I have recently been diagnosed with T1. I'm an avid cyclist and ride to work most days. About 25km each way.
My Endo has encouraged exercise however I keep finding that I am going low most days on my ride home. I even have carbs and sugar prior to leaving work to get my BSL at around 9mmol, however about 3/4 on the way home I usually start to feel the signs of a Hypo and my BSL drops to about 3.0mmol.
Its got a point where I cant even be bothered exercising as I am getting too many lows.