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what causes back pain and a burning a$$? bike fit help

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Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

what causes back pain and a burning a$$? bike fit help

Old 08-20-10, 12:04 AM
  #1  
chadwebster
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what causes back pain and a burning a$$? bike fit help

laugh at the title if you must, but when im doing any decent milage my lower back hurts and my ass gets all lactic acidy(before i might think it should) is my seat most to low? high? whats up?, btw, back does not hurt when walking around or anything so i know its more of a bike fit issue than my body.
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Old 08-20-10, 12:17 AM
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how long you own the current bike and how long you been riding?

it could be the fit(get a pro fit) or it could be just you(getting use to the road bike position)

most folks get more flexible and comfortable as they rack up the miles
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Old 08-20-10, 12:53 AM
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Post photos of you on the bike and BF will fit you better than a pro. Trust me.
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Old 08-20-10, 02:23 AM
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I think I will laugh at the title, my response to it is: A long night in jail.

Seriously though, do you mean you are sore from the seat.......or your glutes are sore from pedaling?
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Old 08-20-10, 04:49 AM
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Originally Posted by chadwebster View Post
laugh at the title if you must, but when im doing any decent milage my lower back hurts and my ass gets all lactic acidy(before i might think it should) is my seat most to low? high? whats up?, btw, back does not hurt when walking around or anything so i know its more of a bike fit issue than my body.
You answered your own question. Now get some help.
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Old 08-20-10, 05:21 AM
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Are you wearing cycling shorts? Those tend to help quite a bit with sore ass.
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Old 08-20-10, 07:17 AM
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Lactic acidy a$$. Stop riding now! People have died from that. You can look it up.
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Old 08-20-10, 12:52 PM
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yes im wearing cycling shorts but i just got them a little while ago
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Old 08-20-10, 02:52 PM
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Try putting a seat on the post. Most find it less stressful. I get acidic just thinking about it as an application method for chamois butter.

Sorry.


Barring rough roads it appears that you are too elongated toward either the pedals or the bar. Do you shift consistently to seek relief in either direction? Another, and more common than you would think, reason could be a discrepancy in length of your legs or arms creating a lopsided position. Once again sorry about the starting comment.

Last edited by miyata man; 08-20-10 at 02:58 PM. Reason: snark
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Old 08-20-10, 02:59 PM
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...that may not be lactic acid coming out of your ass! Wait...I looked it up, that is definitely NOT lactic acid coming out of your ass. Talk to your proctologist or avoid your nocturnal activities before riding in the morning.
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Old 08-20-10, 03:12 PM
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Originally Posted by 96WX3 View Post
I think I will laugh at the title, my response to it is: A long night in jail.

Seriously though, do you mean you are sore from the seat.......or your glutes are sore from pedaling?

+2
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Old 08-20-10, 03:14 PM
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Originally Posted by chadwebster View Post
laugh at the title if you must
You can say ass
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Old 08-20-10, 04:10 PM
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To answer your question:

Back Pain
Riding in the drops for long periods of time and not being accustomed to doing that on a road bike.
Riding a road bike for long periods of time in any position and not being accustomed to it.
Not professionally fitted (wrong frame size, stem size, spacers, saddle height, bar angle, etc.)

Ass Pain
Not enough miles on the saddle (many have to break in)
Not enough miles on your ass (if you're not experiencing numbness this is likely the cause)
Not professionally fitted (if you're not fitted properly you might have an improper amount of weight distributed on your ass)
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Old 08-20-10, 04:46 PM
  #14  
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Originally Posted by 96WX3 View Post
Seriously though, do you mean you are sore from the seat.......or your glutes are sore from pedaling?
+1
Good point!
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Old 08-20-10, 05:33 PM
  #15  
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96x3, good one haha, im not gonna ask how you know that, never mind i will, first hand experience pehaps?
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Old 08-20-10, 09:40 PM
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I will try not to be tongue in cheek--okay I guess it's impossible.
I just had a bike fit recently and the shop had, what they referred to jokingly as, an "ass-o-meter." It was basically some memory-foam attached to a board with measurements in mm. It measures how far apart your sit bones are, thus giving them a better idea of what seat will take the pressure away from ... refer to any of the other remarks made above. So although I am only very slightly larger than the average North American male (arguably) at 180lbs and a 34 inch waist, I ended up with a 155 mm saddle instead of the 130mm saddle that I bought a few years ago when I switched to road: the popular thinking being skinny, hard seat means more serious riding. It has made a serious difference in how long I remain comfortable on the bike, and it does not hinder my legs. This was at a shop that had Specialized BG Fit. I don't know if other (serious) shops have something similar, but it's definitely worth looking in to (insert ass joke here).
Obviously, as stated above, there are many other reasons you may be uncomfortable, but(t) check it out.
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Old 09-09-10, 11:26 AM
  #17  
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This thread begs for some immaturity, but I was actually searching for others with sore asses because mine is sore right now from riding hard last night (wow, I can't believe I just said that). In my case, it's not bike fit, seat comfort, shorts, or anything like that (at least as far as I know). My ass is sore because I must use my glutes like crazy when pedaling. It's more of a nuisance than a serious issue, as I can still ride fine. Mostly annoying when I go to sit on the crapper or in a hard chair.

