55 X 4's

55 yards sprinted 80%-100% 4 times through per set. many sets ensue.

coach: okay guys, we've only got 8 sets of 55 X 4's today, 14 sets of GPP, and 15 100 yd. dashes
everyone else: (trying to act like they're not defeated)

by Rickey Dudley May 6, 2006