The US Army actually banned it
Scientific support for the notion that squatting is harmful to the knees dates back to studies carried out in the 1950s and 1960s. This research basically suggested that the squat exercise, even when properly done, stretched knee ligaments in both medial-lateral and posterior-anterior directions, leading to increased instability in the knees. Because of these investigations, some branches of the military in the USA actually discontinued the use of squatting in their training programmes ('Safety of the Squat Exercise,' Current Comment from the American College of Sports Medicine, pp. 1-3, March 2000).
But there were some problems with this anti-squat research. In one study, for example, the subjects were active parachute jumpers. 'Sky divers' are notoriously prone to knee injury, both because of the high impact forces associated with landing from a jump and because a diver's legs may be caught in parachute lines as a parachute opens, straining the knees. Thus, the increased knee laxity in these subjects may well have been the result of their jumping, not their squatting.
Nonetheless, squatting has continued to have a stain on its character, although its bad reputation has faded gradually because of 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.
zrozum jedno - cialo dziala jako jedno. miesnie, stawy, sciegna, tkanka laczna - to wszystko pracuje jednoczesnie. cwiczenia jak przysiad sa
naturalne. dolozenie ciezaru do przysiadu jest mniej szkodliwe niz na suwnicy, bo suwnica 1) nie wymaga stabilizacji 2) nie uzywa dwuglowych uda 3) stawia plecy i biodra w nienaturalnej pozycji.
wpisz sobie w google "squat vs leg press" czy cokolwiek w tym stylu i poczytaj.
nowe dane wskazuja na przysiad jako
zdrowszy, nie tylko dla kolan.
kregoslup sie meczy? moze jeszcze martwe ciagi tez nie, bo sie kregoslup meczy :?
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