Sometimes, LT hits me in the ass before anything else. It's usually when I'm climbing steep hills repetitively, but also when I'm LTing it on flats, particularly in the drops. And yes, I stretch them before, during, and after a ride, then before bed.

I guess it could be either a good or bad thing. I may have many cycling weaknesses, but lacking leg strength I am not, so I can't see it being because my legs aren't doing as much as they should and my glutes are taking up the slack. I kind of see it as I'm more effectively working my entire body.

Another area that sometimes gets sore after pushing hard is my groin (Uh oh, here come the comments...). I'm probably the only dude that occasionally LTs in my ass and groin.

As far as my back, the muscles in my lower back will start to ache a little when off the saddle hard pedaling for extended periods of time (1+ miles). Again, I think it's me utilizing all my muscles and some of them aren't as strong as my legs.
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Old 09-09-10, 11:46 AM
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What's the big deal with "profesional fits" & so many recommendations to get one? I really don't get it, it's just not that hard to correctly size a bike for yourself, especially with the glut of information you can get from the www.

Sometimes a greenhorn just needs some time in the saddle too. But pains in these areas eventually hit everyone, given enough hours riding.
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Old 09-09-10, 11:52 AM
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wipe better
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Old 09-09-10, 04:31 PM
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Originally Posted by chadwebster View Post
laugh at the title if you must, but when im doing any decent milage my lower back hurts and my ass gets all lactic acidy(before i might think it should) is my seat most to low? high? whats up?, btw, back does not hurt when walking around or anything so i know its more of a bike fit issue than my body.
optimizing position might help some, but... (just had to.... )

conditioning...

this chart showing muscle usage thru the pedal stroke, https://www.cyclingforums.com/cycling...used-ride.html (about 1/2 way down page...) , has been around for ages, sure it's here on BF also, but too much trouble to find at the moment.
course this changes slightly depending on position - TT vs road vs track - and individual muscle balance.
there is some great oldtime humor about trainers & soigneurs commenting about the early season riding 'form' of euro pros, based on the development state of their gluts...
mostly pyscho/sick bikie stuff, but funny.

stop reachin for that soap...
stop whinin, go ride

Last edited by cyclezen; 09-09-10 at 04:36 PM.
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Old 09-09-10, 04:54 PM
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My lower back hurts sometimes too, but I think it's because I'm not used to my 8-10cm saddle-bar drop.
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Old 09-09-10, 06:48 PM
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Originally Posted by Pilsley View Post
What's the big deal with "profesional fits" & so many recommendations to get one? I really don't get it, it's just not that hard to correctly size a bike for yourself, especially with the glut of information you can get from the www.

Sometimes a greenhorn just needs some time in the saddle too. But pains in these areas eventually hit everyone, given enough hours riding.
i was thinking the same thing, its just a freeking bike. theres only a small handfull of adjustments to make. just watch some bike fit vids on u tube. to me this would be like a guitar player who cant figure out how to set up his own guitar. if your going to spend any time on a road bike and can screw in a light bulb than maybe you should be able to fit your own bike. you really only need a plumbob and a miror. i think every one on this forum works as a bike fitter or something.
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Old 09-09-10, 06:49 PM
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Originally Posted by bikerbob2 View Post
i was thinking the same thing, its just a freeking bike. theres only a small handfull of adjustments to make. just watch some bike fit vids on u tube. to me this would be like a guitar player who cant figure out how to set up his own guitar. if your going to spend any time on a road bike and can screw in a light bulb than maybe you should be able to fit your own bike. you really only need a plumbob and a miror. i think every one on this forum works as a bike fitter or something.
:facepalm:

Edit: I posted this for another thread about fitting:

"That's great that you were able to figure all that out on your own. Not every does, and they work themselves into uncomfortable positions and don't know why or what to adjust to fix it, or sometimes make it worse. If it were that easy, there wouldn't be so many "check my fit" or "fit advice" threads on BF.

If you are comfortable on the bike, have no pain, numbness or other "issues", and are happy with your performance, then there isn't much reason to pay someone for a fit. If there is some area you think could be improved, then a fit may be worth it to eek out some more comfort or performance. You can go beyond "the guy at the shop" and look into some of the dynamic fitting systems like Retul, etc."

For what it's worth, I'm not a fitter, and I have no financial incentive to "push" getting a fit. I myself have never paid a fitter or had anything other than a quick measurement transfer and check between bikes when I bought my TCR. I have evolved my own position and quite happy with it, but I understand that not everyone is able to understand the interplay of the adjustments and the affects that they have.

Last edited by umd; 09-09-10 at 06:55 PM.
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Old 09-09-10, 09:09 PM
  #24  
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I just moved up to a bigger tire in the back, 25mm. It helped out on the longer rides.
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Old 09-10-10, 05:05 AM
  #25  
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Describe the saddle.

1. Is it wide enough for you?

2. Is it a very flat saddle?


I cannot ride a flat saddle because it gives me horrible lower back pain and tailbone pain. I need a saddle that curves up in the back for my lower back to be comfortable.

Why? I'm not sure ... perhaps the curved saddle offers more support. But I have tried flat saddles on several occasions and they just simply do not work for me. Maybe you are experiencing the same thing??
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