Originally Posted by musicmaster

Running:
My training pace for running is around 7:15/mile and around 165bpm. My marathon pace (6:00/mile) is around 180-185bpm. Short sprints (like 1/4 mile) I can get up to 200bpm.

Cycling
If I'm on a flat surface, no wind going like 18-20mph, my heart rate is around 130-140. Even an extended climb (Golden, CO's lookout mountain) I was hitting only 160. The only time I've gotten above 170 on the bike is with sprinting. If I try to say go harder up the mountain, my legs give out half way through.

Distance running uses your legs more as a spring -- sprinting and running up hills are what generate power for running. So while my legs are strong and toned for a marathon, a lot of power-intense riding puts me in the red well before I'm there aerobically.

That's why I'm looking at power meters. I figure that they would give a better picture of my training and ability and I can begin to structure my rides and workouts around it.