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The video, available at http://nccam.nih.gov/video/yoga, highlights the work of two respected researchers in the field of yoga. George Salem, Ph.D., at the University of Southern California, uses innovative technology to examine how older adults use their muscles and joints in certain yoga postures. Karen Sherman, Ph.D., M.P.H{{MPH}}, at Group Health Research Institute in Seattle, focuses on how yoga may be a beneficial complementary health practice for people with chronic low-back pain.