This past summer, my first summer cycling, I had steadily increased volume and intensity and felt I peaked in July. Then it seemed everything got harder and my legs always felt fatigued. I was riding 3-5 days a week and never took off from riding more than 3 days in a row. In Nov. I took a 24 hr urine test to check my amino's and I was very low on over half of the essentials. I was also very low on magnesium. I took a week off the bike, and started supplementing my protein macro % with a protein powder, once a day when off the bike and twice on a ride day. I have since done very little on road training but lots on the rollers and my recovery feels better. In the spring I will do another test. Hopefully I didn't damage myself from August through October and lose any gains made. Looks like protein% might need to be higher for endurance athletes than some might suggest.