“Do Physical Activities Trigger Flare-ups During an Acute Low Back Pain Episode?: A Longitudinal Case-Crossover Feasibility Study”. Is a useful report as we continue to make the connection between, excessive sitting  and back pain.
The big question was this: whether physical activities trigger flare-ups of pain during the course of acute low back pain (LBP).
The conclusion:
Among participants with acute LBP, prolonged sitting (>6 hours) and stress or depression triggered LBP flare-ups. PT was a deterrent of flare-ups.
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