+ everything above!
I started focussing on core this winter, plus upped the riding intensity!
I'm to the point where I workout fro 45 mins in the morning before work, core and legs/upperbody alternating days. Then I ride/train/race/recover in the evening for roughly 90-120 minutes.
I can feel the six pack down there, but it's still covered by a nice little layer of 42 year old fat! I look better then last year, but not ripped like some of the young guys. To get there would take more concentrated workouts and a definite change in my diet.