[Scott Johnston]

I’m sorry to hear of Bjorn’s experience. Overtraining is something you don’t want to wish on anyone but your worst enemy.  But I have seen some very high level cycling coaches recommend a drift test for determining AeT.

Bjorn makes a very good point in that the muscle loading in cycling is VERY different from running.  If you try to cycle at your running AeT your legs are going to be the limiter very quickly unless you are well trained as a cyclist too.  That’s because cycling isolates a much smaller muscle mass than running does.  Many runners who end up using cycling for recovery or to get them through an injury will feel like cycling at their running AeT HR is like an ME workout for their quads.  This may have been what happened to Bjorn. I’ve seen it happen before to others.

At the very least do a 1 hour HR drift test on the bike and see what you get for a AeT.  Then be sure that in your easy riding you do not feel like your legs are blowing up.

Scott