KNIGHT CLUB FITNESS: 21st Space Wing monthly fitness challenge Published March 28, 2017 By Senior Airman Rosemary Gudex 21st Space Wing Public Affairs PETERSON AIR FORCE BASE, Colo. -- The Knights of the 21st Space wing sometimes find themselves too busy to get away from their desks throughout the day, but who doesn’t love a good challenge. To get the blood flowing, take a few minutes throughout the day to step back and regain some focus. See who in your office sticks with this ab challenge it for the entire month! Week 1: 10 bicycle crunches, 20 leg raises, 30 crunches, 20 reverses crunches, 10 side plank hip dips (each side) Week 2: 15 bicycle crunches (each side), 25 leg raises, 35 crunches, 25 reverse crunches, 15 side plank hip dips (each side) Week 3: 20 bicycle crunches (each side), 30 leg raises, 40 crunches, 30 reverse crunches, 20 side plank hip dips (each side) Week 4: 25 bicycle crunches (each side), 35 leg raises, 55 crunches, 35 reverses crunches, 25 side plank hip dips (each side) *Cut this section out of the paper and pin up for your office to do for the month!