Secondary outcomes included patient reported disease activity ( Bath AS Disease Activity Index -LSB- BASDAI -RSB- ) , physical function ( Bath AS Functional Index -LSB- BASFI -RSB- ) , and CV risk factors measured by arterial stiffness ( Augmentation Index -LSB- Alx -RSB- ) and Pulse Wave Velocity -LSB- PWV -RSB- ) , cardiorespiratory fitness ( VO@ peak ) and body composition .