Tight hamstrings are a huge contributor to low back pain. They are also rather difficult to get back to a condition where they aren't restrictive.
I've had mine scraped (Graston technique) numerous times and it helps, but it really takes some serious stretching to regain some mobility....at least it has for me.
As Obs mentioned, a good chiro/sports physio can be a huge help.
There are 3 loves in my life: my wife, my English mastiffs, and my weightlifting....Man, my wife gets really pissed when I get the 3 confused...
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