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10 April 2014 11:44 am ,
Vol. 344 ,
The Pyrenean ibex, an impressive mountain goat that lived in the central Pyrenees in Spain, went extinct in 2000. But a...
Tight budgets are forcing NASA to consider turning off one or more planetary science projects that have completed their...
Ebola is not a stranger to West Africa—an outbreak in the 1990s killed chimpanzees and sickened one researcher. But the...
In an as-yet-unpublished report, an international panel of geoscientists has concluded that a pair of deadly...
Tropical disease experts tried and failed before to eradicate yaws, a rare disfiguring disease of poor countries. Now,...
Since 2002, researchers have reported that agricultural communities in the hot and humid Pacific Coast of Central...
Balkan endemic kidney disease surfaced in the 1950s and for decades defied attempts to finger the cause. It occurred...
- 10 April 2014 11:44 am , Vol. 344 , #6180
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ScienceShot: Calorie Counters, Stand Tall
12 November 2010 11:18 am
How many French fries did that 3-mile stroll burn off? It depends on how tall you are. When walking the same distance, short people burn more calories per pound of body weight than do tall people, simply because they have to take more steps to get there. That may seem obvious, but now researchers have proven it by measuring the metabolism and biomechanics of 48 children and adults walking on a treadmill. At a comfortable pace, study participants all took steps that were three quarters as long as their height. They also burned the same amount of energy per pound per step; short people just had to take more steps to cover the same distance. The study, published today in the Journal of Experimental Biology, pulls height, weight, and distance together into a single simple equation that could make calorie-counting gizmos more accurate and help the military provision troops on extended marches.
See more ScienceShots.