Based on ANCOVAs , participants in the treatment group exhibited significantly greater improvement in WOMAC pain ( adjusted means [ SE ] ) ( 8.3 [ .67 ] , 5.8 [ .67 ] ; p = .01 ) , stiffness ( 4.7 [ .28 ] , 3.4 [ .28 ] ; p = .002 ) and SPPB ( repeated chair stands ) ( 2.0 [ .23 ] , 2.8 [ .23 ] ; p = .03 ) at 8 weeks .