How useful are the sandbags for leg and wrist?

[Lucas]

i even recall hearing somewhere that doing your sport specific movement against resistance makes you slower. I know it feels faster when you take the weight away, but that's because there's less resistance.

I can't remember the source. Does anyone know?

The study i think it cited was that runners who run with parachutes behind them don't actually improve their speed because they're not running any faster, and because the motion with the added drag is different from a normal running motion so it's not training the correct movement. The article said to improve your speed past a certain point you have to run on a decline surface so that with the aid of gravity your legs are actually able to move faster and that will train the pathways to make your body move faster.

Does that sound familiar to anyone? I may have some things confused here.

don't quote me on any of this.

haaa!!!