Photo Gallery: Fit Like a Stone Age Man
02/08/2010
Thirty-eight-year-old Frenchman Erwan Le Corre: In his courses, participants...
Erwan Le Corre / MovNat

Thirty-eight-year-old Frenchman Erwan Le Corre: In his courses, participants must crawl on all fours through the undergrowth, play knock-down with stones the size of bowling balls and run half-naked through the forest.