"Filthy Fifty" 50 Box Jumps (24/20 in) 50 Jumping Pull-Ups 50 Kettlebell Swings (35/26) 50 Walking Lunges 50 Knees-to-Elbows 50 Push Press (45/33) 50 Back Extensions 50 Wall Balls (20/14) 50 Burpees 50 Double-Unders      ...