no altitude sickness on a bike ?

[vincent danna]

hello,
when i was doing backpacking in the mountains over 4-5 000 meters, i has to be careful to respect the altitude sickness criteria : not going "high" too fast, sleep under the highest level reached during the day, etc ...
when on a motorbike, "high" in the mountains over 4-5 000 meters, i don't respect the altitude sickness criteria, and i have the feeling that my body is fine.

so i wonder why ? is it because we have less physical efforts on a bike ? do you have any different experiences, or do you feel the same ?

anyways, enjoy it "high" in the mountains :-)