The sciatic nerve runs very close to the pirformis muscle. So if there is injury to the piriformis, this muscle will naturally tighten and constrict. When it does, it is prone to pressing on the sciatic nerve - leading to the discomfort that too many of us are familiar with.
Two of the best ways to prevent bouts of sciatica is through the application of a diathermy (deep heat) treatments to the piriformis and L4/L5 region of the lower back - along with exercises to keep the piriformis muscle healthy and functioning well.
Regarding exercise considerations, the following article we posted on our Facebook page provides 10 of the best ones: