Personally, I write off late-July to early September because no matter what I do I always end up feeling like crap because of all the junk (mold and pollen) in the air. If you’re in the same boat, then you probably need to account for the fact that your immune system is running full gun right about now, even though you probably don’t notice it.

You basically have to tell yourself “OK.. I’m working under the same physical limitations as if I was sick today, even though I feel fine.” Which means you gotta eat well, and you’re gonna get tired out quicker.

Try it again in October/November and see how you do.