B1. 15 tough russian kb swings (unbroken) X 4; rest 30 seconds
B2. 5 overhead medicine ball throws for maximum distance @ 20/15 X 4; rest 30 seconds
proving ground 1. n. any place, context, or area for testing something, as a piece of scientific equipment, a theory, etc. 2. n. an area where dedicated individuals test their mettle by relentlessly pursuing excellence in performance based physical fitness 3. n. Louisiana's premier strength and conditioning organization