I recently bought a piece of exercise equipment to help counteract all the time I spend sat in front of StackExchange. I thought I got a very good price for the base unit alone, but I obviously didn't understand the fine-print, because it came with a bonus attachment I wasn't expecting: a belt massager, just like ones from the 1940s.
(Caution: Image is for illustration only, and may not accurate represent the typical appearance of a Skeptics.SE moderator, or the modern equipment that has a narrower belt with some textured rubber. I can't even look at it, without falling into a bad impersonation of a 1940s newsreel, breathlessly advocating its benefits, using casually sexist descriptions of women and wondering "What will those boffins think of next?")
The poorly-translated manual says (amongst other claims):
physically obese, massage for half an hour every day morning and evening, you can achieve weight loss body effect.
I'll concede the manual itself may not be very notable, but there are apparently still enough people who believe belt massagers have some health value for them to be sold in 2020. I thought they were recognised as useless by the 1960s.
Before I throw it in the bin, I feel I should check: Are there weight-loss benefits to belt massagers? (I will accept evidence of other health benefits, too.)