jgs said:Helloe to the group,
Question;does anyone think it is possible to train for a long race like
the Vermont50 (the 50K) by biking and running? It would be great to use
cycling to train durning the week and to use the week-end for runs and
longer runs. I would like to try to avoid overuse injuries to me feet
and other body parts by mixing up the running and cycling.
Thanks,
/john
BTW - I am a dedicated trail runner and XC skier. My week-end trail
runs right now are about 10-12 miles of single track. Mid-week runs are
5-8 miles until the days get to short.
I ride the roads and run the trails.
Thanks to the group.
I predict that you will hear several differing opinions on this topic. For what
it's worth, here's mine.
First, a bit about my background -- I mostly race 1 mile-10k though I have
competed in half marathons (4 of them) and a marathon.
My take on this is that specificity counts. For this reason, I run about 80
miles a week for a few consecutive months prior to peaking, and average about
60 year round.
In terms of overuse injuries, the leading cause of injury among myself, people
I train with, and people who post on this newsgroup, is trying to run too fast--
overdoing speed work, overracing, hammering speed work without an adequate base,
etc. The only notable exception to this is that female runners are vulnerable to
stress fractures which can be partly caused by excessive training volume (though
there are other factors too), especially on hard surfaces (but also sudden
increases). So, if you run slowly on trails, and don't rapidly increase your
mileage, you probably shouldn't be too worried unless you have some prior
experience with injury that you are trying to avoid repeating.
I have seen plenty of evidence to support specificity, both anecdotal and
published. In terms of anecdotal evidence, I personally know some very
well trained cyclists who take up running, and make rapid performance gains
much like any new runner. So it seems that the peripheral adaptions make up
a substantial part of performance. I also know someone who cycles and runs only
minimal mileage (<1000 miles/year), and he races very well up to half-marathon,
but failed to finish the marathon last year. I also know from personal
experience that simply adding more mileage has substantially improved my own
times, even at shorter distances.
In terms of published evidence, the gains that one achieves with mileage are
highly specific. These include cell-level adaptions, which really need to occur
in the right head of the right muscle to be useful. The adaptions are highly
local and specific. Other possible adaptions such as increased neural efficiency
which one can gain by doing frequent strides, are obviously specific -- trying
to get these benefits from cycling is like trying to learn piano by practising
trumpet.
So, I think you're just selling yourself short if you try to use cycling as a
*substitute* for running. Think of it as a "supplement* instead. In particular,
if your training program looks woefully inadequate without the cycling
component, then it is woefully inadequate, period. But if you're using cycling
as a way to give your training volume a bit of a boost, then that's reasonable.
My rule of thumb is that I try to get in about 10hrs of training a week. If
there's some reason I simply *can't* run that much, I bridge the gap with
cross training. (for example, if I'm coming off a layoff, I can't just dive
into 70 miles per week. I need to build back up)
Cheers,
--
Donovan Rebbechi
http://pegasus.rutgers.edu/~elflord/