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Thread: Biking/Running

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    Biking/Running

    I had a question and hopefully someone has some insight. I run as well as bike (no triathlons or anything though), and I recently started to have a problem. I am currently training for a half marathon, and in the meantime I have continued biking (commuting, getting around the city) as always. The problem is, it seems when I run a day after biking, I am noticably slower - even when I only biked 5-10 miles. Does anyone know how biking and running affect each other in terms of muscle structure? Is this mental, or is biking really making my running more difficult?

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    Actually - you're probably dealing with fatigue rather than a muscular stress issue. You'll probably need to build up your aerobic fitness level. If you were monitoring with a heart rate gizmo, you'd probably see that you hadn't recovered fully by the next day.

    BTW - one of the reasons that tri bikes are different is that the geometry uses up the running muscles less than a standard road geometry.

    BTW#2 - I'm a tri newbie and I'm finding that doing more than one of the activities consecutively seems to have a multiplying affect on my level of fatigue.

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    It might be fatigue...it just seems strange since not biking I can go an average of 45 seconds faster per mile on a 5-7 mile run...

    I am also riding a track frame, so maybe that is not allowing the running muscles to rest as much as I thought

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    well I'm sure its not the case, since you probably rested up and checked your run time again, but did it get colder? Im sure cold air can slow your run time by a good amount.. It does for me. As for getting a slower run time other than that, the only other reason I can think of is fatigue, but 45 seconds is a lot..

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    Don't worry about it. Sure, the run/bike combo will be harder overall than doing one alone with less volume, but you'll be in better condition because of it. Triathletes encounter this all the time, and it's normal. I run a marathon at near 7min/mile, yet in a olympic distance triathlon, after biking hard for an hour, it's hard for me to get to that pace in a measly 10k (6 mile) run. Just go with it.
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    Senior Member Richard Cranium's Avatar
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    Is this mental, or is biking really making my running more difficult?
    Too bad, if it was all "mental" we'd just ignore it and ride like run like an Ironman.

    If your post is indeed true, you may be better off starting out by taking longer walks and only running every other workout. Endurance in two sports requires a very long time to develop.

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    Quote Originally Posted by Richard Cranium View Post
    Too bad, if it was all "mental" we'd just ignore it and ride like run like an Ironman.

    If your post is indeed true, you may be better off starting out by taking longer walks and only running every other workout. Endurance in two sports requires a very long time to develop.
    walking wouldn't really do much...I have done 20+ mile runs before, I am just out of shape compared to what I used to be. I am a runner who bikes for fun. I was just wondering if casual biking has a negative effect on running. I might just not give myself enough rest after my long run day...I am afraid I am 'cheating' on my running schedule with casual bike rides...

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    I also run and ride, but I do them both in the same workout. It feels to me that cycling uses more of the thigh/ham muscles and running uses the calf/lower leg muscles, but they both seem to work the hip/glute group. It may be that those specific muscles are fatigued with not enough rest time. It has taken me years to work up to a 2 mile run/ 20 mile ride. It might help if you were to work on some hip/glute specific exercises to try to stregthen that area.

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    Quote Originally Posted by hnsq View Post
    It might be fatigue...it just seems strange since not biking I can go an average of 45 seconds faster per mile on a 5-7 mile run...

    I am also riding a track frame, so maybe that is not allowing the running muscles to rest as much as I thought
    You're not rding a fixed gear are you?
    You're just trying to start an argument to show how smart you are.

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    Quote Originally Posted by StanSeven View Post
    You're not rding a fixed gear are you?
    right now yes...I am trying to buy a better bike, but money is tight. It just happened to be the cheapest bike I could find. I have been looking at Jamis Auroras, and after the new year that might be my present to myself.

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    Senior Member Richard Cranium's Avatar
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    I was just wondering if casual biking has a negative effect on running. I might just not give myself enough rest after my long run day...I am afraid I am 'cheating' on my running schedule with casual bike rides...
    There are two components to running performance. Muscular and cardiovascular "rest" is necessary for you to run without experiencing feelings of fatigue.

    If you don't feel fresh when you run, and you are not riding hard enough to actually damage or otherwise fatigue your leg muscles, your feelings of fatigue are systemic.

    Maybe you're stressed out for some other reason - or you're just really out of shape.

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    Quote Originally Posted by Richard Cranium View Post
    There are two components to running performance. Muscular and cardiovascular "rest" is necessary for you to run without experiencing feelings of fatigue.

    If you don't feel fresh when you run, and you are not riding hard enough to actually damage or otherwise fatigue your leg muscles, your feelings of fatigue are systemic.

    Maybe you're stressed out for some other reason - or you're just really out of shape.
    Thanks for talking to me like I have never done anything athletic in my life...I have ran in races for years (it is pretty arrogant to say someone doesn't know what 'rest' is in respect to running). I am asking for help with the physiological effects of biking on long distance running. If you can't help with that, please don't post here again.

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    Quote Originally Posted by hnsq View Post
    right now yes...I am trying to buy a better bike, but money is tight. It just happened to be the cheapest bike I could find. I have been looking at Jamis Auroras, and after the new year that might be my present to myself.
    There's you answer. Fixed gear riding uses muscles differently that road biking, especially with braking. Road biking uses your mostly your quads while running uses hamstrings, glutes and calves. Fixed gear riding uses your hamstrings and glutes to slow you down/stopping. What happens is your legs are overly tired because the same muscles are used every day without enough recovery time in beyween
    You're just trying to start an argument to show how smart you are.

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    Stan, Ohno, thanks for the help...

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    Senior Member Richard Cranium's Avatar
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    Thanks for talking to me like I have never done anything athletic in my life
    If you don't understand what I've posted then just ask for more baby talk.

    My experience suggests that more often than not a "generalized" depletion of glycogen accounts for more experiential fatigue than specific muscularly generated metabolites or tissue damage when running on day after cycling. Of course I discount joint damage in making that statement.

    So you got ask yourself - are you stupid, or just don't what your I'm talking about? There are plenty of tri-guys that run and ride almost every day, ask them for stories about when they were just getting started.

    If all else fails grow up.

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    Quote Originally Posted by Richard Cranium View Post
    If you don't understand what I've posted then just ask for more baby talk.

    My experience suggests that more often than not a "generalized" depletion of glycogen accounts for more experiential fatigue than specific muscularly generated metabolites or tissue damage when running on day after cycling. Of course I discount joint damage in making that statement.

    So you got ask yourself - are you stupid, or just don't what your I'm talking about? There are plenty of tri-guys that run and ride almost every day, ask them for stories about when they were just getting started.

    If all else fails grow up.
    hey, at least you actually try to help instead of acking like an a**, right?

    I asked a very, very simple question and you post like I am a moron. Berating someone on an internet forum shouldn't give you any self-satisfaction.

    Either way, I am done with this thread. Thanks for the help (those who have helped)

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