I've been using these Chinese cups pretty much daily now. I put them anywhere I can make them stick. Neck, shoulders, arms, legs, back, hips, armpits. Pretty much everywhere.

They seem to do several things. For one, they pull more blood through the muscle and help it relax and soften up. The other thing is, they pull on the muscles, rather than push, so it helps to decompress things and separate layers of muscle. I like to move around when the cup, or cups, are on there, that way it stretches the muscles even more.

Really, the only downside I see to these, is, all the purple marks they leave on your skin, but they fade after a few days, so I'm not too worried about it. I feel like they're helping me move better so it's worth it.