After 12 wk , the treated group had a significantly better total SPPB score ( = 0.41 0.24 points ; P = 0.03 ) , chair stand times ( = -1.31 0.33 s ; P < 0.0001 ) , and 4-m walking speeds ( = 0.14 0.03 m/s ; P = 0.006 ) than did the control group .