BIG BROTHER is being recruited to help people lose weight. Swiss scientists
have tested the ability of the Global Positioning System (GPS)—a network
of 24 navigation satellites orbiting the globe—to track people and gauge
how much exercise they’re clocking up.
The epidemic of obesity afflicting many Western countries has been blamed in
part on a lack of exercise, and doctors agree that taking more would improve
public health. But it’s not clear how much exercise people actually take, and
measuring it accurately has so far proved tricky.
Now Yves Schutz and his research group at the University of…
