Originally posted by jobob
[Some of the stuff I've read implies that it's a symptom of over-training, and as I gain fitness it might go away. I don't *think* I'm overdoing it right now, I go out for about 10 miles ~ 3 mornings per week and do longer rides (20 to 30 miles at the moment) on the weekends. I try to push myself a bit, but certainly not to exhaustion. Anyhow, I'll pay more attention to what I'm doing and make sure I'm eating right.

I [/B]
For what it's worth, I found this on the net.

http://www.bodybuilding.com/fun/ammonia.htm

Also, overtraining doesn't necessarily directly correlate to the amount of pure exercise that we do. If we aren't eating right, sleeping enough, or have too much stress in our life, just a 'moderate' amount of physical activity might kick us into overtraining because we aren't really resting and recuperating between sessions.