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-   -   Sudden fatigue? (https://www.bikeforums.net/road-cycling/897904-sudden-fatigue.html)

nhluhr 06-26-13 07:59 AM


Originally Posted by nahungry (Post 15783108)
Hello,
I've recently started biking regularly, about a month and a half ago.
Before, I was only biking on weekends on my hybrid and a bike that I bought on amazon that just looked like a road bike.
Since riding on regular basis, as a beginner, I didn't do anything significant; riding about 4 times a week, 20miles, avg of about 17mpg.
No considerable climbs(in Chicago) just stop and go type of riding.
I felt very comfortable doing the type of riding that I was doing and it was getting easier and easier, given how I felt after the rides, that I wanted to extend my rides by about 5~10miles per ride.
All of a sudden, about a week ago, I started having fatigue in the middle of the rides, usually at around 5miles into the ride and I have extremely hard time finishing even 20mile rides I was doing. Completely out of breath, thighs burning.
I can't seem to push harder in segments I was doing well due to the fatigue and I'm barely finishing the ride, let alone extending the distance.
Has anyone experienced something like this in their beginning days? How do I get over this? Its so sudden and too strange I have hard time thinking its just muscle fatigue build over a month or so. Thanks for your tip in advance.

Burning thighs pushes me to suggest you are pedaling too low of a cadence. Try this: next time you're pedaling in a way that feels normal, count how many times your right leg completes a circle in one minute. If it's below 90, you should consider pedaling faster in the next gear down for a given road speed. You're very new at cycling and riding what sounds like 100-120mi per week is a pretty aggressive start so it could be that you just need to let yourself recover for a few days and then start back slowly.

DocsDad 06-26-13 10:03 AM

Agreed, nutrition... especially prior to riding.

Also, I am not far from you and know that the humidity has really kicked up. This will have an effect, and I have noticed it. It gets easier as we get conditioned to it though.

nahungry 06-26-13 10:04 AM

Brakes are where it needs to be, seat post has dropped about 2cm. Tire pressure dropped to about 90psi.
In terms of cadence, I try to keep it around 90~99, where I feel the most comfort. Usually don't go into <85 unless on the climb for brief periods.

It has been getting quite windier and more humid lately. I guess I really never took that into consideration along with resting.
Rule #5 needs to apply as well (and number #10 perhaps?) ;). Riding solo doesn't do the trick as well as riding with someone else better I guess. There just doesn't seem to be too many group rides in Chicago which is surprising given the number of bikes and bikers in this city!
It looks like it's a combination of whole bunch of things. I will take a rest for a couple of days, rest, eat well, harden up and see how it goes :)
Thanks for all the pointers! really appreciate it!

GoHorhay 06-26-13 10:16 AM

I had this happen last week. I was panting, thighs were burning, and I was still in the tailwind portion of the ride (5-6 miles in). I felt awful and demoralized. Then I noticed the brake rub...

ThinLine 06-26-13 03:36 PM


Originally Posted by nahungry (Post 15783683)
Looks like I'll have to take a few days off and see how it goes. Thanks everyone

The new bike is a month and a half old. In red. Lol. It's a 2012 trek 2.3 The placebo effect must be wearing off sooner than later ;)

Trek 2.3 is a very nice bike, an aluminum Madone. Its called bonking, try a power bar (or protein) prior to a ride.

Makel 06-26-13 03:43 PM

Recovery and nutrition.

Banzai 06-26-13 03:45 PM

Do you ever take a rest week?

Recovery time is huge, especially if you've recently been on a run ramping up effort.

Banzai 06-26-13 03:49 PM


Originally Posted by nahungry (Post 15785191)
seat post has dropped about 2cm.

Woohoo, that's a big change. Did you have a compelling form/anatomical/fit reason for doing this? One CM is a mile when it comes to saddle height; I usually tell people to adjust no more than 6mm per ride in any direction, unless they know, for some reason, that they're grossly off. If you've dropped it too low, your thighs will absolutely burn because your position is bad. In fact, a saddle that's too low can sap 15-20% of your power, at a minimum.

nahungry 06-26-13 04:32 PM


Originally Posted by Banzai (Post 15786532)
Woohoo, that's a big change. Did you have a compelling form/anatomical/fit reason for doing this? One CM is a mile when it comes to saddle height; I usually tell people to adjust no more than 6mm per ride in any direction, unless they know, for some reason, that they're grossly off. If you've dropped it too low, your thighs will absolutely burn because your position is bad. In fact, a saddle that's too low can sap 15-20% of your power, at a minimum.

Apologies for the confusion.
I checked the settings on the bike and the seat has dropped 2cm from the original fitting that I had done when I first got the bike. Along with tire pressure dropping that is.
Must have been some of the bumps and potholes I hit.

jayp410 06-26-13 04:38 PM


Originally Posted by Banzai (Post 15786532)
Woohoo, that's a big change. Did you have a compelling form/anatomical/fit reason for doing this? One CM is a mile when it comes to saddle height; I usually tell people to adjust no more than 6mm per ride in any direction, unless they know, for some reason, that they're grossly off. If you've dropped it too low, your thighs will absolutely burn because your position is bad. In fact, a saddle that's too low can sap 15-20% of your power, at a minimum.

Yep. Not sure about the OP but in my case it was just a smooth seatpost that was hard to get tight enough, so it would gradually slip over several rides. The problem ended when I switched to a Thompson with its micro-ridges.

Also tires should be pumped before every ride, and brake clearance checked (after squeezing both levers).

shoota 06-26-13 05:16 PM

I seriously doubt he's bonking all of a sudden at five miles into a ride. I'm going with needing recovery time for sure.

bsektzer 06-26-13 05:49 PM

I think the point is we're all guessing. And mind you, they're mostly good guesses, some better than others, but guesses all. Since a medical cause cannot and should not be ruled out on a web forum, I'd suggest the OP go see his Doc. It's the "sudden" onset of this "fatigue" that makes me say this, along with a bit of personal history. In any case, a quick visit to the MD of choice should do no harm, and may reap significant benefit.

After all is cleared on that front, then start working with the previous suggestions.

nahungry 07-01-13 02:30 PM

Once again, thanks everyone for the input.
I took a few days off and rested, trying to eat healthy (trying that is, lol).
Typically, I bike right after work on empty stomach or even on weekends, with my mild superstition that any type of exercise is best done on empty stomach.
I went out for a ride this weekend, with sufficient amount of carbs about an hour before I went out with a bottle of sport drink in the bottle with ice, drinking promptly at every chance I get throughout the ride.
Turns out that I was able to not only finish my ride(30 mile run) without stop but average speed was up as well; 17.5 mph from my typical mid-16 mph over the same distance while taking 5 at the turn. Cooler weather probably helped as well.
Once again thanks for all the input and happy biking! :)


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