I got a chance to connect with Heather Jackson, former Princeton varsity hockey player turned professional triathlete and Ironman. Only in her 4th full season, she has been on several Ironman podiums including wins at the inaugural Princeton 70.3 and on the hilly Wildflower 70.3 course. Heather was recently featured on the cover of Lava Magazine.
Heather's advice: go ice skating and get into the weight room. In particular, "lots of high reps and low weights for exercises like squats." And by "high" she means 100 reps until failure to really mimic pedaling on the bike.