It's physics really.RedVee wrote:
Also, he suggested that a 3Kg weight drop will reduce the stress through the knee by some rediculously large figure. 120kgs I think. Any ideas on how that works?
Your knee is a hinge point… If you squat down, the knee extends away from your hips (out of vertical alignment)… then this is countered back towards your centre of gravity at your ankles.
So all that force goes out to your knees and back. When you’re standing, it’s all in a straight line, so 2kg is pretty much 2kg… however, when you squat. That 2kg gets multiplied. The resultant forces in the knees and ankles can be HUGE.
On my leg day (I never skip leg day, by the way )… I rock-bottom squat 60kg as a warm-up… I then move into what I call a “mega set” where I’ll squat 100kg for 40 reps… as I go down, I try to go as low as I did with the 60kg, but you can certainly feel the forces being applied to the knees at that bottom point.
Recently, I’ve been squatting up to 130kg and MAN, it’s a lot of weight to do properly.
Back when I was a much younger man in my 20’s, I could squat for reps with upwards of 200kg on the bar… but, as a 51-year-old, and 19 years of no weight training, my progress isn’t all that rapid. But I’m still very happy with the results (I’ve got quads again! Woo hoo!)