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  1. #1
    puppy mangler
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    Fixed Gears aren't bad for your knees

    People keep saying fixies are bad for your knees, but that is only if you don't have brakes right?
    I could see constant hard skidding as bad for your knees, but if you have front brakes, and back pedal under 10 miles, and use your brake to slow down in emergencies etc etc, how could it be bad for your knees?

    So, they aren't, as long as you don't skid too much and back pedal at greater speeds right?

  2. #2
    Senior Member filtersweep's Avatar
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    Pushing 90+ gear inches up a massive hill isn't exactly knee-friendly--- but I believe the hype about riding fixed to be bad for knees is largely BS. I would imagine if you were riding clipless with cleats that were clearly out of alignment, it would not be a pleasant situation. But even skidding isn't bad for knees if you are doing it right.

  3. #3
    Double Agent Astronomical's Avatar
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    From what I have heard, any resisting is bad for your knees.

  4. #4
    Beausage is Beautiful Fugazi Dave's Avatar
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    Resisting is the same as pressure from pushing down. Yanking up hard may be a different story, as I don't see how that's something nature anticipated in your joint design.

    Riding a reasonable gear, riding fixed gear is NOT bad for your knees. ****, my knees got much better after I started riding fixed.

  5. #5
    沒有腳踏車的居民 PluperfectArson's Avatar
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    It also comes down to fit and setup as well.

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    . bbattle's Avatar
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    Use brakes.

  7. #7
    AEO
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    Quote Originally Posted by Fugazi Dave View Post
    Resisting is the same as pressure from pushing down. Yanking up hard may be a different story, as I don't see how that's something nature anticipated in your joint design.

    Riding a reasonable gear, riding fixed gear is NOT bad for your knees. ****, my knees got much better after I started riding fixed.
    from the increase in muscle strength around the knee I bet.
    Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
    http://sanfrancisco.ibtimes.com/arti...ger-photos.htm

  8. #8
    Senior Member Brig's Avatar
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    I agree, skateboarding for 6 years in my late teens....that was bad for my knees. I can't really do any running sports but riding SS MTB and Fixed Road have no effect. I ride 48-17 fixed and 34-16 MTB. I can't say that I never have knee pain, but it's rare. This is without a brake, city riding (relatively flat).

  9. #9
    Live without dead time
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    Quote Originally Posted by Fugazi Dave View Post
    Resisting is the same as pressure from pushing down.
    Not at all. Concentric and Eccentric muscle contractions are two different things.
    Rich

  10. #10
    Yo!
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    I don't feel like riding fixed does anything too harmful to my knees.

    I run 77.8" and skid a lot and have never felt any sort of discomfort. In fact, I'd say hard resisting over skipping or a smooth controlled skid is much more high impact on the knees.

  11. #11
    Beausage is Beautiful Fugazi Dave's Avatar
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    Quote Originally Posted by elTwitcho View Post
    Not at all. Concentric and Eccentric muscle contractions are two different things.
    Pushing down on the front side of the pedal stroke to go forward and pushing down on the back side of the pedal stroke to slow down are effectively the same.

  12. #12
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    Quote Originally Posted by Fugazi Dave View Post
    Pushing down on the front side of the pedal stroke to go forward and pushing down on the back side of the pedal stroke to slow down are effectively the same.
    No, they aren't. Concentric and Eccentric muscle contractions are not effectively the same. That's why they have different names and definitions.
    Rich

  13. #13
    Beausage is Beautiful Fugazi Dave's Avatar
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    So a minor change in angle at my knee changes completely the effect on my leg muscles? Same muscles are pushing down either way. Prove to me it's bad for my knees.

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    Live without dead time
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    Quote Originally Posted by Fugazi Dave View Post
    So a minor change in angle at my knee changes completely the effect on my leg muscles? Same muscles are pushing down either way. Prove to me it's bad for my knees.
    Wow. Dude...

    You can't see a difference between PUSHING and RESISTING? Seriously?

    And who said anything about being bad for your knees? Why would I have to prove that to you?
    Rich

  15. #15
    Comanche Racing PedallingATX's Avatar
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    I don't think it's good for your knees...

