LM Forest - looks like you have a lot of good info from a lot of smart and experienced people. FWIW as I was perusing the Forum and stopped here I provide my 2cents based on my experience and most recently and because of this thread my reflections of the last 48hrs.
- Follow the advice and see what works for you.
- At some point in a long Z2 ride you will need fuel NO FREE CHICKEN
- I am normally in the camp of fuel all workouts. The amount depends on the effort. I always carry enough fuel both liquid and solid real food and gels. Better to Have and Not Need than to Need and Not Have.
- Yesterday I did Bald(1 hour Z2 AT says Achievable) indoors light breakfast and 64grams liquid carbs, mandarine, 1/2 homemade energy bar Team Sky recipe and a back up SiS gel all in arms reach. @30 min mark mandarine energy bar consumed. Drinking every 10-15 minutes combo of water and energy drink. @40 minute mark I felt the onset of lack of fuel discomfort. Boom SIS gel discomfort gone finished workout.
- Today I did Walker (2hrs Z2 AT says it’s a Stretch) indoors. Fuel liquid and water, 1/2 homemade energy bar, banana. @ 1hr 20min all real food is gone about 2 large swigs of energy drink left and I am starting to feel uncomfortable backup SIS gel was not replaced from yesterday
so I have to stop and go to the supply closet and get gels. Needed two SIS gels @7min to go that uncomfortable feeling coming back again… but I decided just to gut it out cause I did not want see anymore downward blips on my Z2 power profile that would eventually make it STRAVA

So the point is I come to the Forum see this thread and think about my situation. As mentioned it’s all different for each individual but After Further Review… I came into both workouts with my glycogen stores too low… I had been playing around with fasting not for cycling but longevity(thank you David Sinclair) and was trying to reach autophagy…and while I did I did NOT have sufficient fuel intake for the pre workout fuelling…
So there are a lot of factors that can affect what happens to your system… Anyways I just wanted to share my 2 cents.
A good book if you’re still into books is “Advanced Sports Nutrition” Benardot…The 7 day pre race taper is awesome…
Good Luck and Keep the Rubberside Down
