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Nutrition science question...maybe(5 posts)

Nutrition science question...maybeBike Mike
Sep 30, 2002 1:52 PM
Need some insight as to the "How Come" of this semi-scientific study.

Background: 38 year old fitness rider. Usually get out 3-5 days/week, 25-40 miles per ride. Medium build. Taurus. Like long walks in the park, puppies...oh wait, wrong post.

Anyway, here's the scenario:

Saturday I ate poorly (but enjoyed every minute of it!), including a fair bit of fat in my diet.

Sunday I rode my usual 30 mile route in normal time with a normal avg. speed and a slightly above-average HR via my HRM. It was a nice day and I felt okay.

After the ride I was, for some reason, starving the rest of the day and ate tons of protein and carbs, including a huge penne dinner.

This morning I rode the same route, cut a chunk of time off the ride, increased my avg. speed by 5% AND decreased my avg. HR by 7%, was almost never winded, and felt like I could ride all day long.

Here comes the question: Does/can diet have that much of an effect or was it just that I was having that mysterious "good day"? This seems to be a fairly scientific trial using the same route, same weather, same bike and rider, but dramatically different outcomes. What's the deal?

Thanks for your insights.
so many variablesDougSloan
Sep 30, 2002 2:28 PM
Not saying is was not diet, but it could have been so many other things, too:

*hydration
*sleep
*rest from prior rides
*wind
*motivation
*different gears used
*training cycle

Attempts to attribute a particularly good or bad performance to one factor is pretty tough, even in a thoughtful scientific study; doing so on your own, layered with our not knowing much about you, would be pretty high on the speculation scale.

As long as you ate something, I doubt diet would have that much to do with performance on a 30 mile ride.

Doug
You forgot biorythmsKerry
Sep 30, 2002 4:24 PM
Welcome to the Journal of Irreproducible Results. The chances that you could make this series of events happen again with the same outcome are slim to none. To quote the old song "When you're hot, you're hot!" and "When you're not, you're not!" Don't read too much into this. You had a good day, so enjoy it. Eat well and properly, and you'll have more good days, you just won't be able to control or predict them through diet. Bad days, you could easily get - eat nothing, drink beer all day for your calories, ride the next day and tell us about it.
Wait! Before you laugh at biorhythms...cory
Oct 1, 2002 7:49 AM
I DO NOT BELIEVE, OK? But a few months ago I came across a biorhythm calculator somebody gave me years ago, and while I was sitting around thinking I should go ride, I got out my old training logs and plotted some outstandingly good and bad rides against the biorhythms. No chance of self-fulfilling prophecy, because the rides happened years ago. I was surprised to find a pretty strong correlation between good rides and supposedly "high" spots in the physical part of the rhythms, and bad ones or give-ups with the low spots.
I'm drawing no conclusions from a dozen rides over four or five years, but there it is....
re: Nutrition science question...maybeRich_Racer
Oct 1, 2002 2:42 AM
As the other guys implied, good nutrition will increase the chances of you feeling good. It tends to be something that has long-term effects though so eating badly for one day is unlikely to matter much. Eat well for a month and you're more likely to feel good - but are still susceptible to the list of other variables (see above).

yours,

Rich.