Well I have done the 16 miles yesterday, the 7 mile ride in today and will do the 9 mile ride out. Mind you, weatherman says that the temp is gonna hit 98 today and 97 tomorrow... I'm carrying extra Nuun and Gatorade, will leave with a full 3L tomorrow, was considering an extra water bottle cage to carry two full Gatorade (sugary) or U Hydration (sugary Nuun) since I have points on my bike to bolt stuff to still (seat tube has a mount point for water bottle cage).
I also run up the stairs when I go between floors. They moved me down to the fourth floor instead of the fifth, so I don't run as far; but I get off the bike completely busted, go through security, then run up four levels. Also there's the trip down and back up for lunch, sometimes.
Well, at this point, my leg muscles are feeling somewhat stiff. They're not sore, though ... I mean I can beat on my legs without feeling pain. I've gone all-out before and then found that I'd black out for a tenth of a second if I swatted my leg hard () after a few days of pounding.
Thing is, when I did that, I... still felt like I could bike to work for 2 more days, going all out at it, even though the muscles were so sensitive that blunt impacts produced black-out pain. And right now I feel like I could do today and tomorrow, making three days this week, without a problem. Might even pack on an extra 18-ish miles today after work to go retrieve something, in the extreme heat.
I either just can't tell when my body's failing or my body is so awesome that it can deal with it and do all the repairs and upgrades while under heavy physical stress. I'm leaning toward a mixture of both.
Still. I just can't tell where I should stop.