From researchers at Essen Germany , found strong evidence for short-term effectiveness and moderate evidence for long-term effectiveness of yoga for chronic low back pain.
Clin J Pain. 2013 May;29(5);450-60
From the dept. of spinal surgery, Mie U. Japan, low back pain was significantly alleviated when test subjects were in an amusement park, though temporary, demonstrating that enjoyable activities lessen low back pain.
J Pain Res. 2012;5:409-13