Originally Posted by
Planemaker
Can the lack of electrolyte replacement during the ride account for this?
Yes. It may not be the only reason, but it can be a big problem.
Before long rides, I'll weigh myself both pre and post ride. If I get the hydration right, the post-ride weight will be close to the pre-ride weight. Getting it wrong can lead to fatigue and low energy. During my first year back on the bike, the difference between pre/post frequently reached 5 lbs.... not good. I've learned to hydrate more which has helped on my longer rides. Also, you need electrolytes, not just water, especially if the rides are longer then an hour. I don't like the sugary drinks, they just get to sweet on long rides, and supported rides with extra cookies and such makes sweet drinks even worse. I'm using Nuun right now, the amount of electrolytes falls around the middle when compared to other products.
Also, pushing hard over consecutive days without enough recovery (food, time or both) will also lead to reduce performance.