Kobe Bryant training commercial...

[Citruscide]

You afraid of the big weights?

Nope. Never have been. If I come to a road where I think I'll need chains to do the big weights, I'll call you first.

C-ditty

 

[louden_swain]

chains can be picked up at Home Depot.

 

[casualbb]

Question: aren't bands just as effective? Probably at least a bit more convenient too

-casualbb

 

[t3c]

casual, i'm no expert...but from what i have read it is just another way of accomodating resistance. I would think that the bands would be more stressful on joints too, so it would be good to switch up.

 

[edgecrusher]

The bands are somewhat more stressful on the body, due to the fact that they are actually pulling down on the bar. This is apposed tp the chains, which basically just lay on the bar. Plus the chains look more impressive for a commercial.

 

[casualbb]

actually pulling down on the bar.

...but so do chains, through gravity.

I'm pretty sure from my physics class that bands provide a linear tension boost. So the force downward on the bar would be proportional to the amount stretched. The same would be true of chains that were raising off the floor as you ascended.

Unless, of course, if you bunched up the chains. Then it'd be like when you hit one single spot a buncha resistance is added.

I'm just wondering if there's any effective difference between the two. From what I gather, both serve to counter the body's innate tendency to want to brake the motion near the top, making the movement more explosive.

-casualbb

 

[collegiateLifter]

...but so do chains, through gravity.

I'm pretty sure from my physics class that bands provide a linear tension boost. So the force downward on the bar would be proportional to the amount stretched. The same would be true of chains that were raising off the floor as you ascended.

Unless, of course, if you bunched up the chains. Then it'd be like when you hit one single spot a buncha resistance is added.

I'm just wondering if there's any effective difference between the two. From what I gather, both serve to counter the body's innate tendency to want to brake the motion near the top, making the movement more explosive.

-casualbb

no need to make this too complicated. Bands are harder on the body, Empirical evidence shows this to be the case and physics backs it up. The force provided by the chains is mass not on the floor times a constant of 9.8 m/s. the bands restoring force is indeed K (constant for that band) times X (distance stretched from equilibrium). While x and mass not on floor both increase at an incremental rate, the proportions are much different (i.e. raising a bar 6 centimeters may lift another 10lbs off the floor which changes chain weight from 40-50lbs, while say x was .1 m, now .7m is a much bigger increase proportionally. So in this case you would have 5/4 the force provided by chains at .1m at your new height; you now have 7 times the force provided by bands at .1m). additionally there are different constants in the case of the bands vs. gravity's.... bottom line is chains are less taxing on your body than bands.

 

[endpoint]

Maybe the powerlifters can help me out here...

I've heard of you guys using CHAINS and have even seen some pics... the chains are attached above and kinda hold the bar... (looks like the bar is suspended)

Well, in Kobe's commercial... he's doing squats... but the chains are attached and just hanging and laying on the floor... ?? Is that correct?

Just asking, I'm not familiar with chain work.

C-ditty

chains hang down to accomodate resistance and provide heavier weight at joint angles that are usually not "hard" (top of squat and top of bench)

attached to the rack holding the bar up is called a "suspended" movement where the initial lowering phase is taken out.

 

[edgecrusher]

no need to make this too complicated. Bands are harder on the body, Empirical evidence shows this to be the case and physics backs it up. The force provided by the chains is mass not on the floor times a constant of 9.8 m/s. the bands restoring force is indeed K (constant for that band) times X (distance stretched from equilibrium). While x and mass not on floor both increase at an incremental rate, the proportions are much different (i.e. raising a bar 6 centimeters may lift another 10lbs off the floor which changes chain weight from 40-50lbs, while say x was .1 m, now .7m is a much bigger increase proportionally. So in this case you would have 5/4 the force provided by chains at .1m at your new height; you now have 7 times the force provided by bands at .1m). additionally there are different constants in the case of the bands vs. gravity's.... bottom line is chains are less taxing on your body than bands.

Thank you, you said that much better then I ever could have