I have had leg and back ache for the past 15 years, so I watched the below movie with great interest. I'd love to try it, but there is nothing on the market in the US, or at least I could find nothing.
The closest I found were ankle weights, but of course they are a different dynamic. And even beyond that, the quality of what's on the market seems abominable.
If you know of a good solution, or if you are an inventor, please contact me at this blog. Thank you.