    Skidding isn't that bad, it's resisting you have to watch out for. Resisting the pedals is the most harmful thing that most fixed gear riders do. I did it a lot at first, and then my knees started to hurt. Now I just skip/skid, and they don't hurt that bad.

    Anyways, OP, bottom line is that noone here is a doctor (unless they are, but I doubt it). If you want a TRUE answer, ask a doctor, preferrably a sports doctor. Or you can listen to the rest of us-- who's knowledge on this topic extends to our 9th grade biology class...
    skinnytire

  16. #16
    Beausage is Beautiful Fugazi Dave's Avatar
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    re: knees, that's kind of the point of the thread.

    ANYWAY, Whether I'm going or slowing, I'm actively PUSHING on the pedals. I'm not resisting on the backside, I'm pushing against it.

  17. #17
    Live without dead time
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    Quote Originally Posted by Fugazi Dave View Post
    re: knees, that's kind of the point of the thread.

    ANYWAY, Whether I'm going or slowing, I'm actively PUSHING on the pedals. I'm not resisting on the backside, I'm pushing against it.
    Forgive me if I'm getting frustrated, it's early in the morning and I hate monday.

    That said, no you are not pushing on the backside of the stroke. If you were doing that, you would instantly switch from going forwards to backwards. You are RESISTING on the pedals, as you are exerting force against the pedals and the pedals are pushing your leg into flexion, not the other way around. The pedals are pushing your leg, and you are exerting force in the OPPOSITE direction that your legs are moving.

    For the third time, I've already told you the answer to this discussion. Eccentric and Concentric muscle contractions are two different actions. Go to wikipedia, that's your answer right there.
    Rich

  18. #18
    Beausage is Beautiful Fugazi Dave's Avatar
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    OK FINE. Go do your morning thing. Have another muffin or something.

    EDIT: and if it makes you feel any better, I have food poisoning and had to teach today (I'm on vacation) because another teacher went AWOL

  19. #19
    K2ProFlex baby! ilikebikes's Avatar
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    Quote Originally Posted by databike View Post
    People keep saying fixies are bad for your knees, but that is only if you don't have brakes right?
    I could see constant hard skidding as bad for your knees, but if you have front brakes, and back pedal under 10 miles, and use your brake to slow down in emergencies etc etc, how could it be bad for your knees?

    So, they aren't, as long as you don't skid too much and back pedal at greater speeds right?


    Running can be bad for your knees, and thats a natural thing, so why not riding fixed?
    You see, their morals, their code...it's a bad joke, dropped at the first sign of trouble. They're only as good as the world allows them to be. I'll show you. When the chips are down, these...These "civilized" people...they'll eat each other. See, I'm not a monster. I'm just ahead of the curve

  20. #20
    Senior Member seau grateau's Avatar
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    Don't ride a bike. Exercise is bad for you.

  21. #21
    its that damned rap music oneangrytoast's Avatar
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    i have had bad knees for 10+ years. i feel it all the time. when i first get on the bike i can feel it more, but im not sure thats a fixed thing or a bike thing. my knees dont take kindly to many activities, but i push on.

    pushing down on the upswing of the pedals to slow down def feels ****ty tho.
    -bread for destruction-


    Quote Originally Posted by Thetank View Post
    any way you can prove this or did you pull this out of your @$$?

  22. #22
    aNYthing MysticRats's Avatar
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    I think fixed gear riding def puts more stress on legs/knees than regular(free) riding.
    Wether knee problems arise because of it...I think there are alot of factors which will
    affect individuals diffrently.
    Maybe we should start a poll of Riders that have been riding fixed for over 5+ years and see where their knees are at?

  23. #23
    Gentlemen. ADSR's Avatar
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    FOOOOOD FIIIIIGHT!!!~~!
    The bums will always lose.

  24. #24
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    I raced track for years and trust me riding fixed on the street with no brakes can be bad for your knees, especially if you have an existing injury.

    But hey, you guys are young & new at it and won't feel it yet so don't worry about it.

  25. #25
    Double Agent Astronomical's Avatar
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    don't walk down steps guys, that **** will kill you in time.

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