There is a very simple exercise you can do to illustrate the continuity in the Superficial Back Line myofascial chain between gastrocnemius and hamstrings.
At the muscular level, myofascial release (MFR) is commonly believed to ease fascial gliding motion, releasing adhesions between fascia.
Are we really able to singularly and specifically isolate fascia…, to the exclusion of all other tissue… to create change? To that I am quite uncertain.
A low back sprain and strain present a similar clinical picture. The client/patient will have low back spasming and pain, which will increase with motion.
The two most common causes for a low back sprain / strain are macrotrauma and repetitive microtraumas, often involving bending and lifting.