Hi, I would like to find out if one needs to redo their AeT testing between seasons? I find as its coming in to winter now my aerobic heart rate threshold can drop by about 5bpm due to the cold, and conversely go up by about 5bpm due to the heat!

Just wondering if I am not the only one who has observed this happening?

I know several outside factors can affect your heart rate but the temperature seems to have quite a strong effect it seems!