Fetal training regimens

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My new Sweat Science columns are being published at www.outsideonline.com/sweatscience. Also check out my new book, THE EXPLORER'S GENE: Why We Seek Big Challenges, New Flavors, and the Blank Spots on the Map, published in March 2025.

- Alex Hutchinson (@sweatscience)

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Over the last few years, there have been a bunch of articles with titles like “Marathon moms raise the post-natal bar,” charting changing attitudes about exercise during pregnancy. In general, the information provided is anecdotal — after all, there are understandly strict limits on what regimens you can inflict on pregnant women in the name of science. So it’s interesting to see this study, presented by researchers from the Kansas City University of Medicine and Biosciences at the annual meeting of the American Physiological Society.

The researchers were aiming to see whether maternal exercise improves the cardiovascular health of the fetus, with the “exercise” group performing moderate intensity aerobic exercise for at least 30 minutes, three times per week. Sure enough, fetal heart rate was lower in the exercise group. Interestingly, the researchers also suggest that maternal exercise could help the development of the autonomic nervous system. This part is less clear to me — but perhaps it’s a topic that’s worth digging into a little more deeply. Certainly, it’s encouraging to see some hard data emerging in a very hard-to-study area.

Jockology: compression garments

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My new Sweat Science columns are being published at www.outsideonline.com/sweatscience. Also check out my new book, THE EXPLORER'S GENE: Why We Seek Big Challenges, New Flavors, and the Blank Spots on the Map, published in March 2025.

- Alex Hutchinson (@sweatscience)

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This week’s Jockology column on compression garments is now up on the Globe site. I’ll be interested to see what people think, because it covers a lot of ground. The science behind compression socks is very different from the science behind compression shorts — not to mention Allen Iverson’s compression arm sleeve, and the full-body compression suits that companies like Skins are hyping — so it’s hard to generalize about whether compression garments in general work.

I was pretty skeptical when I started researching this column, but I uncovered a lot more research than I expected — and I also heard some pretty ringing endorsements from, among others, William Kraemer, one of the very big names in sports research. On the other hand, given the impossible-to-blind nature of compression garments, I can’t quite shake my worries that it’s all a big placebo. Anyone have personal experience with this stuff?

Future tech: read on the treadmill with “stabilized text”

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My new Sweat Science columns are being published at www.outsideonline.com/sweatscience. Also check out my new book, THE EXPLORER'S GENE: Why We Seek Big Challenges, New Flavors, and the Blank Spots on the Map, published in March 2025.

- Alex Hutchinson (@sweatscience)

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treadmill-readingThere’s a big conference on human-computer interaction going on in Boston right now. Not a hotbed of sports-related research, but I noticed this fantastic research project from Purdue University’s Healthcare and Information Visualization Engineering (HIVE) Lab:

ReadingMate: An Infrared-Camera-Based Content Stabilization Technique to Help Joggers Read While Running on a Treadmill.”

The contraption monitors the bobbing of your head, and makes the text that you’re trying to read bob up and down on a screen, so that it seems to you that it’s not moving at all. Seems unlikely, but… Continue reading “Future tech: read on the treadmill with “stabilized text””

How fast do I have to walk to get fit?

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My new Sweat Science columns are being published at www.outsideonline.com/sweatscience. Also check out my new book, THE EXPLORER'S GENE: Why We Seek Big Challenges, New Flavors, and the Blank Spots on the Map, published in March 2025.

- Alex Hutchinson (@sweatscience)

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To count as exercise, walking is supposed to reach a “moderate” level of intensity, where you use about three times as much energy as you would lying on the sofa popping Cheetos. So how fast is that? According to a study by researchers at San Diego State University, it’s between 92 and 102 steps per minute for men, and between 91 and 115 steps per minute for women.

That’s assuming, of course, that you live in a home with a picket fence, a dog, and 1.4 children. Still, even if you’re not perfectly average, the researchers are comfortable drawing general conclusions:

We believe that these data support a general recommendation of walking at more than 100 steps per minute on level terrain to meet the minimum of the moderate-intensity guideline. Because health benefits can be achieved with bouts of exercise lasting at least 10 minutes, a useful starting point is to try and accumulate 1000 steps in 10 minutes, before building up to 3000 steps in 30 minutes.

So if you’ve got a pedometer (and I have the impression that pedometers are the “random branded freebie” most in vogue these days), now you know what to do with it!

Does aerobic exercise make you instantly smarter?

THANK YOU FOR VISITING SWEATSCIENCE.COM!

My new Sweat Science columns are being published at www.outsideonline.com/sweatscience. Also check out my new book, THE EXPLORER'S GENE: Why We Seek Big Challenges, New Flavors, and the Blank Spots on the Map, published in March 2025.

- Alex Hutchinson (@sweatscience)

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It’s old news that exercise is good for the brain. Dan Peterson of 80percentmental does a nice job of summing up some of the benefits here: increasing blood flow to the brain, making new brain cells, managing glucose. We usually think of that in terms of long-term benefits — stay active to avoid losing your marbles.

That’s why a forthcoming study (now available online) in Medicine & Science in Sports & Exercise caught my attention. Continue reading “Does aerobic exercise make you instantly smarter?”