Goosey
.
Some say it's a knee wrecker.
Some say don't fully contract the knee because it will fuck your knees up.
i jumped onto my leg extension yesterday, to do my 12 rep's and noted that someone was using the whole stack.
(id done a set on the leg press
jumped on the hammer for twenty reps, then the leg extension) my quads were fried and I wanted to make sure they received enough work.)
My first thought was this person who used this machine prior to me was either huge, and I mean has thighs the size of a mature bull elephants leg which I doubt, or as I've stated before he is just stupid and tough....is on their way to a blown knee, not now, but at some point in the future
ive seen blokes load up the machine and swing away.
let me point out the mechanical inefficiency of the leg extension, I'll keep it brief and hope you understand.
if the quad is producing force of say 1200 pounds to lift the weigh, 1000 is exerted over the top of the kneecap and remainder is lost through friction.
the effective point of attachment is halfway down the shin in the wrong direction, 80% of the force is being wasted.
a man pulling lifting 300kg produces 4000kg of pulling force with the quad, exposing the knee to 7000kg of compression force.
salient points:
So, lessen the weight, move slow, move even slower on the negative phase and fully contract the quad and squeeze the shit out of it and hold for two seconds, at this point ther is zero force on the knee, and 100% on the quad, full resistance on a contracted muscle is where all the magic happens.
Make sure your hip is anchored in the seat and the backrest is angled back.
Some say don't fully contract the knee because it will fuck your knees up.
i jumped onto my leg extension yesterday, to do my 12 rep's and noted that someone was using the whole stack.
(id done a set on the leg press
jumped on the hammer for twenty reps, then the leg extension) my quads were fried and I wanted to make sure they received enough work.)
My first thought was this person who used this machine prior to me was either huge, and I mean has thighs the size of a mature bull elephants leg which I doubt, or as I've stated before he is just stupid and tough....is on their way to a blown knee, not now, but at some point in the future
ive seen blokes load up the machine and swing away.
let me point out the mechanical inefficiency of the leg extension, I'll keep it brief and hope you understand.
if the quad is producing force of say 1200 pounds to lift the weigh, 1000 is exerted over the top of the kneecap and remainder is lost through friction.
the effective point of attachment is halfway down the shin in the wrong direction, 80% of the force is being wasted.
a man pulling lifting 300kg produces 4000kg of pulling force with the quad, exposing the knee to 7000kg of compression force.
salient points:
So, lessen the weight, move slow, move even slower on the negative phase and fully contract the quad and squeeze the shit out of it and hold for two seconds, at this point ther is zero force on the knee, and 100% on the quad, full resistance on a contracted muscle is where all the magic happens.
Make sure your hip is anchored in the seat and the backrest is angled back.