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24 April 2014 11:45 am ,
Vol. 344 ,
Major climate data sets have underestimated the rate of global warming in the last 15 years owing largely to poor data...
The tsetse fly is best known as the vector for the trypanosome parasites that cause sleeping sickness and a disease in...
The National Institutes of Health is revising its "two strikes" rule, which allowed researchers only one chance to...
By stabilizing the components of retromers, molecular complexes that act like recycling bins in cells, a recently...
Fossil fuels power modern society by generating heat, but much of that heat is wasted. Semiconductor devices called...
Researchers are gaining insights into what made Supertyphoon Haiyan so powerful and devastating through post-storm...
Millions around the world got a first-hand look at what it was like to be in Tacloban while it was pummeled by...
- 24 April 2014 11:45 am , Vol. 344 , #6182
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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.