Delayed pain after usage.
I wish this product were a bit more widero, so as to have more squeezing of the product between your buttocks.  The setting from easy to hard isn’t much of a difference. After just the few times I’ve used it, I experienced random pelvic muscular type pain a few days after use, making it difficult to walk for a minute or so until pain passes.  Maybe it’s just spasms from not doing keel exercises..  Don’t know if this is a normal response to using this.
Rating: 3 stars