I recently hit a 1000 miles for my base period. I still have room to improve my aerobic capacity, so I'm going to continue my base rides for a while. However, I'm working in some rides over more rolling terrain, and I'm starting to feel it in my legs.
These aren't long climbs by any stretch, but I run into a number of steep grades in excess of 10% and sometimes 15%. I'm in the small ring and 25t cog clutching the top of my bar for dear life going up them, and once I crest them, I typically switch to the big ring and slide the chain across the cassette to the 15t or 13t cog on the way down. That kind of steep.
Now, I know what you're thinking. This isn't the kind of terrain you should be doing base mileage over, at least not you, gcasillo. I'd agree, but there isn't any real appreciable smooth, flat roads that aren't near town. That means traffic, and that is no fun to ride around in. Plus, I have to do several loops in order to get the mileage I'm looking for.
Anyhow, my legs are still "weak" today after a couple of good, long rides last Friday, Saturday, and Sunday. Friday was an easy day. Saturday was a little more intense. Sunday, I was still feeling it a little from Saturday, and my legs were outright beat by the time I got home. I've done this route before and recovered in short order. But this week, my legs just aren't all there yet.
I remember from my baseball days that early in the season, my arm would go through a kind of dead period where it wasn't necessarily sore, just weak. Does this sort of thing happen in a cyclist's legs. In particular the quads. Perhaps I'm putting too much strain on my legs in order to keep my lungs and HR from rocketing?