Indigo fitness was formed in 2014 by the merger of indigo23 and leisure lines indigo specialises in equipment for weightlifting strength and conditioning all strength equipment is designed and manufactured at their factory right here in the uk the indigo r2 back extension targets the important erector spinae muscles of the lower back the area associated with many back problems key features of the indigo r2 back extension yellow joint centre indicator ensures users hips are aligned with mac