Inversion for ligaments?

[tyciol]

The advice has been given that hindu squats will strengthen the knee's ligaments due to the forces placed on them. I was wondering for those familiar with gravity boots, inversion tables, or even just hanging upside down knee-flexed from monkey bars (that doesn't seem very comfortable, pressure points) what you think things like this would do for knee ligament strength?

No doubt the muscles crossing the knee will tense, but after a while if they relax, it would be ligaments holding your skeleton together. Obviously something like this would be approached very gradually. I know if I were to begin such training it would be with the use of a table that, with controlled arm movements, can maintain any angle from horizantal to vertical, which could easily revert you to a stable position if there was any discomfort.

The way I figure, it would be ideal to have a leg strong enough so that if you were to hang from one leg, you would not be injured. By gradually inverting, and then by holding successively heavier hand weights to increase that load, it would seem this is possible. Although I don't think most tables go that heavy, so converting to gravity boots from a bar might be better. I just don't think it is good to begin with gravity boots since without a base of strength, you could risk injuring by putting all your weight on the legs all at once, as well as the risk of being stuck upside down.

If you wait until later, then you could train 1-legged with the boots, and then if you are hurt or weakened, you would drop any handweights, attach your other leg, and easily get up.

I'm thinking training like this, along with doing dips and chinups, would be very good for decompressing the spinal vertebrae to allow fluid to get in, a good thing before going to sleep at night (though maybe not ideal before doing heavy squatting, I dunno). This seems to be a large advertised function. Wouldn't it also put stress on the spinal ligaments and maybe they'd become stronger over time with good rest/nutrients?

I know when the spine is flexed and the erector spinae are overstretched, weight can get put on the ligaments rather than the muscles too, so I was thinking maybe traction-training would be a more controlled/safe method of stressing them than rounding your back doing deadlifts or whatever.