500 Rep Core Challenge By hijrt on August 1, 2017 in HI-JRT News THE CHALLENGE 50 Rope Jumps 25 Sit Ups 50 Rope Jumps 25 Leg Ups 50 Rope Jumps 25 Bicycle Crunches 50 Rope Jumps 25 Seated In & Outs 50 Rope Jumps 25 High-Low Plank 50 Rope Jumps 25 V-Ups 50 Rope Jumps
