After running a report on Garmin Connect, I saw what I suspected was the case with my training this year, very little elevation. Granted, I ride in very flat areas, SE WI, NE IL, but I'm about 25k in elevation short from last year. I'm going to be doing a fairly hilly, for me, century in 3.5 weeks. There are some short 6-8% climbs around here that I can train on. How many hill repeats do I dare try to cram in during the next 3 weeks? 49 year old male, about 2,200 miles so far this year. I'm not worried about the distance as much as the distance+climbing. Thanks.