Last summer there was a period of roughly 18-20 days of absoltuely gorgeous weather, so I rode every day. Some days were 3-3.5 hrs at around 18-19mph, others were around 2 hrs at 20-21 mph. I noticed that I was riding much better during the second half of this period than the first half. So for the last 17 days, I've been doing about the same thing on generally hilly terrain with 2-3 days on flatter stretches of road in semi-tt mode, and have found that my fitness has jumped remarkably from where it was before this stretch. Prior to this I had done about 1200 miles outdoors this year at around 4-5 days a week and was already making good progress, but I cant help but think that the extra riding and stress on my body has only made it stronger. Does this make sense? I haven't felt burnt out at all. Each day seems to get faster and faster. Does this make any sense? How long can I keep this up? I usually hit my best form around july/august. The races I really want to do well in come in early June and late July. Should I keep this up for another month, take a week off, and then start again for the second half of summer?