kuuluu jotain että hyi mitkä lihakset :wtf: voivoi ku pikkutytöt ei oo nähny lihasta omissa mies/poikaystävissään vaikka suurennuslasilla hakis. hahhah 
elikkä ilmeisesti jotain kehitystä on sit saatu aikaseks, vaikka sitä ei itse näe juurikaan... no kannustaa vaan tekemään kahta kovemmin töitä tulevaisuudessa
