You can tell your friends that fascia jitter is a technique that stimulates the fascia and muscles on the body surface by specific means to achieve the effects of relaxing, relieving pain and promoting blood circulation. This technology can help improve muscle tension and stiffness, and promote physical recovery and health. Tell him that fascial shaking can be accepted not only in professional rehabilitation and massage places, but also by learning some basic shaking techniques, and pay attention to the moderation and correctness of the techniques when implementing it yourself. If you are interested in further studying fascial jitter technology, you can attend relevant training courses or consult professional practitioners. Please note that this is only a basic answer, and the specific situation needs to be decided according to your friend's interests and needs.