Moved from sea level to Boulder back in August. so basically 6 month. You would be acclaimated to the altitude for daily easy activity. but for aerobic sports like cycling and up a hill... whew. it will take a while longer. I normally train at sea level and I used to take like a one/two week trips into the sierras or into the rockies to train. My resting heart rate at altitude was gosh want to say like 20% higher?? and my power output was non-existent. You are working lot harder than you think!!

Give a pat on your back and you are just doing fine (provided its not asthma) Being able to climb at higher elevation is a feat in itself. Lunacycle can attest to that I'm sure. She said she was from Boulder area.

And learn to spin, learn to use your calf, ham string, glutes... Your quads will love you for it.

smilingcat