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cmh The air density stuff is counterintuitive. But you found the reason.
I am sure that the fatigue is less. The reason is that I am resting more and let my ATP-PC system have more recharge time. The warmup set and mid range rep sets seem pretty easy. It is the last heavy set that feels hard but not fatiguing. I walk out of the gym feeling pretty good. Now, is it doing any good? Time will tell.
I have posted this before article before by the Aussi track strength coach. It has some tidbits of info that can be applied to a gym workout. IMO, the hot sauce of the gym workout for cycling is one leg jumps and to have a strong back. Although, he points out that for endurance road, the only useful part of gym work is to be able to take a crash and muscle imbalances. All the rest is gained on the bike.
https://forums.t-nation.com/t/traini...-cyclist/56012