Archief - Power training

herc zei:

Super reply stancke!

En qua druk op knieen en belasting op kuiten, hoe verhouden full squat en front squat zich daar tegenover elkaar?

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L0$t Pr0PhEt zei:

Zo'n dingen zou ik toch niet zeggen zonder argumenten.

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L0$t Pr0PhEt zei:

Idd ik heb ook het gevoel dat mn knieen sinds mn blessure sterker zijn geworden door full squats te doen

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warre zei:

Het is wel zo dat je belasting en slijtage op je meniscus bij diepe knieflexie groter is dan wanneer je gewone squat doet ipv full-squat.



Kan zijn dat je meniscus door altijd fullsquat te doen aan het afslijten is en dat je daar nu nog absoluut geen last van hebt maar op latere leeftijd kan dit wel sneller opsteken dan wanneer je je knieën op een mindere manier zou belasten.

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Some physicians condemn the squat, citing how destructive they are to the knees, despite scientific studies and millions of personal experiences to the contrary. One sports medicine doctor explained to me why squats were considered to be bad for the knees. He was actually telling me this between his sets of squats! Since sports medicine doctors only see people with injuries one can guess why they may have developed this belief. The individuals they treat certainly do not constitute a random sample, let alone a representative population which, as any scientist knows, is essential to even attempt to formulate inferences.

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"Squats, when performed correctly and with appropriate supervision, are not only safe, but may be a significant deterrent to knee injuries."

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Kreighbaum (1996) illustrates the safe position of a deep squat with the knees extending beyond the toes. Kreighbaum explains how a deep squat can be performed little chance of injury to the knee. The variables of concern:

- speed of descent
- size of calves and thighs
- strength of the controlling muscles

The primary danger to the knee occurs when the tissues of the calf and thigh press together altering the center of rotation back to the contact area creating a dislocation effect. The danger of knee injury in this situation may be prevented if either of the following factor are present:

- center of gravity of the body system is kept forward of the altered center of rotation
- muscles of the thigh are strong enough to prevent the body from resting or bouncing on the calves.

Kreighbaum concludes the deep squat is of little danger to the knees unless these variables and factors are disregarded.

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warre zei:

mijn cursus bijzondere gezondheidsleer, en om het dan online nog wat zichtbaar te maken een link gevonden http://www.tlichtpuntje.be/info/meniscusletsels.htm

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Ascent from a squatting position appears to be a consistent and common mechanism of meniscal tear after the age of 20 years in the course of normal activities. Degenerative change within the meniscus may occur at an earlier age (after the age of 30 years) than generally appreciated and play a substantial role in increasing the vulnerability of the meniscus to injury.

vanuit The causes and mechanisms of meniscal injuries in the sporting and non-sporting environment in an unselected population

G. I. Drosos a, b and J. L. Pozo Corresponding Author Contact Information, E-mail The Corresponding Author, b
a Athens Naval Hospital, Deinokratous 70, Athens 11521, Greece
b Royal United Hospital, Combe Park, Bath BA1 3NG, UK
Received 28 April 2003; accepted 24 June 2003. Available online 6 April 2004.

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jerri zei:

Na jaar rust weer begonnen met fitnessen.
Al 5 weken 3-4x/week en 2x voetbal.

Mijn benen zijn van nature sterk en ik neem meestal 3x12 160/170/180
Meeste dat ik al gedaan heb is 12x 210.
Probleem is dat ik krakende knie heb, kraakbeen denk ik.
Kan ik hier iets aan doen? Het doet geen pijn maar ik voel het altijd wel.
(heb ook al eens gepost bij Powertraining pics topic--> stancke gene negatieve comment pls :d)
Ik wil dus graag mijn benen verder trainen maar vermits het blijft kraken kan ik nooit door trainen.

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Nonetheless, squatting has continued to have a stain on its character, although its bad reputation has faded gradually thanks to studies like the one carried out at the University of Alabama. In that work, the knees of 100 male and female college students were measured for stability using a knee ligament arthrometer during nine different tests ('The effect of the squat exercise on knee stability', Medicine and Science in Sports and Exercise, Volume 21 (3), pp. 299-303, 1989). Over an eight-week training programme, individuals who carried out various squatting exercises did not develop reduced knee stability, compared to non-squatting controls. To assess the effects of longer-term squat training, the researchers examined 27 male powerlifters (14 of whom were rated elite or master class) and 28 male weightlifters (eight of whom were elite or master class) using the same tests. As it turned out, the knees of powerlifters and weightlifters were actually significantly LESS lax than those of control individuals during tests of knee-joint flexibility. When the data on powerlifters and weightlifters were also analyzed according to years of experience and skill level, no negative effect of squat training on knee stability was demonstrated in either of the groups tested.

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Recent research carried out at the American Sports Medicine Institute in Birmingham, Alabama supports the idea that squatting is not only relatively safe for the knees but also can be superior to open-chain exercise for improving knee stability and strength ('Biomechanics of the knee during closed kinetic chain and open kinetic chain exercises, Medicine and Science in Sports and Exercise, vol. 30-4 (April), pp. 556-569, 1998). In this Alabama investigation, 10 male subjects performed three repetitions of closed-kinetic-chain exercise (squats and leg presses) and open-kinetic-chain exercise (knee extensions) at their 12-repetition maximums (i.e., using a resistance great enough so that no more than 12 reps could be completed). Kinematic, kinetic, and electromyographic data were calculated using video cameras (60 Hz), force transducers (960 Hz), and EMG (960 Hz). Mathematical muscle modelling and optimization techniques were employed to estimate internal muscle forces.

Overall, the squat generated approximately twice as much hamstring activity as the leg press and knee extensions, as one might expect (the limited activity of the hamstrings during extensions is a no-brainer; the superiority of squats over leg presses in stimulating and thus improving the strength of the hamstrings is due to the fact that during squatting the hamstrings must control hip flexion, whereas leg presses are usually carried out in a seated or lying-down posture, removing the requirement for the hamstrings to support and control the hips). Quadriceps muscle activity was greatest during squats and leg presses when the knee was near full flexion (which by the way means that if you can increase the depth of your squatting safely, you should by all means do so) - and in leg extensions when the knee was near full extension.

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cuda zei:

en zoals ik in de andere thread al zei:
210kg fullsquat?

zeg dan direct erbij welke oefening je 210kg neemt.

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L0$t Pr0PhEt zei:

Zo kunt ge nog lang bezig blijven.

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warre zei:

knie stabiliteit heeft niets te maken met schade aan de miniscus, ik kan ook een wetenschappelijke studie aanhalen dat powerlifters sterker zijn dan de controle-conditie. Zo kan ik nog lang bezig blijven

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antHraxx zei:

vandaag wa cardio gedaan, 10 km ( ineens ook training voor de 10miles)
heb mijn hartslag eens gemeten in rust, 88 wtf ?

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herc zei:

Wanneer heb je dat gemeten? Na het lopen? 's morgens bij het opstaan?

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