At least they do to me!
A little quote in case the link doesn't work:
"Adapting to battlefield experience in Afghanistan and Iraq, the Army is revamping its basic training regimen for the first time in three decades by nixing five-mile runs and bayonet drills in favor of zigzag sprints and honing core muscles."
The Marines are doing it too:
"The Marine Corps is also applying war lessons to its physical training, adopting a new combat fitness test that replicates the rigor of combat. The test, which is required once a year, has Marines running sprints, lifting 30-pound ammunition cans over their heads for a couple of minutes and completing a 300-yard obstacle course that includes carrying a mock wounded Marine and throwing a mock grenade."
Looks like a case of 'what's old is new again.'