Live blogging from ” Pacing Strategy: A Window in the Experience of Fatigue” at ACSM!


Packed room, let’s hope I can stay awake after lunch!

1:07 “To understand pacing, you must understand pacing failure.”

1:11 New term to me, “fatigue-ogens.”

1:12 Cool, talking about exercise regulation through anticipation and feedback. Mixture of mind, body, and experience. Guess this is why that last minute always sucks, no matter the distance.

1:15 Cool. Showing data that interval exertion, in watts, was associated directly with expected rest period. Smaller rest interval was associated with less power even though subjects were instructed to exert at maximum.

1:18 Got onto thermoregulation and pacing in hot conditions. Showing data relating decreased performance in higher heat. No surprise there. What is interesting is that test subjects were not limited by core temperature, meaning subjects paced lower in the heat due to mental anticipation.

1:26 Wow. Talking about a study by Walton et al that compared cycling watts between riders on placebo and riders on Wellbutrin. Wellbutrin group had higher watts even though their perceived exertion was not different than the placebo group. Argues again for a central neurological component to pacing and performance.

1:29 Now discussing a study by Castle and et al. They told athletes that there core body temperature was lower than it actually was. Found those athletes that they deceived had better performance than the control group. I guess you always believe whatever someone tells you if there holding a rectal thermometer.

1:32 Changing speakers now, talking about the afferent feedback from muscles. ie, the burn. Is there a link between peripheral receptors and central mechanisms for regulation of performance.

1:41 Showing some fascinating research. They basically exercised a right leg via knee extensions until limit. Then within seconds, started exercising the left leg. Found that even though left leg was fresh, subjects couldnt exercise their left leg to the pretested limit. Hypothesis is that the central motor drive limits further fatigue.

1:50 Moving onward! Now something called “Experimental Manipulation of Feedback.” YIKES.

1:56 More about that Bupropion study. Don’t you guys and gals go out and start asking me for Wellbutrin. Also showing data about improved performance with Ritalin. Again, all this info is supporting the importance of central regulation of performance.

1:59 LOL. Talking about a study in which rats were run to exhaustion. Damn rodents ran for 300 minutes!

2:11 Moving onto actual pacing strategies.

2:13 Neat. RPE + Distance to go = HAZARD SCORE??

2:15 Fascinating, showing Olympic paces in races. Everyone starts fast, slows, then builds back up at the end.

2:18 So basically, a a higher hazard score equals less ability to hold pace? This is also a bit thick guys. I will have to find the paper and post it.


About Ironvan

From couch potato to Ironman triathlete in 2 years.

Posted on June 3, 2011, in Uncategorized and tagged , . Bookmark the permalink. Leave a comment.

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