Does anyone inject fast acting insulin during a long cycle ride? I am riding 100 miles in the Ride London event early August in aid of DUK. I did it two years ago and apart from my regular dose of basal (Levemir) in the morning didn’t take any insulin during the ride. I snacked all the way round and felt good . Two years later I now take mealtime insulin (novorapid) and wonder if I need to use it during the ride and should I do anything different with my breakfast injection? With only a few weeks remaining I probably can only get in a couple more 70+ mile rides so don’t have an opportunity to experiment but wondered if anyone had any advice please.