Treatment effects were also observed in secondary outcomes ( mean group difference [ 95 % CI ] ) : BASDAI : -2.0 ( -3.6 , -0.4 ) , BASFI : -1.4 ( -2.6 , -0.3 ) , arterial stiffness ( estimated median group differences [ 95 % CI ] ) : AIx ( % ) : -5.3 ( -11.0 , -0.5 ) , and for PVW ( m/s ) : -0.3 ( -0.7 , 0.0 ) , VO2 peak ( ml/kg/min ) ( mean group difference [ 95 % CI ] : 3.7 ( 2.1 , 5.2 ) and trunk fat ( % ) : -1.8 ( -3.0 , -0.6 ) .