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by hector_ka 3021 days ago
I would look into Electronic Muscle Simulators. Just search Amazon. There are dozens of units.
1 comments
bgdkbtv 3013 days ago
Looks like those things that are advertised on marketing channels to get abs while sitting on a couch:

https://www.amazon.com/s/ref=nb_sb_noss/143-0074589-0085364?...

How are they helpful?

link