Running out of energy after 10 miles

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  • SteveTries
    SteveTries Posts: 723 Member
    The other factor aligned to all this (and closely related to the question of how much other mileage are you doing in the week) is how are you eating in the days leading up to your long run?

    Whilst I'm reading comments in this thread that you shouldn't need nutrition during a HM run, I think that presupposes a body that is well fuelled when the run starts.

    For example, I know from experience that if I've been following a low-moderate carb, calorie deficit diet Sunday to Friday then I go do my long run on Saturday morning I start to struggle around the 16km mark in a way I just don't experience if I move that run to Sunday and eat at or above maintenance all day Saturday.
  • Turtle003
    Turtle003 Posts: 133 Member
    Very Good points about eating enough...I am trying to lose the last 10-15 lbs of weight (lost 50 so far) and I am eating about 1300 cals a day. I may need to increase my calories but I have a hard time wrapping my head around eating more when I still have some to lose!
  • heybales
    heybales Posts: 18,842 Member
    You are eating at 1300, AND eating back exercise calories, or just 1300?

    If just 1300, you are not eating enough, you are glucose depleted, and you are just increasing your chances of losing weight because of using up some muscle.

    So wonder you run out of energy.

    Better wrap your mind around it real fast if you want to do this smart and right and not just shoot yourself in the metabolism.

    You are probably losing slowly right now, not because of a personal choice because you heard slower is better, but because your body is under enough stress that it's going to slow everything down to save itself.

    Diet is a stress, long hard cardio is a stress, pounding is a stress - too many stresses is not good at all.

    Eat back all your exercise calories and see how much better your runs are. Oh, don't worry about it being in the same 24 hr day in case you do evening running, but at least before your next workout so carbs are topped off again.

    You don't need any mid-race fueling, you just need normal life fueling.
  • heybales
    heybales Posts: 18,842 Member
    Oh, as to the mid-run snacks, you must be at intense enough effort for it NOT to effect fat utilization.

    If going to slow, your carb snack can just ruin using fat for the endurance part, and you'll run through those carbs and rest even faster. Requiring yet another carb snack. Terrible cycle to be in.

    Near the bottom of this info.
    http://www.alanaragon.com/myths-under-the-microscope-part-2-false-hopes-for-fasted-cardio.html

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