At altitude there is less oxygen, therefore, if all your training is at low altitude/sea level, you will probably find that altitude will affect your performance adversely.
Think about lots of elite atheletes (from rugby to cycling) who train at altitude or arrive for a competition some time before it starts to get used to altitude (like Trek says).
Conversely, if you train at altitude, you will find your performance will probably improve when you drop towards sea level...
Good luck, tprevost![]()



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