tired during the summer

I had the same problem for many years. The problem is seasonal allergies; which last most of the summer for me.

They often hit very fast, and when they do I can go from feeling great to horrible. There used to be days I could not work out at all. The main problem for me is having my sleep being disturbed due to congestion, which is fixed by taking sudafed and benadryl. I have recently discovered that taking the benadryl prior to working out also helps, even though it normally puts me to sleep. (The active ingredient in Benadryl is the same ingredient in some over the counter sleep medicines.) Apparently the benefit of combating the alergies outweighs any negative effect of the inducing aspects of the drug.

yeah, at the start of every summer, i'm just tiiiiiired all the time, especially if i'm just starting to run or just starting my base. For me, I'd say that the introduction of summer temperatures takes a little while to get used to. The heat just wears me out!

i feel tired, flat, and dehydrated

probably has a lot to do with the warmer weather. Even though you don't notice it that much just walking around, i'm betting that even 10 degrees warmer is going to be very noticeable when running. I like running in the evenings, but here lately it's been around 90 degrees, so i've switched to morning runs. I'm willing to get up early so I can have a decent run (even if i'm sleep) rather than feel like total ass the last 30 minutes of an evening run. =)

Heat and humidity. Takes me about two weeks before I don't feel like complete ass on every run. And that's if it stays really warm for two weeks. Too often around here it'll be 90 for 3 days then storm then back down to the 70s and the humidity will drop.

PS: I always knew a 90 degree day in the west would be much different than a 90 degree day in the midwest/south. After coming back from the Club Relay I now know that as fact. Highs were upper 80s to near 90 for the two days I was out there. Went running in Boulder that Saturday and barely sweat. It's been high 80s near 90 in Louisville for the last few days and every run has me finishing like I just took a bath. Of course I'm probably running just as slow in the humid slog as I would in the rare air.

Alan