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Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

Sudden drop in power?

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Old 02-17-10, 03:17 PM
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Sudden drop in power?

I was having a great ride today when my power suddenly dipped and it felt like I was pushing a bike with a flat. I ate an hour before hand and drank plenty of water...any explanations?
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Old 02-17-10, 03:19 PM
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Brake pad rubbing the rim ?
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Old 02-17-10, 03:20 PM
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Nope checked that too. I don't understand what happened...I looked at the log from my Garmin just now and I was in Zone 4 for the majority of the ride. I'm pretty confused as to what happened...
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Old 02-17-10, 03:42 PM
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How do you know your power actually dropped?
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Old 02-17-10, 03:46 PM
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It can happen....
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Old 02-17-10, 03:54 PM
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Bonk.
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Old 02-17-10, 03:59 PM
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You drank too much water, ate too much food.

Power-Bodyweight ratio all over the place. I have better results riding on a empty stomach.
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Old 02-17-10, 04:39 PM
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Your engine needs a valve and ring job.
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Old 02-17-10, 04:46 PM
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Some times stuff just happens.
I would suggest that you keep track of what, when, and how much you eat and drink, before and during and after a ride of any distance and note how you feel in a log. You could find you are allergic to something you are eating, or just eating to much of something. Keep track of your BM"s too. If you are not regular, find out why. Good luck.
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Old 02-17-10, 05:53 PM
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Agreed. Bonk (no carbs), fatigue, overheating or dehydration. I hit that point after 4 hours last sunday. Wanted to go another hour and a half and finish the century but it would have been painful and 10-15% less power so I passed. If you added it up it was probably too little carbs, you were just done, got too hot or didn't absorb enough water which can happen if you guzzle when you're thirsty because by then it's too late.

The other thing it could be, since you're tracking power, is you burned too many matches. That being staying too long over your FTP without enough recovery. It sucks because the power just falls at least 10%. Don't really know in your case, hope you find out.
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Old 02-17-10, 07:18 PM
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Well, I don't track power with a meter or anything, I just figured my power slipped because I struggled to go up hills I have easily conquered before.

I think my problem was I didn't drink enough water in the beginning of the ride, and when it really warmed up and I was cycling into a headwind, my body crapped out.
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Old 02-17-10, 07:29 PM
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Originally Posted by Sapience
Well, I don't track power with a meter or anything, I just figured my power slipped because I struggled to go up hills I have easily conquered before.

I think my problem was I didn't drink enough water in the beginning of the ride, and when it really warmed up and I was cycling into a headwind, my body crapped out.
Yeah I figured it just felt like you lost power and not that you actually measured a loss in power. It could have been dehydration, cardiac drift, tired/fatigued from the ride or stress in general, your tires could have been low, or you had a headwind, etc. There are lots of reasons that you could have had lower power for the same HR, and also many reasons you could have just been slower or felt worse for the same power.
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Old 02-17-10, 07:34 PM
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Check your heart rate in the morning, make sure you aren't overtraining.
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