<http://schema.org/articleBody>
"OK, so what do you think is going on in this pic that Hilary Duff recently tweeted? Just a little healthy competition @whitneyacummings @brb082985 thought I could handle the extra hand weight???? @r... pic.twitter.com/4lIuVXykna&amp;amp;mdash; Hilary Duff (@HilaryDuff) April 30, 2014 If you answered, &amp;quot;Why, that seems to be a photo of Hilary pulling her trainer on a sled during her workout,&amp;quot; you are 100 percent correct. Apparently, Hilary&amp;#x27;s pal&amp;amp;#8212;comedian Whitney Cummings&amp;amp;#8212;posted a similar pic just a few days before, dragging along the same 185-pound trainer: ...and the result was some friendly competition! Still, the question remains: What does this particular exercise do? It&amp;#x27;s a takeoff of a move that some football players do, where they drag tires or weighted sleds that targets the core, hip, thigh, and leg muscles in order to build strength and increase running speed. (Obviously, to pull this off&amp;amp;#8212;heh!&amp;amp;#8212;you need proper supervision so that you don&amp;#x27;t hurt yourself. I&amp;#x27;m thinking you can&amp;#x27;t just put your boyfriend on a sled and drag him around!) Have you ever tried anything like this?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.glamour.com/health-fitness/blogs/vitamin-g/2014/05/hilary-duff-workout>