====== Core Set ======
===== CORE SET 1 =====
  - In/Outs
  - Bicycle Forward
  - Bicycle Reverse

===== CORE SET 2 =====
  - Side V Roll Up (side crunches)
  - Pulse Ups
  - Mason Twist

===== CORE SET 3 =====
  - Fifer Scissors (hold for 2)
  - Hip Rock ‘n raise (froggy legs, pulse up)
  - Leg Climbs 

===== CORE SET 4 =====
  - Straddle Leg Crossover Sit Ups
  - Windshield Wiper
  - Leg raises (work toward advanced spinal rock)