Flexibility improvement in group 3 were the greatest ( 21.6 % ; P < 0.05 ) , smaller in group 2 ( 12.6 % , P < 0.05 ) and smallest in 1 group ( 5.1 % , P < 0.05 ) , while control group changes were insignificant ( 1.7 % , P > 0.05 ) .