Today while out on my usual second ride, I tried to go for higher cadences again- and something snapped. I used to have a consistent cadence of about 55-65 rpm, and 65 was about the highest I could keep pinned at for a long time. Going all out I could manage about 95 for less than ten seconds, and around 85-90 for 30 seconds before needing to slow down.

But today, I was able to do a high speed run at 110rpm for 15 seconds, 100rpm for 35 seconds, and was able to keep up a consistent and comfortable 70-75rpm for the rest of the ride.

I'm curious, is this a common thing? And more importantly is it likely to continue when I go out for a ride tommorow morning or just fade away again?

For background, I have been seriously riding every day (missing about one day every two weeks) for a month and a half now. Once for 45 minutes in the morning, and once for 45 minutes at dusk. I never shift gears so I ride a de facto singlespeed, and generally ride as if it were a fixie (I rarely coast). My typical rpm for the entire 1 1/2 months was at most 65. In terms of nutrition I usually eat a meal before riding and try to make sure it has a decent balance to it. I occasionally take a glucose tablet (though I'm not diabetic) before riding. My water consumption is usually 1/2 litre every 45 minutes.

Thanks.