Join Date: Oct 2009
Location: Further North than U
Bikes: Spec Roubaix, three Fisher Montare, two Pugs
my best advice is to add some significant hard push to each ride so as to stress yourself a bit, which is the basis for your body adapting by getting more fit. It might be riding longer, or riding harder. If you do the same 20mi ride, toward the end of the ride try a few sprints for a minute long, as hard as you can with recovery time in between. If you're coming home really tired it may be due to the fact you are already pushing yourself, which is good, but it could also be due to being dehydrated or not starting out with enough fuel in you. Be sure you're plenty hydrated before you leave and drink/snack a bit along the way to ensure you're not running low on energy. When I first got back to biking a 30mi ride really required me to drink a full bottle of water and have some snack along the way. Now, not nearly so much. Just keep it up and you'll continue to adapt and get stronger but do take care to not overdo it. That may be worse than the alternative.